./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS --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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- 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-4e7fbc6 [2022-11-23 03:47:17,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:47:17,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:47:17,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:47:17,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:47:17,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:47:17,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:47:17,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:47:17,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:47:17,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:47:17,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:47:17,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:47:17,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:47:17,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:47:17,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:47:17,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:47:17,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:47:17,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:47:17,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:47:17,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:47:17,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:47:17,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:47:17,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:47:17,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:47:17,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:47:17,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:47:17,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:47:17,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:47:17,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:47:17,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:47:17,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:47:17,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:47:17,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:47:17,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:47:17,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:47:17,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:47:17,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:47:17,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:47:17,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:47:17,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:47:17,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:47:17,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:47:17,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:47:17,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:47:17,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:47:17,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:47:17,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:47:17,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:47:17,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:47:17,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:47:17,221 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:47:17,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:47:17,222 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:47:17,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:47:17,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:47:17,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:47:17,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:47:17,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:47:17,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:47:17,223 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:47:17,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:47:17,224 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:47:17,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:47:17,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:47:17,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:47:17,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:47:17,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:47:17,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:47:17,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:47:17,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:47:17,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:47:17,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:47:17,227 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:47:17,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:47:17,243 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:47:17,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:47:17,243 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-11-23 03:47:17,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:47:17,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:47:17,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:47:17,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:47:17,587 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:47:17,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-11-23 03:47:20,734 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:47:20,941 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:47:20,941 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-11-23 03:47:20,950 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/data/c35ca4293/c5ac955213244abcb7f045fe5bf14af7/FLAG94096938f [2022-11-23 03:47:20,967 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/data/c35ca4293/c5ac955213244abcb7f045fe5bf14af7 [2022-11-23 03:47:20,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:47:20,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:47:20,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:47:20,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:47:20,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:47:20,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:20" (1/1) ... [2022-11-23 03:47:20,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a44745a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20, skipping insertion in model container [2022-11-23 03:47:20,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:20" (1/1) ... [2022-11-23 03:47:20,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:47:21,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:47:21,231 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-11-23 03:47:21,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:47:21,251 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:47:21,277 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-11-23 03:47:21,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:47:21,296 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:47:21,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21 WrapperNode [2022-11-23 03:47:21,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:47:21,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:47:21,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:47:21,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:47:21,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,366 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-11-23 03:47:21,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:47:21,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:47:21,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:47:21,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:47:21,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,397 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:47:21,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:47:21,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:47:21,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:47:21,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (1/1) ... [2022-11-23 03:47:21,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:47:21,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:21,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:47:21,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:47:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:47:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:47:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:47:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:47:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:47:21,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:47:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:47:21,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:47:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:47:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:47:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:47:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:47:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:47:21,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:47:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:47:21,535 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:47:21,673 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:47:21,675 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:47:22,065 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:47:22,232 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:47:22,233 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 03:47:22,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:22 BoogieIcfgContainer [2022-11-23 03:47:22,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:47:22,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:47:22,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:47:22,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:47:22,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:47:20" (1/3) ... [2022-11-23 03:47:22,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f8df3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:22, skipping insertion in model container [2022-11-23 03:47:22,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:21" (2/3) ... [2022-11-23 03:47:22,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f8df3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:22, skipping insertion in model container [2022-11-23 03:47:22,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:22" (3/3) ... [2022-11-23 03:47:22,247 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-11-23 03:47:22,259 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:47:22,273 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:47:22,273 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:47:22,273 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:47:22,386 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:47:22,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2022-11-23 03:47:22,595 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2022-11-23 03:47:22,596 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:47:22,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2022-11-23 03:47:22,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2022-11-23 03:47:22,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2022-11-23 03:47:22,684 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:47:22,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 134 transitions, 280 flow [2022-11-23 03:47:22,719 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 134 transitions, 280 flow [2022-11-23 03:47:22,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 134 transitions, 280 flow [2022-11-23 03:47:22,757 INFO L130 PetriNetUnfolder]: 11/134 cut-off events. [2022-11-23 03:47:22,757 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:47:22,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2022-11-23 03:47:22,760 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2022-11-23 03:47:29,001 INFO L134 LiptonReduction]: Checked pairs total: 800 [2022-11-23 03:47:29,001 INFO L136 LiptonReduction]: Total number of compositions: 142 [2022-11-23 03:47:29,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:47:29,040 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;@2bacea18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:47:29,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 03:47:29,061 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-23 03:47:29,062 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:47:29,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:29,063 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:29,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash -786595395, now seen corresponding path program 1 times [2022-11-23 03:47:29,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:29,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234550162] [2022-11-23 03:47:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:29,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234550162] [2022-11-23 03:47:29,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234550162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:47:29,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:47:29,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:47:29,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168382709] [2022-11-23 03:47:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:47:29,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:47:29,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:47:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:47:29,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 287 [2022-11-23 03:47:29,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:29,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:29,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 287 [2022-11-23 03:47:29,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:29,865 INFO L130 PetriNetUnfolder]: 48/91 cut-off events. [2022-11-23 03:47:29,873 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 03:47:29,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 91 events. 48/91 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 202 event pairs, 24 based on Foata normal form. 8/74 useless extension candidates. Maximal degree in co-relation 131. Up to 81 conditions per place. [2022-11-23 03:47:29,875 INFO L137 encePairwiseOnDemand]: 280/287 looper letters, 15 selfloop transitions, 2 changer transitions 6/24 dead transitions. [2022-11-23 03:47:29,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 112 flow [2022-11-23 03:47:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:47:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:47:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 519 transitions. [2022-11-23 03:47:29,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4520905923344948 [2022-11-23 03:47:29,896 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 519 transitions. [2022-11-23 03:47:29,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 519 transitions. [2022-11-23 03:47:29,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:29,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 519 transitions. [2022-11-23 03:47:29,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:29,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:29,916 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:29,919 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 519 transitions. [2022-11-23 03:47:29,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 112 flow [2022-11-23 03:47:29,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:47:29,925 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2022-11-23 03:47:29,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2022-11-23 03:47:29,931 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2022-11-23 03:47:29,931 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2022-11-23 03:47:29,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:29,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:29,932 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:29,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:47:29,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash 483159449, now seen corresponding path program 1 times [2022-11-23 03:47:29,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:29,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113666929] [2022-11-23 03:47:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:29,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:47:30,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:30,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113666929] [2022-11-23 03:47:30,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113666929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:47:30,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:47:30,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 03:47:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389621775] [2022-11-23 03:47:30,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:47:30,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:47:30,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:47:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:47:31,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 287 [2022-11-23 03:47:31,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:31,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:31,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 287 [2022-11-23 03:47:31,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:31,380 INFO L130 PetriNetUnfolder]: 78/140 cut-off events. [2022-11-23 03:47:31,380 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-23 03:47:31,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 140 events. 78/140 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 377 event pairs, 1 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 352. Up to 89 conditions per place. [2022-11-23 03:47:31,382 INFO L137 encePairwiseOnDemand]: 278/287 looper letters, 32 selfloop transitions, 13 changer transitions 5/50 dead transitions. [2022-11-23 03:47:31,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 249 flow [2022-11-23 03:47:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:47:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:47:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 970 transitions. [2022-11-23 03:47:31,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42247386759581884 [2022-11-23 03:47:31,389 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 970 transitions. [2022-11-23 03:47:31,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 970 transitions. [2022-11-23 03:47:31,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:31,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 970 transitions. [2022-11-23 03:47:31,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.25) internal successors, (970), 8 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:31,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:31,401 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:31,401 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 8 states and 970 transitions. [2022-11-23 03:47:31,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 249 flow [2022-11-23 03:47:31,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 03:47:31,404 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 147 flow [2022-11-23 03:47:31,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=147, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2022-11-23 03:47:31,405 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-11-23 03:47:31,405 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 147 flow [2022-11-23 03:47:31,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:31,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:31,407 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:31,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:47:31,407 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1509792595, now seen corresponding path program 2 times [2022-11-23 03:47:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:31,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218972533] [2022-11-23 03:47:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:47:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218972533] [2022-11-23 03:47:31,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218972533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:47:31,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:47:31,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 03:47:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24513104] [2022-11-23 03:47:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:47:31,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:47:31,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:31,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:47:31,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:47:32,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 287 [2022-11-23 03:47:32,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:32,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 287 [2022-11-23 03:47:32,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:32,285 INFO L130 PetriNetUnfolder]: 88/156 cut-off events. [2022-11-23 03:47:32,285 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-11-23 03:47:32,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 156 events. 88/156 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 407 event pairs, 7 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 559. Up to 120 conditions per place. [2022-11-23 03:47:32,287 INFO L137 encePairwiseOnDemand]: 278/287 looper letters, 29 selfloop transitions, 17 changer transitions 5/51 dead transitions. [2022-11-23 03:47:32,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 345 flow [2022-11-23 03:47:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:47:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:47:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 957 transitions. [2022-11-23 03:47:32,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41681184668989546 [2022-11-23 03:47:32,296 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 957 transitions. [2022-11-23 03:47:32,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 957 transitions. [2022-11-23 03:47:32,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:32,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 957 transitions. [2022-11-23 03:47:32,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.625) internal successors, (957), 8 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) [2022-11-23 03:47:32,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,306 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,306 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 147 flow. Second operand 8 states and 957 transitions. [2022-11-23 03:47:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 345 flow [2022-11-23 03:47:32,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-11-23 03:47:32,313 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 222 flow [2022-11-23 03:47:32,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-11-23 03:47:32,315 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2022-11-23 03:47:32,316 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 222 flow [2022-11-23 03:47:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:32,317 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:32,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:47:32,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:32,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1707387423, now seen corresponding path program 3 times [2022-11-23 03:47:32,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:32,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453480849] [2022-11-23 03:47:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:32,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:47:32,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:32,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453480849] [2022-11-23 03:47:32,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453480849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:47:32,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:47:32,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:47:32,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513890207] [2022-11-23 03:47:32,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:47:32,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:47:32,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:47:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:47:32,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 287 [2022-11-23 03:47:32,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:32,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 287 [2022-11-23 03:47:32,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:32,502 INFO L130 PetriNetUnfolder]: 63/119 cut-off events. [2022-11-23 03:47:32,503 INFO L131 PetriNetUnfolder]: For 122/124 co-relation queries the response was YES. [2022-11-23 03:47:32,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 119 events. 63/119 cut-off events. For 122/124 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 300 event pairs, 10 based on Foata normal form. 8/105 useless extension candidates. Maximal degree in co-relation 435. Up to 103 conditions per place. [2022-11-23 03:47:32,505 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2022-11-23 03:47:32,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 243 flow [2022-11-23 03:47:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:47:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:47:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2022-11-23 03:47:32,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2022-11-23 03:47:32,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2022-11-23 03:47:32,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2022-11-23 03:47:32,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:32,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2022-11-23 03:47:32,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,513 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 222 flow. Second operand 3 states and 393 transitions. [2022-11-23 03:47:32,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 243 flow [2022-11-23 03:47:32,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 222 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-23 03:47:32,516 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 165 flow [2022-11-23 03:47:32,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2022-11-23 03:47:32,517 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2022-11-23 03:47:32,517 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 165 flow [2022-11-23 03:47:32,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:32,518 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:32,518 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:32,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:47:32,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:32,519 INFO L85 PathProgramCache]: Analyzing trace with hash -755495933, now seen corresponding path program 4 times [2022-11-23 03:47:32,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:32,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828615940] [2022-11-23 03:47:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:32,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:47:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828615940] [2022-11-23 03:47:33,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828615940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:47:33,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:47:33,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 03:47:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910331996] [2022-11-23 03:47:33,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:47:33,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:47:33,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:33,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:47:33,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:47:33,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 287 [2022-11-23 03:47:33,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:33,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 287 [2022-11-23 03:47:33,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:33,293 INFO L130 PetriNetUnfolder]: 66/130 cut-off events. [2022-11-23 03:47:33,294 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-11-23 03:47:33,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 130 events. 66/130 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 352 event pairs, 7 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 442. Up to 94 conditions per place. [2022-11-23 03:47:33,296 INFO L137 encePairwiseOnDemand]: 278/287 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2022-11-23 03:47:33,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 296 flow [2022-11-23 03:47:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:47:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:47:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2022-11-23 03:47:33,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2022-11-23 03:47:33,300 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2022-11-23 03:47:33,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2022-11-23 03:47:33,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:33,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2022-11-23 03:47:33,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,308 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,309 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 165 flow. Second operand 8 states and 952 transitions. [2022-11-23 03:47:33,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 296 flow [2022-11-23 03:47:33,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:47:33,314 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 185 flow [2022-11-23 03:47:33,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2022-11-23 03:47:33,315 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2022-11-23 03:47:33,315 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 185 flow [2022-11-23 03:47:33,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:33,316 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:33,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:47:33,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:33,318 INFO L85 PathProgramCache]: Analyzing trace with hash 932144370, now seen corresponding path program 1 times [2022-11-23 03:47:33,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:33,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866493165] [2022-11-23 03:47:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:47:33,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:33,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866493165] [2022-11-23 03:47:33,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866493165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:47:33,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:47:33,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:47:33,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483282962] [2022-11-23 03:47:33,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:47:33,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:47:33,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:47:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:47:33,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 287 [2022-11-23 03:47:33,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:33,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 287 [2022-11-23 03:47:33,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:33,543 INFO L130 PetriNetUnfolder]: 88/175 cut-off events. [2022-11-23 03:47:33,543 INFO L131 PetriNetUnfolder]: For 172/178 co-relation queries the response was YES. [2022-11-23 03:47:33,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 175 events. 88/175 cut-off events. For 172/178 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 553 event pairs, 10 based on Foata normal form. 8/147 useless extension candidates. Maximal degree in co-relation 617. Up to 69 conditions per place. [2022-11-23 03:47:33,545 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 33 selfloop transitions, 10 changer transitions 7/52 dead transitions. [2022-11-23 03:47:33,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 365 flow [2022-11-23 03:47:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:47:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:47:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2022-11-23 03:47:33,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2022-11-23 03:47:33,548 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2022-11-23 03:47:33,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2022-11-23 03:47:33,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:33,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2022-11-23 03:47:33,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,554 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 185 flow. Second operand 4 states and 540 transitions. [2022-11-23 03:47:33,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 365 flow [2022-11-23 03:47:33,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 333 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-23 03:47:33,557 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 200 flow [2022-11-23 03:47:33,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-11-23 03:47:33,558 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2022-11-23 03:47:33,558 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 200 flow [2022-11-23 03:47:33,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:33,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:33,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:33,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:47:33,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash -831162126, now seen corresponding path program 1 times [2022-11-23 03:47:33,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:33,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653178174] [2022-11-23 03:47:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:33,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:33,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:33,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653178174] [2022-11-23 03:47:33,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653178174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:33,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928514286] [2022-11-23 03:47:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:33,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:33,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:33,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:47:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:33,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:47:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:34,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:47:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:34,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928514286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:47:34,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:47:34,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 03:47:34,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768967870] [2022-11-23 03:47:34,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:47:34,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:47:34,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:47:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:47:34,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 287 [2022-11-23 03:47:34,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 200 flow. Second operand has 12 states, 12 states have (on average 121.25) internal successors, (1455), 12 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:34,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:34,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 287 [2022-11-23 03:47:34,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:34,380 INFO L130 PetriNetUnfolder]: 80/171 cut-off events. [2022-11-23 03:47:34,380 INFO L131 PetriNetUnfolder]: For 359/373 co-relation queries the response was YES. [2022-11-23 03:47:34,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 171 events. 80/171 cut-off events. For 359/373 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 515 event pairs, 37 based on Foata normal form. 16/151 useless extension candidates. Maximal degree in co-relation 580. Up to 135 conditions per place. [2022-11-23 03:47:34,382 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 26 selfloop transitions, 3 changer transitions 16/47 dead transitions. [2022-11-23 03:47:34,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 388 flow [2022-11-23 03:47:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:47:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:47:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 747 transitions. [2022-11-23 03:47:34,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4337979094076655 [2022-11-23 03:47:34,386 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 747 transitions. [2022-11-23 03:47:34,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 747 transitions. [2022-11-23 03:47:34,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:34,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 747 transitions. [2022-11-23 03:47:34,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.5) internal successors, (747), 6 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:34,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 287.0) internal successors, (2009), 7 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:34,393 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 287.0) internal successors, (2009), 7 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:34,393 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 200 flow. Second operand 6 states and 747 transitions. [2022-11-23 03:47:34,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 388 flow [2022-11-23 03:47:34,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 341 flow, removed 20 selfloop flow, removed 2 redundant places. [2022-11-23 03:47:34,397 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 196 flow [2022-11-23 03:47:34,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2022-11-23 03:47:34,398 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2022-11-23 03:47:34,398 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 196 flow [2022-11-23 03:47:34,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 121.25) internal successors, (1455), 12 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:34,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:34,399 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:34,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:47:34,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:47:34,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1168789210, now seen corresponding path program 2 times [2022-11-23 03:47:34,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:34,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249852354] [2022-11-23 03:47:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:35,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:35,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249852354] [2022-11-23 03:47:35,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249852354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383335814] [2022-11-23 03:47:35,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:47:35,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:35,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:35,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:47:35,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:47:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:47:35,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 03:47:35,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:35,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:47:35,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:47:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:36,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:47:36,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:36,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-23 03:47:36,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-23 03:47:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:36,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383335814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:47:36,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:47:36,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-23 03:47:36,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538973153] [2022-11-23 03:47:36,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:47:36,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 03:47:36,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:36,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 03:47:36,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-11-23 03:47:37,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 287 [2022-11-23 03:47:37,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 196 flow. Second operand has 23 states, 23 states have (on average 107.82608695652173) internal successors, (2480), 23 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:37,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:37,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 287 [2022-11-23 03:47:37,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:39,608 INFO L130 PetriNetUnfolder]: 240/480 cut-off events. [2022-11-23 03:47:39,609 INFO L131 PetriNetUnfolder]: For 545/567 co-relation queries the response was YES. [2022-11-23 03:47:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 480 events. 240/480 cut-off events. For 545/567 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2077 event pairs, 27 based on Foata normal form. 10/379 useless extension candidates. Maximal degree in co-relation 1793. Up to 147 conditions per place. [2022-11-23 03:47:39,613 INFO L137 encePairwiseOnDemand]: 279/287 looper letters, 94 selfloop transitions, 45 changer transitions 1/142 dead transitions. [2022-11-23 03:47:39,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 142 transitions, 1063 flow [2022-11-23 03:47:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:47:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:47:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2014 transitions. [2022-11-23 03:47:39,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3898567557104142 [2022-11-23 03:47:39,621 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2014 transitions. [2022-11-23 03:47:39,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2014 transitions. [2022-11-23 03:47:39,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:39,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2014 transitions. [2022-11-23 03:47:39,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 111.88888888888889) internal successors, (2014), 18 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:39,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:39,639 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:39,639 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 196 flow. Second operand 18 states and 2014 transitions. [2022-11-23 03:47:39,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 142 transitions, 1063 flow [2022-11-23 03:47:39,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 142 transitions, 997 flow, removed 31 selfloop flow, removed 4 redundant places. [2022-11-23 03:47:39,646 INFO L231 Difference]: Finished difference. Result has 59 places, 76 transitions, 677 flow [2022-11-23 03:47:39,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=677, PETRI_PLACES=59, PETRI_TRANSITIONS=76} [2022-11-23 03:47:39,647 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2022-11-23 03:47:39,647 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 76 transitions, 677 flow [2022-11-23 03:47:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 107.82608695652173) internal successors, (2480), 23 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:39,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:39,649 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:39,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 03:47:39,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:39,854 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:39,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:39,855 INFO L85 PathProgramCache]: Analyzing trace with hash -178880165, now seen corresponding path program 1 times [2022-11-23 03:47:39,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:39,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066960683] [2022-11-23 03:47:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:39,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:41,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:41,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066960683] [2022-11-23 03:47:41,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066960683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:41,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308662628] [2022-11-23 03:47:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:41,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:41,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:41,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:41,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:47:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:41,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 03:47:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:41,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:47:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:47:41,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:47:42,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:42,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2022-11-23 03:47:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:47:42,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308662628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:47:42,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:47:42,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2022-11-23 03:47:42,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230210903] [2022-11-23 03:47:42,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:47:42,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 03:47:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:42,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 03:47:42,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-23 03:47:46,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 287 [2022-11-23 03:47:46,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 677 flow. Second operand has 28 states, 28 states have (on average 99.89285714285714) internal successors, (2797), 28 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:46,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:46,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 287 [2022-11-23 03:47:46,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:48,128 INFO L130 PetriNetUnfolder]: 321/620 cut-off events. [2022-11-23 03:47:48,128 INFO L131 PetriNetUnfolder]: For 1495/1495 co-relation queries the response was YES. [2022-11-23 03:47:48,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 620 events. 321/620 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2773 event pairs, 39 based on Foata normal form. 14/576 useless extension candidates. Maximal degree in co-relation 2363. Up to 457 conditions per place. [2022-11-23 03:47:48,134 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 93 selfloop transitions, 45 changer transitions 6/144 dead transitions. [2022-11-23 03:47:48,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 144 transitions, 1352 flow [2022-11-23 03:47:48,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:47:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:47:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1853 transitions. [2022-11-23 03:47:48,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3586914440572977 [2022-11-23 03:47:48,141 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1853 transitions. [2022-11-23 03:47:48,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1853 transitions. [2022-11-23 03:47:48,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:48,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1853 transitions. [2022-11-23 03:47:48,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.94444444444444) internal successors, (1853), 18 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:48,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:48,158 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:48,159 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 677 flow. Second operand 18 states and 1853 transitions. [2022-11-23 03:47:48,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 144 transitions, 1352 flow [2022-11-23 03:47:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 144 transitions, 1252 flow, removed 46 selfloop flow, removed 4 redundant places. [2022-11-23 03:47:48,175 INFO L231 Difference]: Finished difference. Result has 80 places, 105 transitions, 1006 flow [2022-11-23 03:47:48,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1006, PETRI_PLACES=80, PETRI_TRANSITIONS=105} [2022-11-23 03:47:48,177 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2022-11-23 03:47:48,177 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 105 transitions, 1006 flow [2022-11-23 03:47:48,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 99.89285714285714) internal successors, (2797), 28 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:48,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:48,179 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:48,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:47:48,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:48,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash -506845058, now seen corresponding path program 3 times [2022-11-23 03:47:48,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:48,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830904857] [2022-11-23 03:47:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:48,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:49,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:49,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830904857] [2022-11-23 03:47:49,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830904857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:49,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231537785] [2022-11-23 03:47:49,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:47:49,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:49,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:49,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:47:50,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:47:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:47:50,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:47:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:47:50,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:47:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 03:47:50,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:47:50,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231537785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:47:50,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:47:50,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2022-11-23 03:47:50,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920352944] [2022-11-23 03:47:50,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:47:50,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:47:50,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:47:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:47:50,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 287 [2022-11-23 03:47:50,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 105 transitions, 1006 flow. Second operand has 6 states, 6 states have (on average 117.5) internal successors, (705), 6 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:50,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:50,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 287 [2022-11-23 03:47:50,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:50,461 INFO L130 PetriNetUnfolder]: 308/567 cut-off events. [2022-11-23 03:47:50,462 INFO L131 PetriNetUnfolder]: For 2407/2433 co-relation queries the response was YES. [2022-11-23 03:47:50,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3057 conditions, 567 events. 308/567 cut-off events. For 2407/2433 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2361 event pairs, 23 based on Foata normal form. 24/552 useless extension candidates. Maximal degree in co-relation 3010. Up to 263 conditions per place. [2022-11-23 03:47:50,468 INFO L137 encePairwiseOnDemand]: 283/287 looper letters, 83 selfloop transitions, 26 changer transitions 0/113 dead transitions. [2022-11-23 03:47:50,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 113 transitions, 1275 flow [2022-11-23 03:47:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:47:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:47:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2022-11-23 03:47:50,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2022-11-23 03:47:50,471 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2022-11-23 03:47:50,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2022-11-23 03:47:50,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:50,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2022-11-23 03:47:50,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:50,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:50,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:50,476 INFO L175 Difference]: Start difference. First operand has 80 places, 105 transitions, 1006 flow. Second operand 4 states and 488 transitions. [2022-11-23 03:47:50,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 113 transitions, 1275 flow [2022-11-23 03:47:50,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 1164 flow, removed 45 selfloop flow, removed 7 redundant places. [2022-11-23 03:47:50,495 INFO L231 Difference]: Finished difference. Result has 74 places, 102 transitions, 961 flow [2022-11-23 03:47:50,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=961, PETRI_PLACES=74, PETRI_TRANSITIONS=102} [2022-11-23 03:47:50,497 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2022-11-23 03:47:50,497 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 102 transitions, 961 flow [2022-11-23 03:47:50,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.5) internal successors, (705), 6 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:50,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:50,498 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:50,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:47:50,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 03:47:50,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:47:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1255395131, now seen corresponding path program 2 times [2022-11-23 03:47:50,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:50,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652533234] [2022-11-23 03:47:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652533234] [2022-11-23 03:47:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652533234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512270500] [2022-11-23 03:47:52,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:47:52,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:52,147 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:52,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:47:52,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:47:52,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:47:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 03:47:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:52,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:47:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:52,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:47:53,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:53,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2022-11-23 03:47:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:54,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512270500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:47:54,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:47:54,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-11-23 03:47:54,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909633781] [2022-11-23 03:47:54,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:47:54,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 03:47:54,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 03:47:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 03:47:56,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 287 [2022-11-23 03:47:56,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 102 transitions, 961 flow. Second operand has 33 states, 33 states have (on average 97.63636363636364) internal successors, (3222), 33 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:56,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:56,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 287 [2022-11-23 03:47:56,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:48:00,454 INFO L130 PetriNetUnfolder]: 473/908 cut-off events. [2022-11-23 03:48:00,454 INFO L131 PetriNetUnfolder]: For 3837/3837 co-relation queries the response was YES. [2022-11-23 03:48:00,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 908 events. 473/908 cut-off events. For 3837/3837 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4647 event pairs, 41 based on Foata normal form. 4/890 useless extension candidates. Maximal degree in co-relation 4123. Up to 469 conditions per place. [2022-11-23 03:48:00,463 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 122 selfloop transitions, 86 changer transitions 15/223 dead transitions. [2022-11-23 03:48:00,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 223 transitions, 2198 flow [2022-11-23 03:48:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 03:48:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 03:48:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2439 transitions. [2022-11-23 03:48:00,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35409407665505227 [2022-11-23 03:48:00,477 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2439 transitions. [2022-11-23 03:48:00,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2439 transitions. [2022-11-23 03:48:00,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:48:00,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2439 transitions. [2022-11-23 03:48:00,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 101.625) internal successors, (2439), 24 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:00,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 287.0) internal successors, (7175), 25 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:00,499 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 287.0) internal successors, (7175), 25 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:00,499 INFO L175 Difference]: Start difference. First operand has 74 places, 102 transitions, 961 flow. Second operand 24 states and 2439 transitions. [2022-11-23 03:48:00,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 223 transitions, 2198 flow [2022-11-23 03:48:00,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 223 transitions, 2125 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-11-23 03:48:00,537 INFO L231 Difference]: Finished difference. Result has 106 places, 147 transitions, 1733 flow [2022-11-23 03:48:00,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1733, PETRI_PLACES=106, PETRI_TRANSITIONS=147} [2022-11-23 03:48:00,538 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2022-11-23 03:48:00,539 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 147 transitions, 1733 flow [2022-11-23 03:48:00,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 97.63636363636364) internal successors, (3222), 33 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:00,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:48:00,540 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:48:00,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:48:00,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:48:00,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:48:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:48:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1114929083, now seen corresponding path program 3 times [2022-11-23 03:48:00,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:48:00,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232195414] [2022-11-23 03:48:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:48:00,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:48:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:01,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:48:01,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232195414] [2022-11-23 03:48:01,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232195414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:48:01,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628556419] [2022-11-23 03:48:01,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:48:01,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:48:01,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:48:01,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:48:01,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:48:02,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:48:02,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:48:02,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-23 03:48:02,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:48:02,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:48:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:02,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:48:03,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:48:03,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 39 [2022-11-23 03:48:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:04,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628556419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:48:04,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:48:04,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-23 03:48:04,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983263926] [2022-11-23 03:48:04,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:48:04,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 03:48:04,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:48:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 03:48:04,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-11-23 03:48:06,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 287 [2022-11-23 03:48:06,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 147 transitions, 1733 flow. Second operand has 32 states, 32 states have (on average 96.6875) internal successors, (3094), 32 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:06,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:48:06,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 287 [2022-11-23 03:48:06,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:48:10,082 INFO L130 PetriNetUnfolder]: 539/1038 cut-off events. [2022-11-23 03:48:10,082 INFO L131 PetriNetUnfolder]: For 7078/7078 co-relation queries the response was YES. [2022-11-23 03:48:10,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6244 conditions, 1038 events. 539/1038 cut-off events. For 7078/7078 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5529 event pairs, 101 based on Foata normal form. 3/1017 useless extension candidates. Maximal degree in co-relation 6153. Up to 746 conditions per place. [2022-11-23 03:48:10,099 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 146 selfloop transitions, 68 changer transitions 24/238 dead transitions. [2022-11-23 03:48:10,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 238 transitions, 2951 flow [2022-11-23 03:48:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 03:48:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-23 03:48:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2207 transitions. [2022-11-23 03:48:10,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3495407031992398 [2022-11-23 03:48:10,108 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2207 transitions. [2022-11-23 03:48:10,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2207 transitions. [2022-11-23 03:48:10,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:48:10,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2207 transitions. [2022-11-23 03:48:10,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 100.31818181818181) internal successors, (2207), 22 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:10,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 287.0) internal successors, (6601), 23 states have internal predecessors, (6601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:10,126 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 287.0) internal successors, (6601), 23 states have internal predecessors, (6601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:10,126 INFO L175 Difference]: Start difference. First operand has 106 places, 147 transitions, 1733 flow. Second operand 22 states and 2207 transitions. [2022-11-23 03:48:10,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 238 transitions, 2951 flow [2022-11-23 03:48:10,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 238 transitions, 2691 flow, removed 116 selfloop flow, removed 10 redundant places. [2022-11-23 03:48:10,181 INFO L231 Difference]: Finished difference. Result has 124 places, 175 transitions, 2123 flow [2022-11-23 03:48:10,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2123, PETRI_PLACES=124, PETRI_TRANSITIONS=175} [2022-11-23 03:48:10,185 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2022-11-23 03:48:10,185 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 175 transitions, 2123 flow [2022-11-23 03:48:10,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 96.6875) internal successors, (3094), 32 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:10,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:48:10,187 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:48:10,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:48:10,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 03:48:10,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:48:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:48:10,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1699681353, now seen corresponding path program 4 times [2022-11-23 03:48:10,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:48:10,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528243081] [2022-11-23 03:48:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:48:10,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:48:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:11,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:48:11,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528243081] [2022-11-23 03:48:11,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528243081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:48:11,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058281827] [2022-11-23 03:48:11,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:48:11,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:48:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:48:11,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:48:11,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:48:11,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:48:11,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:48:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 03:48:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:48:12,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:48:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:12,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:48:12,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:48:12,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-11-23 03:48:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:13,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058281827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:48:13,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:48:13,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-11-23 03:48:13,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53427302] [2022-11-23 03:48:13,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:48:13,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 03:48:13,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:48:13,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 03:48:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-11-23 03:48:15,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 287 [2022-11-23 03:48:15,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 175 transitions, 2123 flow. Second operand has 31 states, 31 states have (on average 97.6774193548387) internal successors, (3028), 31 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:15,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:48:15,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 287 [2022-11-23 03:48:15,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:48:19,216 INFO L130 PetriNetUnfolder]: 648/1251 cut-off events. [2022-11-23 03:48:19,216 INFO L131 PetriNetUnfolder]: For 9409/9409 co-relation queries the response was YES. [2022-11-23 03:48:19,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7723 conditions, 1251 events. 648/1251 cut-off events. For 9409/9409 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7049 event pairs, 59 based on Foata normal form. 4/1231 useless extension candidates. Maximal degree in co-relation 7625. Up to 873 conditions per place. [2022-11-23 03:48:19,228 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 172 selfloop transitions, 94 changer transitions 11/277 dead transitions. [2022-11-23 03:48:19,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 277 transitions, 3542 flow [2022-11-23 03:48:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 03:48:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 03:48:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2128 transitions. [2022-11-23 03:48:19,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3530778164924506 [2022-11-23 03:48:19,234 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2128 transitions. [2022-11-23 03:48:19,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2128 transitions. [2022-11-23 03:48:19,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:48:19,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2128 transitions. [2022-11-23 03:48:19,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.33333333333333) internal successors, (2128), 21 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:19,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:19,253 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:19,253 INFO L175 Difference]: Start difference. First operand has 124 places, 175 transitions, 2123 flow. Second operand 21 states and 2128 transitions. [2022-11-23 03:48:19,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 277 transitions, 3542 flow [2022-11-23 03:48:19,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 277 transitions, 3393 flow, removed 58 selfloop flow, removed 11 redundant places. [2022-11-23 03:48:19,339 INFO L231 Difference]: Finished difference. Result has 136 places, 216 transitions, 2897 flow [2022-11-23 03:48:19,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2897, PETRI_PLACES=136, PETRI_TRANSITIONS=216} [2022-11-23 03:48:19,341 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2022-11-23 03:48:19,341 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 216 transitions, 2897 flow [2022-11-23 03:48:19,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 97.6774193548387) internal successors, (3028), 31 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:19,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:48:19,345 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:48:19,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:48:19,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 03:48:19,552 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:48:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:48:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash 700494735, now seen corresponding path program 5 times [2022-11-23 03:48:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:48:19,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576579550] [2022-11-23 03:48:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:48:19,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:48:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:20,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:48:20,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576579550] [2022-11-23 03:48:20,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576579550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:48:20,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217976152] [2022-11-23 03:48:20,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:48:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:48:20,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:48:20,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:48:20,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:48:20,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:48:20,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:48:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 03:48:20,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:48:21,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:48:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:48:21,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:48:21,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:48:21,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-23 03:48:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:48:21,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217976152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:48:21,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:48:21,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2022-11-23 03:48:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762370342] [2022-11-23 03:48:21,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:48:21,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 03:48:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:48:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 03:48:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-11-23 03:48:24,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 287 [2022-11-23 03:48:24,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 216 transitions, 2897 flow. Second operand has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:24,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:48:24,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 287 [2022-11-23 03:48:24,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:48:25,563 INFO L130 PetriNetUnfolder]: 646/1251 cut-off events. [2022-11-23 03:48:25,563 INFO L131 PetriNetUnfolder]: For 10684/10684 co-relation queries the response was YES. [2022-11-23 03:48:25,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8272 conditions, 1251 events. 646/1251 cut-off events. For 10684/10684 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7076 event pairs, 118 based on Foata normal form. 2/1231 useless extension candidates. Maximal degree in co-relation 8166. Up to 1136 conditions per place. [2022-11-23 03:48:25,579 INFO L137 encePairwiseOnDemand]: 277/287 looper letters, 207 selfloop transitions, 31 changer transitions 15/253 dead transitions. [2022-11-23 03:48:25,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 253 transitions, 3645 flow [2022-11-23 03:48:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:48:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:48:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1819 transitions. [2022-11-23 03:48:25,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3521099496709253 [2022-11-23 03:48:25,584 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1819 transitions. [2022-11-23 03:48:25,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1819 transitions. [2022-11-23 03:48:25,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:48:25,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1819 transitions. [2022-11-23 03:48:25,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 101.05555555555556) internal successors, (1819), 18 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:25,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:25,596 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:25,596 INFO L175 Difference]: Start difference. First operand has 136 places, 216 transitions, 2897 flow. Second operand 18 states and 1819 transitions. [2022-11-23 03:48:25,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 253 transitions, 3645 flow [2022-11-23 03:48:25,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 253 transitions, 3507 flow, removed 54 selfloop flow, removed 9 redundant places. [2022-11-23 03:48:25,707 INFO L231 Difference]: Finished difference. Result has 147 places, 218 transitions, 2873 flow [2022-11-23 03:48:25,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2873, PETRI_PLACES=147, PETRI_TRANSITIONS=218} [2022-11-23 03:48:25,709 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 126 predicate places. [2022-11-23 03:48:25,709 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 218 transitions, 2873 flow [2022-11-23 03:48:25,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:25,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:48:25,710 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:48:25,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:48:25,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 03:48:25,924 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:48:25,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:48:25,924 INFO L85 PathProgramCache]: Analyzing trace with hash -857085565, now seen corresponding path program 6 times [2022-11-23 03:48:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:48:25,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26504156] [2022-11-23 03:48:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:48:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:48:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:27,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:48:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26504156] [2022-11-23 03:48:27,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26504156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:48:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069338397] [2022-11-23 03:48:27,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:48:27,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:48:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:48:27,575 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:48:27,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:48:28,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 03:48:28,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:48:28,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 03:48:28,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:48:28,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:48:28,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:48:28,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:48:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:48:28,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:48:29,085 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_397 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_397) c_~q~0.base) .cse1))) (or (= .cse0 0) (= c_~N~0 .cse0)))) (or (forall ((v_ArrVal_397 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_397) c_~q~0.base) .cse1) 0)) (= (mod c_~x~0 4294967296) (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296))))) is different from false [2022-11-23 03:48:29,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:48:29,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-11-23 03:48:29,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2022-11-23 03:48:29,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2022-11-23 03:48:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:48:29,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069338397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:48:29,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:48:29,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 30 [2022-11-23 03:48:29,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916260425] [2022-11-23 03:48:29,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:48:29,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 03:48:29,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:48:29,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 03:48:29,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=845, Unknown=1, NotChecked=58, Total=992 [2022-11-23 03:48:30,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 287 [2022-11-23 03:48:30,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 218 transitions, 2873 flow. Second operand has 32 states, 32 states have (on average 79.65625) internal successors, (2549), 32 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:30,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:48:30,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 287 [2022-11-23 03:48:30,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:48:32,670 INFO L130 PetriNetUnfolder]: 679/1332 cut-off events. [2022-11-23 03:48:32,671 INFO L131 PetriNetUnfolder]: For 11724/11724 co-relation queries the response was YES. [2022-11-23 03:48:32,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8679 conditions, 1332 events. 679/1332 cut-off events. For 11724/11724 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7827 event pairs, 52 based on Foata normal form. 3/1313 useless extension candidates. Maximal degree in co-relation 8583. Up to 954 conditions per place. [2022-11-23 03:48:32,684 INFO L137 encePairwiseOnDemand]: 277/287 looper letters, 191 selfloop transitions, 84 changer transitions 6/281 dead transitions. [2022-11-23 03:48:32,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 281 transitions, 3913 flow [2022-11-23 03:48:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:48:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:48:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1496 transitions. [2022-11-23 03:48:32,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28958575300038714 [2022-11-23 03:48:32,688 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1496 transitions. [2022-11-23 03:48:32,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1496 transitions. [2022-11-23 03:48:32,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:48:32,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1496 transitions. [2022-11-23 03:48:32,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 83.11111111111111) internal successors, (1496), 18 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:32,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:32,699 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:32,699 INFO L175 Difference]: Start difference. First operand has 147 places, 218 transitions, 2873 flow. Second operand 18 states and 1496 transitions. [2022-11-23 03:48:32,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 281 transitions, 3913 flow [2022-11-23 03:48:32,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 281 transitions, 3841 flow, removed 10 selfloop flow, removed 14 redundant places. [2022-11-23 03:48:32,789 INFO L231 Difference]: Finished difference. Result has 155 places, 234 transitions, 3301 flow [2022-11-23 03:48:32,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3301, PETRI_PLACES=155, PETRI_TRANSITIONS=234} [2022-11-23 03:48:32,790 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2022-11-23 03:48:32,790 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 234 transitions, 3301 flow [2022-11-23 03:48:32,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 79.65625) internal successors, (2549), 32 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:32,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:48:32,791 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:48:32,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:48:32,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 03:48:32,998 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:48:32,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:48:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 659921767, now seen corresponding path program 7 times [2022-11-23 03:48:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:48:32,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916975210] [2022-11-23 03:48:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:48:32,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:48:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:33,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:48:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916975210] [2022-11-23 03:48:33,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916975210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:48:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131812090] [2022-11-23 03:48:33,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:48:33,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:48:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:48:33,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:48:33,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:48:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 03:48:34,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:48:34,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:48:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:48:34,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:48:34,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:48:34,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-23 03:48:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:48:35,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131812090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:48:35,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:48:35,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2022-11-23 03:48:35,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348009619] [2022-11-23 03:48:35,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:48:35,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 03:48:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:48:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 03:48:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-11-23 03:48:37,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 287 [2022-11-23 03:48:37,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 234 transitions, 3301 flow. Second operand has 27 states, 27 states have (on average 99.96296296296296) internal successors, (2699), 27 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:37,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:48:37,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 287 [2022-11-23 03:48:37,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:48:39,149 INFO L130 PetriNetUnfolder]: 682/1338 cut-off events. [2022-11-23 03:48:39,150 INFO L131 PetriNetUnfolder]: For 15628/15628 co-relation queries the response was YES. [2022-11-23 03:48:39,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9330 conditions, 1338 events. 682/1338 cut-off events. For 15628/15628 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7831 event pairs, 119 based on Foata normal form. 2/1328 useless extension candidates. Maximal degree in co-relation 9229. Up to 1043 conditions per place. [2022-11-23 03:48:39,170 INFO L137 encePairwiseOnDemand]: 277/287 looper letters, 199 selfloop transitions, 70 changer transitions 6/275 dead transitions. [2022-11-23 03:48:39,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 275 transitions, 4126 flow [2022-11-23 03:48:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 03:48:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-23 03:48:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1652 transitions. [2022-11-23 03:48:39,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2022-11-23 03:48:39,174 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1652 transitions. [2022-11-23 03:48:39,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1652 transitions. [2022-11-23 03:48:39,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:48:39,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1652 transitions. [2022-11-23 03:48:39,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 103.25) internal successors, (1652), 16 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:39,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 287.0) internal successors, (4879), 17 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:39,188 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 287.0) internal successors, (4879), 17 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:39,188 INFO L175 Difference]: Start difference. First operand has 155 places, 234 transitions, 3301 flow. Second operand 16 states and 1652 transitions. [2022-11-23 03:48:39,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 275 transitions, 4126 flow [2022-11-23 03:48:39,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 275 transitions, 3965 flow, removed 59 selfloop flow, removed 10 redundant places. [2022-11-23 03:48:39,265 INFO L231 Difference]: Finished difference. Result has 163 places, 237 transitions, 3379 flow [2022-11-23 03:48:39,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3379, PETRI_PLACES=163, PETRI_TRANSITIONS=237} [2022-11-23 03:48:39,266 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2022-11-23 03:48:39,266 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 237 transitions, 3379 flow [2022-11-23 03:48:39,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 99.96296296296296) internal successors, (2699), 27 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:39,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:48:39,266 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:48:39,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:48:39,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 03:48:39,471 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:48:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:48:39,471 INFO L85 PathProgramCache]: Analyzing trace with hash 734623761, now seen corresponding path program 8 times [2022-11-23 03:48:39,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:48:39,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710175378] [2022-11-23 03:48:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:48:39,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:48:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:40,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:48:40,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710175378] [2022-11-23 03:48:40,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710175378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:48:40,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046902189] [2022-11-23 03:48:40,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:48:40,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:48:40,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:48:40,731 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:48:40,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:48:41,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:48:41,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:48:41,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-23 03:48:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:48:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:48:41,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:48:41,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:48:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:42,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:48:42,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:48:42,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 106 [2022-11-23 03:48:42,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2022-11-23 03:48:42,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 71 [2022-11-23 03:48:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:43,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046902189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:48:43,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:48:43,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2022-11-23 03:48:43,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478144408] [2022-11-23 03:48:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:48:43,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 03:48:43,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:48:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 03:48:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=977, Unknown=2, NotChecked=0, Total=1122 [2022-11-23 03:48:45,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 287 [2022-11-23 03:48:45,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 237 transitions, 3379 flow. Second operand has 34 states, 34 states have (on average 79.5) internal successors, (2703), 34 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:48:45,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:48:45,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 287 [2022-11-23 03:48:45,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:48:54,988 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:49:08,252 WARN L233 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 63 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:49:10,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:49:25,130 WARN L233 SmtUtils]: Spent 14.31s on a formula simplification. DAG size of input: 57 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:49:28,630 INFO L130 PetriNetUnfolder]: 806/1575 cut-off events. [2022-11-23 03:49:28,630 INFO L131 PetriNetUnfolder]: For 21391/21391 co-relation queries the response was YES. [2022-11-23 03:49:28,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11151 conditions, 1575 events. 806/1575 cut-off events. For 21391/21391 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9655 event pairs, 97 based on Foata normal form. 4/1567 useless extension candidates. Maximal degree in co-relation 11041. Up to 915 conditions per place. [2022-11-23 03:49:28,648 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 190 selfloop transitions, 173 changer transitions 10/373 dead transitions. [2022-11-23 03:49:28,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 373 transitions, 5415 flow [2022-11-23 03:49:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 03:49:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-23 03:49:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2340 transitions. [2022-11-23 03:49:28,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29118964659034346 [2022-11-23 03:49:28,654 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2340 transitions. [2022-11-23 03:49:28,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2340 transitions. [2022-11-23 03:49:28,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:49:28,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2340 transitions. [2022-11-23 03:49:28,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 83.57142857142857) internal successors, (2340), 28 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:28,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 287.0) internal successors, (8323), 29 states have internal predecessors, (8323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:28,671 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 287.0) internal successors, (8323), 29 states have internal predecessors, (8323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:28,671 INFO L175 Difference]: Start difference. First operand has 163 places, 237 transitions, 3379 flow. Second operand 28 states and 2340 transitions. [2022-11-23 03:49:28,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 373 transitions, 5415 flow [2022-11-23 03:49:28,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 373 transitions, 5238 flow, removed 31 selfloop flow, removed 13 redundant places. [2022-11-23 03:49:28,808 INFO L231 Difference]: Finished difference. Result has 185 places, 295 transitions, 4668 flow [2022-11-23 03:49:28,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4668, PETRI_PLACES=185, PETRI_TRANSITIONS=295} [2022-11-23 03:49:28,809 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2022-11-23 03:49:28,810 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 295 transitions, 4668 flow [2022-11-23 03:49:28,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 79.5) internal successors, (2703), 34 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:28,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:49:28,811 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:49:28,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:49:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 03:49:29,018 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:49:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:49:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -157261061, now seen corresponding path program 9 times [2022-11-23 03:49:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:49:29,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387641767] [2022-11-23 03:49:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:49:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:49:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:49:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:49:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:49:30,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387641767] [2022-11-23 03:49:30,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387641767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:49:30,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754442120] [2022-11-23 03:49:30,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:49:30,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:49:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:49:30,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:49:30,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 03:49:31,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:49:31,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:49:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 03:49:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:49:31,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 03:49:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:49:31,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:49:32,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:49:32,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-23 03:49:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:49:33,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754442120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:49:33,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:49:33,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-11-23 03:49:33,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913770563] [2022-11-23 03:49:33,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:49:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 03:49:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:49:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 03:49:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 03:49:39,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 287 [2022-11-23 03:49:39,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 295 transitions, 4668 flow. Second operand has 33 states, 33 states have (on average 91.63636363636364) internal successors, (3024), 33 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:39,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:49:39,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 287 [2022-11-23 03:49:39,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:49:42,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:49:52,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:49:53,886 INFO L130 PetriNetUnfolder]: 1003/1970 cut-off events. [2022-11-23 03:49:53,886 INFO L131 PetriNetUnfolder]: For 33247/33247 co-relation queries the response was YES. [2022-11-23 03:49:53,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15250 conditions, 1970 events. 1003/1970 cut-off events. For 33247/33247 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12599 event pairs, 125 based on Foata normal form. 8/1965 useless extension candidates. Maximal degree in co-relation 15081. Up to 1380 conditions per place. [2022-11-23 03:49:53,905 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 285 selfloop transitions, 175 changer transitions 34/494 dead transitions. [2022-11-23 03:49:53,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 494 transitions, 7921 flow [2022-11-23 03:49:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 03:49:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-23 03:49:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3709 transitions. [2022-11-23 03:49:53,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3313678191726972 [2022-11-23 03:49:53,914 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3709 transitions. [2022-11-23 03:49:53,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3709 transitions. [2022-11-23 03:49:53,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:49:53,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3709 transitions. [2022-11-23 03:49:53,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 95.1025641025641) internal successors, (3709), 39 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:53,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 287.0) internal successors, (11480), 40 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:53,936 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 287.0) internal successors, (11480), 40 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:53,937 INFO L175 Difference]: Start difference. First operand has 185 places, 295 transitions, 4668 flow. Second operand 39 states and 3709 transitions. [2022-11-23 03:49:53,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 494 transitions, 7921 flow [2022-11-23 03:49:54,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 494 transitions, 7381 flow, removed 248 selfloop flow, removed 12 redundant places. [2022-11-23 03:49:54,169 INFO L231 Difference]: Finished difference. Result has 225 places, 378 transitions, 6337 flow [2022-11-23 03:49:54,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6337, PETRI_PLACES=225, PETRI_TRANSITIONS=378} [2022-11-23 03:49:54,170 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2022-11-23 03:49:54,171 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 378 transitions, 6337 flow [2022-11-23 03:49:54,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.63636363636364) internal successors, (3024), 33 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:49:54,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:49:54,172 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:49:54,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:49:54,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 03:49:54,379 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:49:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:49:54,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1395565009, now seen corresponding path program 10 times [2022-11-23 03:49:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:49:54,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335058653] [2022-11-23 03:49:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:49:54,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:49:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:49:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:49:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:49:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335058653] [2022-11-23 03:49:56,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335058653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:49:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252320428] [2022-11-23 03:49:56,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:49:56,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:49:56,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:49:56,303 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:49:56,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:49:56,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:49:56,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:49:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 03:49:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:49:57,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:49:57,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:49:57,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:49:57,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-23 03:49:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:49:57,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:49:58,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:49:58,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-11-23 03:49:58,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2022-11-23 03:49:58,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2022-11-23 03:49:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:49:59,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252320428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:49:59,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:49:59,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-23 03:49:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780260919] [2022-11-23 03:49:59,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:49:59,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 03:49:59,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:49:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 03:49:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1046, Unknown=2, NotChecked=0, Total=1190 [2022-11-23 03:50:03,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 287 [2022-11-23 03:50:03,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 378 transitions, 6337 flow. Second operand has 35 states, 35 states have (on average 79.54285714285714) internal successors, (2784), 35 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:03,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:50:03,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 287 [2022-11-23 03:50:03,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:50:26,378 WARN L233 SmtUtils]: Spent 12.44s on a formula simplification. DAG size of input: 53 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:50:35,204 WARN L233 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 79 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:50:50,003 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 61 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:50:51,754 INFO L130 PetriNetUnfolder]: 1091/2089 cut-off events. [2022-11-23 03:50:51,755 INFO L131 PetriNetUnfolder]: For 40280/40280 co-relation queries the response was YES. [2022-11-23 03:50:51,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17149 conditions, 2089 events. 1091/2089 cut-off events. For 40280/40280 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 13249 event pairs, 95 based on Foata normal form. 3/2077 useless extension candidates. Maximal degree in co-relation 16890. Up to 1115 conditions per place. [2022-11-23 03:50:51,781 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 226 selfloop transitions, 259 changer transitions 19/504 dead transitions. [2022-11-23 03:50:51,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 504 transitions, 8837 flow [2022-11-23 03:50:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 03:50:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-23 03:50:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2665 transitions. [2022-11-23 03:50:51,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29017857142857145 [2022-11-23 03:50:51,789 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2665 transitions. [2022-11-23 03:50:51,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2665 transitions. [2022-11-23 03:50:51,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:50:51,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2665 transitions. [2022-11-23 03:50:51,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 83.28125) internal successors, (2665), 32 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:51,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 287.0) internal successors, (9471), 33 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:51,807 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 287.0) internal successors, (9471), 33 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:51,807 INFO L175 Difference]: Start difference. First operand has 225 places, 378 transitions, 6337 flow. Second operand 32 states and 2665 transitions. [2022-11-23 03:50:51,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 504 transitions, 8837 flow [2022-11-23 03:50:52,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 504 transitions, 8134 flow, removed 331 selfloop flow, removed 16 redundant places. [2022-11-23 03:50:52,208 INFO L231 Difference]: Finished difference. Result has 245 places, 416 transitions, 7343 flow [2022-11-23 03:50:52,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=5728, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7343, PETRI_PLACES=245, PETRI_TRANSITIONS=416} [2022-11-23 03:50:52,209 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2022-11-23 03:50:52,209 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 416 transitions, 7343 flow [2022-11-23 03:50:52,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.54285714285714) internal successors, (2784), 35 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:52,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:50:52,210 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:50:52,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:50:52,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:50:52,411 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:50:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:50:52,411 INFO L85 PathProgramCache]: Analyzing trace with hash 780378002, now seen corresponding path program 11 times [2022-11-23 03:50:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:50:52,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625918625] [2022-11-23 03:50:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:50:52,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:50:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:50:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:50:52,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:50:52,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625918625] [2022-11-23 03:50:52,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625918625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:50:52,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925263176] [2022-11-23 03:50:52,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:50:52,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:50:52,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:50:52,571 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:50:52,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 03:50:52,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:50:52,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:50:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:50:52,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:50:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:50:52,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:50:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:50:53,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925263176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:50:53,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:50:53,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 18 [2022-11-23 03:50:53,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559378186] [2022-11-23 03:50:53,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:50:53,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 03:50:53,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:50:53,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 03:50:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-23 03:50:53,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 287 [2022-11-23 03:50:53,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 416 transitions, 7343 flow. Second operand has 19 states, 19 states have (on average 119.57894736842105) internal successors, (2272), 19 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:53,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:50:53,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 287 [2022-11-23 03:50:53,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:50:54,574 INFO L130 PetriNetUnfolder]: 959/1948 cut-off events. [2022-11-23 03:50:54,574 INFO L131 PetriNetUnfolder]: For 41888/41911 co-relation queries the response was YES. [2022-11-23 03:50:54,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15155 conditions, 1948 events. 959/1948 cut-off events. For 41888/41911 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 13129 event pairs, 71 based on Foata normal form. 241/2169 useless extension candidates. Maximal degree in co-relation 15044. Up to 559 conditions per place. [2022-11-23 03:50:54,589 INFO L137 encePairwiseOnDemand]: 280/287 looper letters, 168 selfloop transitions, 105 changer transitions 179/458 dead transitions. [2022-11-23 03:50:54,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 458 transitions, 8428 flow [2022-11-23 03:50:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:50:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 03:50:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1734 transitions. [2022-11-23 03:50:54,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4315579890492782 [2022-11-23 03:50:54,593 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1734 transitions. [2022-11-23 03:50:54,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1734 transitions. [2022-11-23 03:50:54,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:50:54,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1734 transitions. [2022-11-23 03:50:54,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.85714285714286) internal successors, (1734), 14 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:54,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 287.0) internal successors, (4305), 15 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:54,601 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 287.0) internal successors, (4305), 15 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:54,601 INFO L175 Difference]: Start difference. First operand has 245 places, 416 transitions, 7343 flow. Second operand 14 states and 1734 transitions. [2022-11-23 03:50:54,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 458 transitions, 8428 flow [2022-11-23 03:50:54,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 458 transitions, 7888 flow, removed 210 selfloop flow, removed 20 redundant places. [2022-11-23 03:50:54,887 INFO L231 Difference]: Finished difference. Result has 238 places, 229 transitions, 4085 flow [2022-11-23 03:50:54,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4085, PETRI_PLACES=238, PETRI_TRANSITIONS=229} [2022-11-23 03:50:54,888 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2022-11-23 03:50:54,888 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 229 transitions, 4085 flow [2022-11-23 03:50:54,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 119.57894736842105) internal successors, (2272), 19 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:54,889 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:50:54,889 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:50:54,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:50:55,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:50:55,100 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:50:55,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:50:55,100 INFO L85 PathProgramCache]: Analyzing trace with hash 990708462, now seen corresponding path program 12 times [2022-11-23 03:50:55,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:50:55,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240411407] [2022-11-23 03:50:55,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:50:55,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:50:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:50:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:50:55,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:50:55,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240411407] [2022-11-23 03:50:55,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240411407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:50:55,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338129210] [2022-11-23 03:50:55,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:50:55,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:50:55,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:50:55,261 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:50:55,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 03:50:55,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 03:50:55,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:50:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:50:55,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:50:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:50:55,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:50:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:50:55,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338129210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:50:55,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:50:55,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-23 03:50:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522701512] [2022-11-23 03:50:55,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:50:55,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:50:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:50:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:50:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:50:56,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 287 [2022-11-23 03:50:56,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 229 transitions, 4085 flow. Second operand has 18 states, 18 states have (on average 121.11111111111111) internal successors, (2180), 18 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:56,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:50:56,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 287 [2022-11-23 03:50:56,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:50:56,605 INFO L130 PetriNetUnfolder]: 294/616 cut-off events. [2022-11-23 03:50:56,605 INFO L131 PetriNetUnfolder]: For 13484/13506 co-relation queries the response was YES. [2022-11-23 03:50:56,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 616 events. 294/616 cut-off events. For 13484/13506 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2998 event pairs, 97 based on Foata normal form. 85/683 useless extension candidates. Maximal degree in co-relation 5431. Up to 466 conditions per place. [2022-11-23 03:50:56,610 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 87 selfloop transitions, 4 changer transitions 50/145 dead transitions. [2022-11-23 03:50:56,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 145 transitions, 2852 flow [2022-11-23 03:50:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:50:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:50:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 992 transitions. [2022-11-23 03:50:56,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2022-11-23 03:50:56,613 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 992 transitions. [2022-11-23 03:50:56,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 992 transitions. [2022-11-23 03:50:56,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:50:56,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 992 transitions. [2022-11-23 03:50:56,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:56,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:56,619 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:56,619 INFO L175 Difference]: Start difference. First operand has 238 places, 229 transitions, 4085 flow. Second operand 8 states and 992 transitions. [2022-11-23 03:50:56,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 145 transitions, 2852 flow [2022-11-23 03:50:56,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 145 transitions, 2253 flow, removed 147 selfloop flow, removed 48 redundant places. [2022-11-23 03:50:56,703 INFO L231 Difference]: Finished difference. Result has 151 places, 95 transitions, 1376 flow [2022-11-23 03:50:56,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=151, PETRI_TRANSITIONS=95} [2022-11-23 03:50:56,704 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2022-11-23 03:50:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 95 transitions, 1376 flow [2022-11-23 03:50:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 121.11111111111111) internal successors, (2180), 18 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:50:56,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:50:56,705 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:50:56,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:50:56,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:50:56,911 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:50:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:50:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash 969014286, now seen corresponding path program 13 times [2022-11-23 03:50:56,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:50:56,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455669035] [2022-11-23 03:50:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:50:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:50:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:50:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:50:57,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:50:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455669035] [2022-11-23 03:50:57,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455669035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:50:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407224890] [2022-11-23 03:50:57,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:50:57,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:50:57,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:50:57,955 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:50:57,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 03:50:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:50:58,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 03:50:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:50:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:50:58,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:50:58,523 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-23 03:50:58,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-23 03:50:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 03:50:58,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407224890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:50:58,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:50:58,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2022-11-23 03:50:58,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000528495] [2022-11-23 03:50:58,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:50:58,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 03:50:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:50:58,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 03:50:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-23 03:51:00,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 287 [2022-11-23 03:51:00,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 95 transitions, 1376 flow. Second operand has 24 states, 24 states have (on average 110.20833333333333) internal successors, (2645), 24 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:00,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:51:00,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 287 [2022-11-23 03:51:00,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:51:05,300 INFO L130 PetriNetUnfolder]: 794/1474 cut-off events. [2022-11-23 03:51:05,300 INFO L131 PetriNetUnfolder]: For 15152/15152 co-relation queries the response was YES. [2022-11-23 03:51:05,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 1474 events. 794/1474 cut-off events. For 15152/15152 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8082 event pairs, 43 based on Foata normal form. 80/1529 useless extension candidates. Maximal degree in co-relation 9640. Up to 435 conditions per place. [2022-11-23 03:51:05,346 INFO L137 encePairwiseOnDemand]: 278/287 looper letters, 204 selfloop transitions, 228 changer transitions 6/438 dead transitions. [2022-11-23 03:51:05,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 438 transitions, 5750 flow [2022-11-23 03:51:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-23 03:51:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-23 03:51:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5795 transitions. [2022-11-23 03:51:05,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39591446334631414 [2022-11-23 03:51:05,357 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5795 transitions. [2022-11-23 03:51:05,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5795 transitions. [2022-11-23 03:51:05,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:51:05,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5795 transitions. [2022-11-23 03:51:05,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 113.62745098039215) internal successors, (5795), 51 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:05,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 287.0) internal successors, (14924), 52 states have internal predecessors, (14924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:05,390 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 287.0) internal successors, (14924), 52 states have internal predecessors, (14924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:05,390 INFO L175 Difference]: Start difference. First operand has 151 places, 95 transitions, 1376 flow. Second operand 51 states and 5795 transitions. [2022-11-23 03:51:05,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 438 transitions, 5750 flow [2022-11-23 03:51:05,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 438 transitions, 5426 flow, removed 56 selfloop flow, removed 20 redundant places. [2022-11-23 03:51:05,443 INFO L231 Difference]: Finished difference. Result has 159 places, 274 transitions, 4505 flow [2022-11-23 03:51:05,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=4505, PETRI_PLACES=159, PETRI_TRANSITIONS=274} [2022-11-23 03:51:05,444 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 138 predicate places. [2022-11-23 03:51:05,444 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 274 transitions, 4505 flow [2022-11-23 03:51:05,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.20833333333333) internal successors, (2645), 24 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:05,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:51:05,445 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:51:05,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 03:51:05,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 03:51:05,652 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:51:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:51:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2031840610, now seen corresponding path program 14 times [2022-11-23 03:51:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:51:05,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584680915] [2022-11-23 03:51:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:51:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:51:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:51:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:06,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:51:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584680915] [2022-11-23 03:51:06,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584680915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:51:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41287085] [2022-11-23 03:51:06,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:51:06,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:51:06,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:51:06,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:51:06,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 03:51:06,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:51:06,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:51:06,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 03:51:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:51:07,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:51:07,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-23 03:51:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:07,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:51:07,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:51:07,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-11-23 03:51:07,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-11-23 03:51:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:07,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41287085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:51:07,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:51:07,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-23 03:51:07,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307986040] [2022-11-23 03:51:07,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:51:07,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 03:51:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:51:07,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 03:51:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=724, Unknown=2, NotChecked=0, Total=870 [2022-11-23 03:51:08,518 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 287 [2022-11-23 03:51:08,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 274 transitions, 4505 flow. Second operand has 30 states, 30 states have (on average 98.53333333333333) internal successors, (2956), 30 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:08,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:51:08,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 287 [2022-11-23 03:51:08,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:51:13,912 INFO L130 PetriNetUnfolder]: 1377/2565 cut-off events. [2022-11-23 03:51:13,912 INFO L131 PetriNetUnfolder]: For 32700/32734 co-relation queries the response was YES. [2022-11-23 03:51:13,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 2565 events. 1377/2565 cut-off events. For 32700/32734 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15443 event pairs, 157 based on Foata normal form. 106/2664 useless extension candidates. Maximal degree in co-relation 19349. Up to 889 conditions per place. [2022-11-23 03:51:13,935 INFO L137 encePairwiseOnDemand]: 279/287 looper letters, 299 selfloop transitions, 334 changer transitions 0/639 dead transitions. [2022-11-23 03:51:13,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 639 transitions, 10785 flow [2022-11-23 03:51:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 03:51:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-23 03:51:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4019 transitions. [2022-11-23 03:51:13,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35906370052711517 [2022-11-23 03:51:13,946 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4019 transitions. [2022-11-23 03:51:13,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4019 transitions. [2022-11-23 03:51:13,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:51:13,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4019 transitions. [2022-11-23 03:51:13,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 103.05128205128206) internal successors, (4019), 39 states have internal predecessors, (4019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:13,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 287.0) internal successors, (11480), 40 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:13,972 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 287.0) internal successors, (11480), 40 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:13,972 INFO L175 Difference]: Start difference. First operand has 159 places, 274 transitions, 4505 flow. Second operand 39 states and 4019 transitions. [2022-11-23 03:51:13,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 639 transitions, 10785 flow [2022-11-23 03:51:14,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 639 transitions, 8171 flow, removed 1220 selfloop flow, removed 9 redundant places. [2022-11-23 03:51:14,163 INFO L231 Difference]: Finished difference. Result has 201 places, 504 transitions, 7512 flow [2022-11-23 03:51:14,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=7512, PETRI_PLACES=201, PETRI_TRANSITIONS=504} [2022-11-23 03:51:14,163 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2022-11-23 03:51:14,164 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 504 transitions, 7512 flow [2022-11-23 03:51:14,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 98.53333333333333) internal successors, (2956), 30 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:14,164 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:51:14,164 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:51:14,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 03:51:14,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 03:51:14,366 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:51:14,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:51:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash 528950502, now seen corresponding path program 15 times [2022-11-23 03:51:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:51:14,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201844448] [2022-11-23 03:51:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:51:14,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:51:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:51:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:16,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:51:16,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201844448] [2022-11-23 03:51:16,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201844448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:51:16,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446299201] [2022-11-23 03:51:16,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:51:16,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:51:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:51:16,224 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:51:16,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 03:51:16,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:51:16,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:51:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 03:51:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:51:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:51:16,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-23 03:51:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:51:16,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:51:16,831 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_723) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2022-11-23 03:51:16,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:51:16,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-11-23 03:51:16,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-11-23 03:51:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:51:17,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446299201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:51:17,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:51:17,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2022-11-23 03:51:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952667433] [2022-11-23 03:51:17,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:51:17,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 03:51:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:51:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 03:51:17,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=454, Unknown=1, NotChecked=42, Total=552 [2022-11-23 03:51:17,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 287 [2022-11-23 03:51:17,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 504 transitions, 7512 flow. Second operand has 24 states, 24 states have (on average 99.0) internal successors, (2376), 24 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:17,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:51:17,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 287 [2022-11-23 03:51:17,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:51:20,532 INFO L130 PetriNetUnfolder]: 1716/3165 cut-off events. [2022-11-23 03:51:20,532 INFO L131 PetriNetUnfolder]: For 31030/31071 co-relation queries the response was YES. [2022-11-23 03:51:20,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21186 conditions, 3165 events. 1716/3165 cut-off events. For 31030/31071 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19872 event pairs, 209 based on Foata normal form. 49/3188 useless extension candidates. Maximal degree in co-relation 21114. Up to 1389 conditions per place. [2022-11-23 03:51:20,559 INFO L137 encePairwiseOnDemand]: 280/287 looper letters, 422 selfloop transitions, 247 changer transitions 1/676 dead transitions. [2022-11-23 03:51:20,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 676 transitions, 10925 flow [2022-11-23 03:51:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:51:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:51:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1840 transitions. [2022-11-23 03:51:20,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35617499032133176 [2022-11-23 03:51:20,563 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1840 transitions. [2022-11-23 03:51:20,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1840 transitions. [2022-11-23 03:51:20,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:51:20,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1840 transitions. [2022-11-23 03:51:20,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.22222222222223) internal successors, (1840), 18 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:20,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:20,573 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:20,573 INFO L175 Difference]: Start difference. First operand has 201 places, 504 transitions, 7512 flow. Second operand 18 states and 1840 transitions. [2022-11-23 03:51:20,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 676 transitions, 10925 flow [2022-11-23 03:51:20,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 676 transitions, 9846 flow, removed 513 selfloop flow, removed 9 redundant places. [2022-11-23 03:51:20,815 INFO L231 Difference]: Finished difference. Result has 211 places, 578 transitions, 8338 flow [2022-11-23 03:51:20,815 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8338, PETRI_PLACES=211, PETRI_TRANSITIONS=578} [2022-11-23 03:51:20,816 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 190 predicate places. [2022-11-23 03:51:20,816 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 578 transitions, 8338 flow [2022-11-23 03:51:20,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 99.0) internal successors, (2376), 24 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:20,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:51:20,817 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:51:20,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 03:51:21,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 03:51:21,017 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:51:21,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:51:21,018 INFO L85 PathProgramCache]: Analyzing trace with hash -946301763, now seen corresponding path program 16 times [2022-11-23 03:51:21,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:51:21,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474933403] [2022-11-23 03:51:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:51:21,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:51:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:51:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:22,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:51:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474933403] [2022-11-23 03:51:22,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474933403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:51:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767330138] [2022-11-23 03:51:22,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:51:22,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:51:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:51:22,974 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:51:23,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 03:51:23,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:51:23,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:51:23,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-23 03:51:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:51:24,434 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-23 03:51:24,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 15 [2022-11-23 03:51:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:24,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:51:25,724 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-23 03:51:25,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 99 [2022-11-23 03:51:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:27,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767330138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:51:27,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:51:27,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-11-23 03:51:27,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770476433] [2022-11-23 03:51:27,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:51:27,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 03:51:27,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:51:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 03:51:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 03:51:35,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 287 [2022-11-23 03:51:35,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 578 transitions, 8338 flow. Second operand has 40 states, 40 states have (on average 97.525) internal successors, (3901), 40 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:35,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:51:35,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 287 [2022-11-23 03:51:35,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:51:42,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:51:51,816 INFO L130 PetriNetUnfolder]: 1841/3420 cut-off events. [2022-11-23 03:51:51,816 INFO L131 PetriNetUnfolder]: For 30301/30301 co-relation queries the response was YES. [2022-11-23 03:51:51,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22085 conditions, 3420 events. 1841/3420 cut-off events. For 30301/30301 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21786 event pairs, 379 based on Foata normal form. 2/3379 useless extension candidates. Maximal degree in co-relation 22011. Up to 1504 conditions per place. [2022-11-23 03:51:51,856 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 388 selfloop transitions, 300 changer transitions 10/698 dead transitions. [2022-11-23 03:51:51,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 698 transitions, 10672 flow [2022-11-23 03:51:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 03:51:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-23 03:51:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2337 transitions. [2022-11-23 03:51:51,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35403726708074534 [2022-11-23 03:51:51,864 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2337 transitions. [2022-11-23 03:51:51,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2337 transitions. [2022-11-23 03:51:51,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:51:51,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2337 transitions. [2022-11-23 03:51:51,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 101.6086956521739) internal successors, (2337), 23 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:51,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 287.0) internal successors, (6888), 24 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:51,882 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 287.0) internal successors, (6888), 24 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:51,882 INFO L175 Difference]: Start difference. First operand has 211 places, 578 transitions, 8338 flow. Second operand 23 states and 2337 transitions. [2022-11-23 03:51:51,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 698 transitions, 10672 flow [2022-11-23 03:51:52,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 698 transitions, 10314 flow, removed 91 selfloop flow, removed 10 redundant places. [2022-11-23 03:51:52,224 INFO L231 Difference]: Finished difference. Result has 234 places, 622 transitions, 9748 flow [2022-11-23 03:51:52,225 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9748, PETRI_PLACES=234, PETRI_TRANSITIONS=622} [2022-11-23 03:51:52,226 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2022-11-23 03:51:52,226 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 622 transitions, 9748 flow [2022-11-23 03:51:52,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 97.525) internal successors, (3901), 40 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:51:52,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:51:52,228 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:51:52,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 03:51:52,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 03:51:52,435 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:51:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:51:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1300740141, now seen corresponding path program 17 times [2022-11-23 03:51:52,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:51:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097311472] [2022-11-23 03:51:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:51:52,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:51:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:51:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:54,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:51:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097311472] [2022-11-23 03:51:54,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097311472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:51:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092272814] [2022-11-23 03:51:54,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:51:54,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:51:54,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:51:54,481 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:51:54,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 03:51:54,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 03:51:54,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:51:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-23 03:51:54,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:51:55,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:51:55,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-11-23 03:51:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:55,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:51:56,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:51:56,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 94 [2022-11-23 03:51:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:51:58,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092272814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:51:58,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:51:58,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-11-23 03:51:58,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372266134] [2022-11-23 03:51:58,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:51:58,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 03:51:58,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:51:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 03:51:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 03:52:05,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 287 [2022-11-23 03:52:05,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 622 transitions, 9748 flow. Second operand has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:52:05,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:52:05,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 287 [2022-11-23 03:52:05,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:52:15,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:52:21,295 INFO L130 PetriNetUnfolder]: 2139/3939 cut-off events. [2022-11-23 03:52:21,295 INFO L131 PetriNetUnfolder]: For 40043/40043 co-relation queries the response was YES. [2022-11-23 03:52:21,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27538 conditions, 3939 events. 2139/3939 cut-off events. For 40043/40043 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25721 event pairs, 315 based on Foata normal form. 3/3887 useless extension candidates. Maximal degree in co-relation 27455. Up to 3134 conditions per place. [2022-11-23 03:52:21,348 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 595 selfloop transitions, 223 changer transitions 11/829 dead transitions. [2022-11-23 03:52:21,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 829 transitions, 13813 flow [2022-11-23 03:52:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 03:52:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-23 03:52:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2943 transitions. [2022-11-23 03:52:21,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35359846209299534 [2022-11-23 03:52:21,352 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2943 transitions. [2022-11-23 03:52:21,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2943 transitions. [2022-11-23 03:52:21,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:52:21,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2943 transitions. [2022-11-23 03:52:21,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 101.48275862068965) internal successors, (2943), 29 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:52:21,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 287.0) internal successors, (8610), 30 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:52:21,366 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 287.0) internal successors, (8610), 30 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:52:21,366 INFO L175 Difference]: Start difference. First operand has 234 places, 622 transitions, 9748 flow. Second operand 29 states and 2943 transitions. [2022-11-23 03:52:21,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 829 transitions, 13813 flow [2022-11-23 03:52:21,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 829 transitions, 13630 flow, removed 82 selfloop flow, removed 9 redundant places. [2022-11-23 03:52:21,896 INFO L231 Difference]: Finished difference. Result has 264 places, 740 transitions, 12401 flow [2022-11-23 03:52:21,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=9611, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12401, PETRI_PLACES=264, PETRI_TRANSITIONS=740} [2022-11-23 03:52:21,897 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2022-11-23 03:52:21,897 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 740 transitions, 12401 flow [2022-11-23 03:52:21,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:52:21,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:52:21,898 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:52:21,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:52:22,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:52:22,099 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:52:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:52:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1336295917, now seen corresponding path program 18 times [2022-11-23 03:52:22,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:52:22,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896762107] [2022-11-23 03:52:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:52:22,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:52:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:52:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:52:24,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:52:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896762107] [2022-11-23 03:52:24,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896762107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:52:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194896009] [2022-11-23 03:52:24,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:52:24,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:52:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:52:24,091 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:52:24,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 03:52:24,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 03:52:24,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:52:24,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-23 03:52:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:52:25,372 INFO L321 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2022-11-23 03:52:25,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 24 [2022-11-23 03:52:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:52:25,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:52:26,858 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-23 03:52:26,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 91 [2022-11-23 03:52:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:52:28,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194896009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:52:28,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:52:28,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-11-23 03:52:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963954758] [2022-11-23 03:52:28,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:52:28,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 03:52:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:52:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 03:52:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 03:52:35,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 287 [2022-11-23 03:52:35,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 740 transitions, 12401 flow. Second operand has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:52:35,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:52:35,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 287 [2022-11-23 03:52:35,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:03,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:11,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:24,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:27,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:29,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:32,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:37,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:53:37,829 INFO L130 PetriNetUnfolder]: 2329/4339 cut-off events. [2022-11-23 03:53:37,829 INFO L131 PetriNetUnfolder]: For 52254/52254 co-relation queries the response was YES. [2022-11-23 03:53:37,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32164 conditions, 4339 events. 2329/4339 cut-off events. For 52254/52254 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29441 event pairs, 430 based on Foata normal form. 23/4297 useless extension candidates. Maximal degree in co-relation 32070. Up to 1588 conditions per place. [2022-11-23 03:53:37,868 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 473 selfloop transitions, 468 changer transitions 39/980 dead transitions. [2022-11-23 03:53:37,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 980 transitions, 16848 flow [2022-11-23 03:53:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-23 03:53:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-23 03:53:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4075 transitions. [2022-11-23 03:53:37,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3549651567944251 [2022-11-23 03:53:37,875 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4075 transitions. [2022-11-23 03:53:37,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4075 transitions. [2022-11-23 03:53:37,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:37,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4075 transitions. [2022-11-23 03:53:37,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 101.875) internal successors, (4075), 40 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:37,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 287.0) internal successors, (11767), 41 states have internal predecessors, (11767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:37,895 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 287.0) internal successors, (11767), 41 states have internal predecessors, (11767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:37,895 INFO L175 Difference]: Start difference. First operand has 264 places, 740 transitions, 12401 flow. Second operand 40 states and 4075 transitions. [2022-11-23 03:53:37,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 980 transitions, 16848 flow [2022-11-23 03:53:38,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 980 transitions, 16354 flow, removed 225 selfloop flow, removed 12 redundant places. [2022-11-23 03:53:38,538 INFO L231 Difference]: Finished difference. Result has 308 places, 840 transitions, 15278 flow [2022-11-23 03:53:38,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=11986, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=15278, PETRI_PLACES=308, PETRI_TRANSITIONS=840} [2022-11-23 03:53:38,539 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2022-11-23 03:53:38,539 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 840 transitions, 15278 flow [2022-11-23 03:53:38,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:38,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:38,540 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:53:38,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:38,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 03:53:38,753 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:53:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:38,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2020258401, now seen corresponding path program 19 times [2022-11-23 03:53:38,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:53:38,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370334779] [2022-11-23 03:53:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:38,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:53:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:40,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:53:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370334779] [2022-11-23 03:53:40,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370334779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:53:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791602066] [2022-11-23 03:53:40,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:53:40,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:53:40,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:53:40,608 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:53:40,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 03:53:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:40,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 03:53:40,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:41,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:53:41,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-11-23 03:53:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:53:41,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:53:42,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:53:42,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 91 [2022-11-23 03:53:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 03:53:43,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791602066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:53:43,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:53:43,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2022-11-23 03:53:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910886299] [2022-11-23 03:53:43,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:53:43,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 03:53:43,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:53:43,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 03:53:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 03:53:50,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:53:51,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 287 [2022-11-23 03:53:51,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 840 transitions, 15278 flow. Second operand has 35 states, 35 states have (on average 98.74285714285715) internal successors, (3456), 35 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:51,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:51,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 287 [2022-11-23 03:53:51,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:56,577 INFO L130 PetriNetUnfolder]: 2320/4299 cut-off events. [2022-11-23 03:53:56,577 INFO L131 PetriNetUnfolder]: For 56925/56925 co-relation queries the response was YES. [2022-11-23 03:53:56,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34018 conditions, 4299 events. 2320/4299 cut-off events. For 56925/56925 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28861 event pairs, 496 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 33907. Up to 3898 conditions per place. [2022-11-23 03:53:56,625 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 759 selfloop transitions, 113 changer transitions 23/895 dead transitions. [2022-11-23 03:53:56,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 895 transitions, 17326 flow [2022-11-23 03:53:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 03:53:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-23 03:53:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2540 transitions. [2022-11-23 03:53:56,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35400696864111497 [2022-11-23 03:53:56,633 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2540 transitions. [2022-11-23 03:53:56,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2540 transitions. [2022-11-23 03:53:56,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:56,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2540 transitions. [2022-11-23 03:53:56,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 101.6) internal successors, (2540), 25 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:56,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 287.0) internal successors, (7462), 26 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:56,645 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 287.0) internal successors, (7462), 26 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:56,645 INFO L175 Difference]: Start difference. First operand has 308 places, 840 transitions, 15278 flow. Second operand 25 states and 2540 transitions. [2022-11-23 03:53:56,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 895 transitions, 17326 flow [2022-11-23 03:53:57,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 895 transitions, 16885 flow, removed 197 selfloop flow, removed 16 redundant places. [2022-11-23 03:53:57,595 INFO L231 Difference]: Finished difference. Result has 313 places, 840 transitions, 15082 flow [2022-11-23 03:53:57,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=14843, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15082, PETRI_PLACES=313, PETRI_TRANSITIONS=840} [2022-11-23 03:53:57,596 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2022-11-23 03:53:57,596 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 840 transitions, 15082 flow [2022-11-23 03:53:57,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 98.74285714285715) internal successors, (3456), 35 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:57,597 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:57,597 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:53:57,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-23 03:53:57,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 03:53:57,805 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:53:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1817589511, now seen corresponding path program 20 times [2022-11-23 03:53:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:53:57,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145730564] [2022-11-23 03:53:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:57,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:53:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:59,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:53:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145730564] [2022-11-23 03:53:59,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145730564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:53:59,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524511651] [2022-11-23 03:53:59,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:53:59,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:53:59,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:53:59,872 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:53:59,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 03:54:00,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:54:00,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:54:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-23 03:54:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:01,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:54:01,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 12 [2022-11-23 03:54:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:54:01,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:54:02,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:54:02,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 91 [2022-11-23 03:54:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:54:03,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524511651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:54:03,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:54:03,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-11-23 03:54:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036167964] [2022-11-23 03:54:03,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:54:03,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 03:54:03,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:54:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 03:54:03,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 03:54:09,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 287 [2022-11-23 03:54:09,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 840 transitions, 15082 flow. Second operand has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:09,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:09,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 287 [2022-11-23 03:54:09,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:15,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:54:20,559 INFO L130 PetriNetUnfolder]: 2471/4569 cut-off events. [2022-11-23 03:54:20,559 INFO L131 PetriNetUnfolder]: For 51331/51331 co-relation queries the response was YES. [2022-11-23 03:54:20,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35190 conditions, 4569 events. 2471/4569 cut-off events. For 51331/51331 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31074 event pairs, 376 based on Foata normal form. 3/4523 useless extension candidates. Maximal degree in co-relation 35081. Up to 3914 conditions per place. [2022-11-23 03:54:20,604 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 761 selfloop transitions, 211 changer transitions 11/983 dead transitions. [2022-11-23 03:54:20,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 983 transitions, 18759 flow [2022-11-23 03:54:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 03:54:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 03:54:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2733 transitions. [2022-11-23 03:54:20,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3526906697638405 [2022-11-23 03:54:20,608 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2733 transitions. [2022-11-23 03:54:20,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2733 transitions. [2022-11-23 03:54:20,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:20,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2733 transitions. [2022-11-23 03:54:20,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 101.22222222222223) internal successors, (2733), 27 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:20,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 287.0) internal successors, (8036), 28 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:20,617 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 287.0) internal successors, (8036), 28 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:20,617 INFO L175 Difference]: Start difference. First operand has 313 places, 840 transitions, 15082 flow. Second operand 27 states and 2733 transitions. [2022-11-23 03:54:20,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 983 transitions, 18759 flow [2022-11-23 03:54:21,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 983 transitions, 18464 flow, removed 20 selfloop flow, removed 16 redundant places. [2022-11-23 03:54:21,465 INFO L231 Difference]: Finished difference. Result has 327 places, 910 transitions, 16913 flow [2022-11-23 03:54:21,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=14825, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=16913, PETRI_PLACES=327, PETRI_TRANSITIONS=910} [2022-11-23 03:54:21,467 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 306 predicate places. [2022-11-23 03:54:21,467 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 910 transitions, 16913 flow [2022-11-23 03:54:21,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:21,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:21,469 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:21,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 03:54:21,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 03:54:21,671 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:54:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:21,671 INFO L85 PathProgramCache]: Analyzing trace with hash -779169321, now seen corresponding path program 21 times [2022-11-23 03:54:21,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:54:21,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057176092] [2022-11-23 03:54:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:54:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:54:23,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:54:23,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057176092] [2022-11-23 03:54:23,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057176092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:54:23,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078811611] [2022-11-23 03:54:23,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:54:23,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:54:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:54:23,356 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:54:23,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 03:54:23,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:54:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:54:23,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 03:54:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:24,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:54:24,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-11-23 03:54:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:54:24,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:54:25,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:54:25,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 91 [2022-11-23 03:54:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 03:54:25,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078811611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:54:25,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:54:25,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2022-11-23 03:54:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714631106] [2022-11-23 03:54:25,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:54:25,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 03:54:25,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:54:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 03:54:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 03:54:33,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 287 [2022-11-23 03:54:33,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 910 transitions, 16913 flow. Second operand has 35 states, 35 states have (on average 98.74285714285715) internal successors, (3456), 35 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:33,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:33,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 287 [2022-11-23 03:54:33,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:41,843 INFO L130 PetriNetUnfolder]: 2565/4764 cut-off events. [2022-11-23 03:54:41,844 INFO L131 PetriNetUnfolder]: For 56221/56221 co-relation queries the response was YES. [2022-11-23 03:54:41,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37601 conditions, 4764 events. 2565/4764 cut-off events. For 56221/56221 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32843 event pairs, 535 based on Foata normal form. 10/4721 useless extension candidates. Maximal degree in co-relation 37485. Up to 4302 conditions per place. [2022-11-23 03:54:41,896 INFO L137 encePairwiseOnDemand]: 276/287 looper letters, 857 selfloop transitions, 148 changer transitions 36/1041 dead transitions. [2022-11-23 03:54:41,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1041 transitions, 20571 flow [2022-11-23 03:54:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 03:54:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-23 03:54:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4136 transitions. [2022-11-23 03:54:41,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35149145916546276 [2022-11-23 03:54:41,903 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4136 transitions. [2022-11-23 03:54:41,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4136 transitions. [2022-11-23 03:54:41,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:41,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4136 transitions. [2022-11-23 03:54:41,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 100.8780487804878) internal successors, (4136), 41 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:41,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 287.0) internal successors, (12054), 42 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:41,924 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 287.0) internal successors, (12054), 42 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:41,925 INFO L175 Difference]: Start difference. First operand has 327 places, 910 transitions, 16913 flow. Second operand 41 states and 4136 transitions. [2022-11-23 03:54:41,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1041 transitions, 20571 flow [2022-11-23 03:54:42,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1041 transitions, 20308 flow, removed 53 selfloop flow, removed 13 redundant places. [2022-11-23 03:54:42,957 INFO L231 Difference]: Finished difference. Result has 369 places, 961 transitions, 18261 flow [2022-11-23 03:54:42,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=16662, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=18261, PETRI_PLACES=369, PETRI_TRANSITIONS=961} [2022-11-23 03:54:42,959 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 348 predicate places. [2022-11-23 03:54:42,960 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 961 transitions, 18261 flow [2022-11-23 03:54:42,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 98.74285714285715) internal successors, (3456), 35 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:42,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:42,961 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:42,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 03:54:43,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:54:43,168 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:54:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash 159243657, now seen corresponding path program 22 times [2022-11-23 03:54:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:54:43,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986501992] [2022-11-23 03:54:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:43,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:54:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:54:45,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:54:45,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986501992] [2022-11-23 03:54:45,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986501992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:54:45,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057670279] [2022-11-23 03:54:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:54:45,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:54:45,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:54:45,058 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:54:45,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad52725-7b4b-488a-bbe7-b7fdca987990/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 03:54:45,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:54:45,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:54:45,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 03:54:45,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:45,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:54:45,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:54:45,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:54:45,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:54:45,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:54:46,710 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-23 03:54:46,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 15 [2022-11-23 03:54:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:54:46,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:55:03,085 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:55:03,481 INFO L321 Elim1Store]: treesize reduction 204, result has 47.8 percent of original size [2022-11-23 03:55:03,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 521 treesize of output 475 [2022-11-23 03:55:03,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 884 treesize of output 855 [2022-11-23 03:55:03,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:03,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 808 treesize of output 797 [2022-11-23 03:55:03,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:03,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 831 treesize of output 879 [2022-11-23 03:55:03,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:03,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 772 treesize of output 773 [2022-11-23 03:55:03,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:03,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 807 treesize of output 921 [2022-11-23 03:55:04,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:04,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1220 treesize of output 1314 [2022-11-23 03:55:04,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:04,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1103 treesize of output 1118 [2022-11-23 03:55:04,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:04,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1053 treesize of output 1018 [2022-11-23 03:55:04,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:04,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 953 treesize of output 968 [2022-11-23 03:55:04,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:55:04,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 903 treesize of output 868