./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:02:31,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:02:31,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:02:31,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:02:31,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:02:31,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:02:31,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:02:31,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:02:31,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:02:31,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:02:31,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:02:31,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:02:31,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:02:31,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:02:31,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:02:31,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:02:31,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:02:31,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:02:31,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:02:31,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:02:31,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:02:31,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:02:31,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:02:31,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:02:31,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:02:31,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:02:31,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:02:31,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:02:31,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:02:31,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:02:31,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:02:31,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:02:31,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:02:31,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:02:31,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:02:31,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:02:31,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:02:31,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:02:31,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:02:31,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:02:31,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:02:31,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:02:31,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:02:31,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:02:31,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:02:31,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:02:31,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:02:31,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:02:31,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:02:31,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:02:31,181 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:02:31,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:02:31,181 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:02:31,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:02:31,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:02:31,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:02:31,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:02:31,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:02:31,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:02:31,182 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:02:31,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:02:31,183 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:02:31,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:02:31,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:02:31,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:02:31,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:02:31,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:02:31,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:02:31,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:02:31,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:02:31,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:02:31,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:02:31,192 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:02:31,192 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:02:31,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:02:31,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-11-16 12:02:31,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:02:31,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:02:31,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:02:31,583 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:02:31,583 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:02:31,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-16 12:02:31,679 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/data/c35f77cbe/aa9852ac2c0b4c27a3ffbc6e570d8c91/FLAG427d5b999 [2022-11-16 12:02:32,350 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:02:32,351 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-16 12:02:32,363 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/data/c35f77cbe/aa9852ac2c0b4c27a3ffbc6e570d8c91/FLAG427d5b999 [2022-11-16 12:02:32,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/data/c35f77cbe/aa9852ac2c0b4c27a3ffbc6e570d8c91 [2022-11-16 12:02:32,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:02:32,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:02:32,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:02:32,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:02:32,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:02:32,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:32" (1/1) ... [2022-11-16 12:02:32,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3c1d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:32, skipping insertion in model container [2022-11-16 12:02:32,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:32" (1/1) ... [2022-11-16 12:02:32,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:02:32,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:02:33,004 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-16 12:02:33,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:02:33,031 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:02:33,068 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-16 12:02:33,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:02:33,101 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:02:33,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33 WrapperNode [2022-11-16 12:02:33,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:02:33,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:02:33,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:02:33,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:02:33,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,154 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-11-16 12:02:33,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:02:33,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:02:33,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:02:33,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:02:33,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,217 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:02:33,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:02:33,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:02:33,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:02:33,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (1/1) ... [2022-11-16 12:02:33,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:02:33,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:33,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:02:33,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:02:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:02:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:02:33,341 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:02:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:02:33,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:02:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:02:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:02:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:02:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:02:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:02:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:02:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:02:33,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:02:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:02:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:02:33,353 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:02:33,540 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:02:33,543 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:02:33,874 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:02:34,020 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:02:34,020 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:02:34,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:34 BoogieIcfgContainer [2022-11-16 12:02:34,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:02:34,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:02:34,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:02:34,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:02:34,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:02:32" (1/3) ... [2022-11-16 12:02:34,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a1d0ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:02:34, skipping insertion in model container [2022-11-16 12:02:34,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:33" (2/3) ... [2022-11-16 12:02:34,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a1d0ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:02:34, skipping insertion in model container [2022-11-16 12:02:34,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:34" (3/3) ... [2022-11-16 12:02:34,037 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-11-16 12:02:34,049 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:02:34,060 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:02:34,061 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:02:34,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:02:34,172 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:02:34,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-11-16 12:02:34,324 INFO L130 PetriNetUnfolder]: 9/118 cut-off events. [2022-11-16 12:02:34,329 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:02:34,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-16 12:02:34,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-11-16 12:02:34,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-11-16 12:02:34,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:02:34,379 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;@70823841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:02:34,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:02:34,440 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2022-11-16 12:02:34,440 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:02:34,440 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:34,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:34,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:34,451 INFO L85 PathProgramCache]: Analyzing trace with hash 30984578, now seen corresponding path program 1 times [2022-11-16 12:02:34,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:34,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623466314] [2022-11-16 12:02:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:34,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:34,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623466314] [2022-11-16 12:02:34,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623466314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:34,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:34,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:02:34,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908971862] [2022-11-16 12:02:34,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:34,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:02:34,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:02:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:02:34,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-11-16 12:02:34,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:34,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-11-16 12:02:34,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:34,861 INFO L130 PetriNetUnfolder]: 5/105 cut-off events. [2022-11-16 12:02:34,861 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 12:02:34,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 105 events. 5/105 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-11-16 12:02:34,864 INFO L137 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-11-16 12:02:34,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-11-16 12:02:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:02:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:02:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-11-16 12:02:34,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-11-16 12:02:34,887 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-11-16 12:02:34,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-11-16 12:02:34,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:34,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-11-16 12:02:34,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,909 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,911 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-11-16 12:02:34,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-11-16 12:02:34,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:02:34,926 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-11-16 12:02:34,928 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-11-16 12:02:34,933 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-11-16 12:02:34,933 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-11-16 12:02:34,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:34,935 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:02:34,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1021785823, now seen corresponding path program 1 times [2022-11-16 12:02:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:34,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443216888] [2022-11-16 12:02:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:35,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:35,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443216888] [2022-11-16 12:02:35,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443216888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:35,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:35,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475034928] [2022-11-16 12:02:35,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:35,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:35,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-11-16 12:02:35,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:35,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-11-16 12:02:35,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:35,619 INFO L130 PetriNetUnfolder]: 7/120 cut-off events. [2022-11-16 12:02:35,620 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:02:35,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-11-16 12:02:35,624 INFO L137 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-11-16 12:02:35,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-11-16 12:02:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:02:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:02:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-11-16 12:02:35,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-11-16 12:02:35,632 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-11-16 12:02:35,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-11-16 12:02:35,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:35,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-11-16 12:02:35,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,641 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,641 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-11-16 12:02:35,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-11-16 12:02:35,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:02:35,645 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-11-16 12:02:35,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-11-16 12:02:35,646 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-11-16 12:02:35,647 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-11-16 12:02:35,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:35,648 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:35,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:02:35,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2102975193, now seen corresponding path program 1 times [2022-11-16 12:02:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:35,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468206137] [2022-11-16 12:02:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:35,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:35,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:35,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468206137] [2022-11-16 12:02:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468206137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:35,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:35,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:02:35,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686087740] [2022-11-16 12:02:35,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:02:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:02:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:02:35,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-11-16 12:02:35,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:35,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-11-16 12:02:35,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:35,994 INFO L130 PetriNetUnfolder]: 8/142 cut-off events. [2022-11-16 12:02:35,994 INFO L131 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-11-16 12:02:35,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 142 events. 8/142 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 1 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 177. Up to 18 conditions per place. [2022-11-16 12:02:35,996 INFO L137 encePairwiseOnDemand]: 117/120 looper letters, 11 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2022-11-16 12:02:35,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 261 flow [2022-11-16 12:02:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:02:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:02:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-11-16 12:02:35,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-16 12:02:35,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-11-16 12:02:35,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-11-16 12:02:35,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:35,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-11-16 12:02:36,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,002 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 324 transitions. [2022-11-16 12:02:36,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 261 flow [2022-11-16 12:02:36,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 255 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 12:02:36,009 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 226 flow [2022-11-16 12:02:36,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-11-16 12:02:36,013 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-11-16 12:02:36,013 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 226 flow [2022-11-16 12:02:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:36,014 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:36,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:02:36,015 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash -109199569, now seen corresponding path program 1 times [2022-11-16 12:02:36,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:36,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873883219] [2022-11-16 12:02:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:36,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:36,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:36,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873883219] [2022-11-16 12:02:36,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873883219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:36,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:36,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:02:36,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490822262] [2022-11-16 12:02:36,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:36,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:02:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:02:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:02:36,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-11-16 12:02:36,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:36,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-11-16 12:02:36,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:36,559 INFO L130 PetriNetUnfolder]: 8/185 cut-off events. [2022-11-16 12:02:36,560 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-16 12:02:36,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 185 events. 8/185 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 363 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 247. Up to 28 conditions per place. [2022-11-16 12:02:36,563 INFO L137 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-11-16 12:02:36,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 310 flow [2022-11-16 12:02:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:02:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:02:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-11-16 12:02:36,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-11-16 12:02:36,568 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-11-16 12:02:36,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-11-16 12:02:36,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:36,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-11-16 12:02:36,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,580 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,580 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 226 flow. Second operand 7 states and 681 transitions. [2022-11-16 12:02:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 310 flow [2022-11-16 12:02:36,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:02:36,589 INFO L231 Difference]: Finished difference. Result has 113 places, 103 transitions, 246 flow [2022-11-16 12:02:36,589 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2022-11-16 12:02:36,591 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-11-16 12:02:36,597 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 246 flow [2022-11-16 12:02:36,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:36,599 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:36,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:02:36,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash 331191088, now seen corresponding path program 1 times [2022-11-16 12:02:36,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:36,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085678329] [2022-11-16 12:02:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:36,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:38,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:38,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085678329] [2022-11-16 12:02:38,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085678329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:38,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344959909] [2022-11-16 12:02:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:38,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:38,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:38,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:38,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:02:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 12:02:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:38,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:02:38,439 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:02:38,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-16 12:02:39,066 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:02:39,066 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 15 treesize of output 15 [2022-11-16 12:02:39,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:02:39,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:02:39,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:02:40,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 12:02:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:40,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:41,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:02:41,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-16 12:02:41,708 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:02:41,708 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 140 treesize of output 131 [2022-11-16 12:02:41,727 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 12:02:41,727 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 124 treesize of output 100 [2022-11-16 12:02:41,742 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 12:02:41,745 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 79 treesize of output 67 [2022-11-16 12:02:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:42,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344959909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:42,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:42,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 50 [2022-11-16 12:02:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461321049] [2022-11-16 12:02:42,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:42,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 12:02:42,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 12:02:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1994, Unknown=23, NotChecked=0, Total=2450 [2022-11-16 12:02:42,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-16 12:02:42,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 246 flow. Second operand has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:42,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:42,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-16 12:02:42,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:47,219 INFO L130 PetriNetUnfolder]: 106/738 cut-off events. [2022-11-16 12:02:47,219 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-16 12:02:47,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 738 events. 106/738 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4551 event pairs, 0 based on Foata normal form. 4/688 useless extension candidates. Maximal degree in co-relation 1242. Up to 87 conditions per place. [2022-11-16 12:02:47,226 INFO L137 encePairwiseOnDemand]: 94/120 looper letters, 129 selfloop transitions, 51 changer transitions 27/249 dead transitions. [2022-11-16 12:02:47,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 249 transitions, 1086 flow [2022-11-16 12:02:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 12:02:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-16 12:02:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2272 transitions. [2022-11-16 12:02:47,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44031007751937984 [2022-11-16 12:02:47,236 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2272 transitions. [2022-11-16 12:02:47,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2272 transitions. [2022-11-16 12:02:47,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:47,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2272 transitions. [2022-11-16 12:02:47,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 52.83720930232558) internal successors, (2272), 43 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) [2022-11-16 12:02:47,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:47,258 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:47,258 INFO L175 Difference]: Start difference. First operand has 113 places, 103 transitions, 246 flow. Second operand 43 states and 2272 transitions. [2022-11-16 12:02:47,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 249 transitions, 1086 flow [2022-11-16 12:02:47,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 249 transitions, 1072 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-16 12:02:47,266 INFO L231 Difference]: Finished difference. Result has 168 places, 145 transitions, 594 flow [2022-11-16 12:02:47,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=594, PETRI_PLACES=168, PETRI_TRANSITIONS=145} [2022-11-16 12:02:47,267 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 61 predicate places. [2022-11-16 12:02:47,267 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 145 transitions, 594 flow [2022-11-16 12:02:47,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:47,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:47,269 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:47,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:02:47,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:47,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash -523597338, now seen corresponding path program 2 times [2022-11-16 12:02:47,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:47,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881055383] [2022-11-16 12:02:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:47,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:49,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:49,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881055383] [2022-11-16 12:02:49,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881055383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:49,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954883288] [2022-11-16 12:02:49,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:02:49,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:49,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:49,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:49,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:02:49,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:49,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 12:02:49,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:49,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:02:50,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:02:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:02:50,520 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 [2022-11-16 12:02:50,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 12:02:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:50,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:52,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:02:52,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 12:02:52,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:02:52,068 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 100 treesize of output 96 [2022-11-16 12:02:52,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-11-16 12:02:52,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:02:52,094 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 51 treesize of output 51 [2022-11-16 12:02:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:53,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954883288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:53,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:53,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 55 [2022-11-16 12:02:53,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124765544] [2022-11-16 12:02:53,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:53,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 12:02:53,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:53,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 12:02:53,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2732, Unknown=19, NotChecked=0, Total=2970 [2022-11-16 12:02:53,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-16 12:02:53,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 145 transitions, 594 flow. Second operand has 55 states, 55 states have (on average 50.527272727272724) internal successors, (2779), 55 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:53,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:53,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-16 12:02:53,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:00,846 INFO L130 PetriNetUnfolder]: 173/1172 cut-off events. [2022-11-16 12:03:00,846 INFO L131 PetriNetUnfolder]: For 1124/1128 co-relation queries the response was YES. [2022-11-16 12:03:00,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 1172 events. 173/1172 cut-off events. For 1124/1128 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8769 event pairs, 2 based on Foata normal form. 8/1086 useless extension candidates. Maximal degree in co-relation 2363. Up to 135 conditions per place. [2022-11-16 12:03:00,859 INFO L137 encePairwiseOnDemand]: 93/120 looper letters, 134 selfloop transitions, 63 changer transitions 23/262 dead transitions. [2022-11-16 12:03:00,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 262 transitions, 1572 flow [2022-11-16 12:03:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 12:03:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-16 12:03:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2392 transitions. [2022-11-16 12:03:00,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-11-16 12:03:00,872 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2392 transitions. [2022-11-16 12:03:00,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2392 transitions. [2022-11-16 12:03:00,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:00,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2392 transitions. [2022-11-16 12:03:00,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.0) internal successors, (2392), 46 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:00,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 120.0) internal successors, (5640), 47 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:00,896 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 120.0) internal successors, (5640), 47 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:00,897 INFO L175 Difference]: Start difference. First operand has 168 places, 145 transitions, 594 flow. Second operand 46 states and 2392 transitions. [2022-11-16 12:03:00,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 262 transitions, 1572 flow [2022-11-16 12:03:00,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 262 transitions, 1365 flow, removed 89 selfloop flow, removed 21 redundant places. [2022-11-16 12:03:00,914 INFO L231 Difference]: Finished difference. Result has 196 places, 164 transitions, 811 flow [2022-11-16 12:03:00,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=811, PETRI_PLACES=196, PETRI_TRANSITIONS=164} [2022-11-16 12:03:00,917 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 89 predicate places. [2022-11-16 12:03:00,918 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 164 transitions, 811 flow [2022-11-16 12:03:00,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 50.527272727272724) internal successors, (2779), 55 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:00,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:00,919 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:00,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:01,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:01,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:01,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:01,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1518225528, now seen corresponding path program 3 times [2022-11-16 12:03:01,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:01,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434371267] [2022-11-16 12:03:01,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:01,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:03:01,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:01,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434371267] [2022-11-16 12:03:01,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434371267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:01,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351088684] [2022-11-16 12:03:01,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:03:01,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:01,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:01,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:01,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:03:01,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:03:01,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:01,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:03:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:03:01,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:03:01,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351088684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:01,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:01,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 17 [2022-11-16 12:03:01,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967000904] [2022-11-16 12:03:01,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:01,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:03:01,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:03:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:03:01,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-11-16 12:03:01,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 164 transitions, 811 flow. Second operand has 17 states, 17 states have (on average 91.58823529411765) internal successors, (1557), 17 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:01,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:01,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-11-16 12:03:01,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:02,388 INFO L130 PetriNetUnfolder]: 53/681 cut-off events. [2022-11-16 12:03:02,388 INFO L131 PetriNetUnfolder]: For 824/827 co-relation queries the response was YES. [2022-11-16 12:03:02,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 681 events. 53/681 cut-off events. For 824/827 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4329 event pairs, 5 based on Foata normal form. 23/655 useless extension candidates. Maximal degree in co-relation 1247. Up to 51 conditions per place. [2022-11-16 12:03:02,393 INFO L137 encePairwiseOnDemand]: 105/120 looper letters, 35 selfloop transitions, 29 changer transitions 34/175 dead transitions. [2022-11-16 12:03:02,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 175 transitions, 943 flow [2022-11-16 12:03:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:03:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:03:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1740 transitions. [2022-11-16 12:03:02,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7631578947368421 [2022-11-16 12:03:02,397 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1740 transitions. [2022-11-16 12:03:02,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1740 transitions. [2022-11-16 12:03:02,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:02,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1740 transitions. [2022-11-16 12:03:02,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 91.57894736842105) internal successors, (1740), 19 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:02,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:02,408 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:02,408 INFO L175 Difference]: Start difference. First operand has 196 places, 164 transitions, 811 flow. Second operand 19 states and 1740 transitions. [2022-11-16 12:03:02,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 175 transitions, 943 flow [2022-11-16 12:03:02,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 175 transitions, 822 flow, removed 22 selfloop flow, removed 37 redundant places. [2022-11-16 12:03:02,416 INFO L231 Difference]: Finished difference. Result has 167 places, 131 transitions, 574 flow [2022-11-16 12:03:02,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=574, PETRI_PLACES=167, PETRI_TRANSITIONS=131} [2022-11-16 12:03:02,418 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 60 predicate places. [2022-11-16 12:03:02,418 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 131 transitions, 574 flow [2022-11-16 12:03:02,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 91.58823529411765) internal successors, (1557), 17 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:02,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:02,419 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:02,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:02,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:02,639 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash -95330557, now seen corresponding path program 4 times [2022-11-16 12:03:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:02,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495332965] [2022-11-16 12:03:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:04,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:04,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495332965] [2022-11-16 12:03:04,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495332965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:04,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692627988] [2022-11-16 12:03:04,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:03:04,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:04,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:04,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:04,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:03:04,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:03:04,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:04,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:03:04,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:05,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 12:03:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:05,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:05,696 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-16 12:03:05,697 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 25 treesize of output 17 [2022-11-16 12:03:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:06,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692627988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:06,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:06,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-11-16 12:03:06,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262547267] [2022-11-16 12:03:06,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:06,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 12:03:06,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 12:03:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:03:06,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-16 12:03:06,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 131 transitions, 574 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:06,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:06,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-16 12:03:06,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:13,859 INFO L130 PetriNetUnfolder]: 417/2700 cut-off events. [2022-11-16 12:03:13,859 INFO L131 PetriNetUnfolder]: For 4540/4545 co-relation queries the response was YES. [2022-11-16 12:03:13,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 2700 events. 417/2700 cut-off events. For 4540/4545 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 26680 event pairs, 1 based on Foata normal form. 28/2510 useless extension candidates. Maximal degree in co-relation 6113. Up to 392 conditions per place. [2022-11-16 12:03:13,879 INFO L137 encePairwiseOnDemand]: 94/120 looper letters, 220 selfloop transitions, 135 changer transitions 89/492 dead transitions. [2022-11-16 12:03:13,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 492 transitions, 3357 flow [2022-11-16 12:03:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-16 12:03:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-16 12:03:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5386 transitions. [2022-11-16 12:03:13,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5218992248062015 [2022-11-16 12:03:13,937 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5386 transitions. [2022-11-16 12:03:13,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5386 transitions. [2022-11-16 12:03:13,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:13,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5386 transitions. [2022-11-16 12:03:13,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 62.627906976744185) internal successors, (5386), 86 states have internal predecessors, (5386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:13,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 120.0) internal successors, (10440), 87 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:13,979 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 120.0) internal successors, (10440), 87 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:13,979 INFO L175 Difference]: Start difference. First operand has 167 places, 131 transitions, 574 flow. Second operand 86 states and 5386 transitions. [2022-11-16 12:03:13,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 492 transitions, 3357 flow [2022-11-16 12:03:13,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 492 transitions, 3187 flow, removed 66 selfloop flow, removed 14 redundant places. [2022-11-16 12:03:14,001 INFO L231 Difference]: Finished difference. Result has 267 places, 245 transitions, 2068 flow [2022-11-16 12:03:14,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=2068, PETRI_PLACES=267, PETRI_TRANSITIONS=245} [2022-11-16 12:03:14,002 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 160 predicate places. [2022-11-16 12:03:14,002 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 245 transitions, 2068 flow [2022-11-16 12:03:14,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:14,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:14,005 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:14,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:14,210 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash 277655371, now seen corresponding path program 5 times [2022-11-16 12:03:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:14,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082400292] [2022-11-16 12:03:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:16,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:16,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082400292] [2022-11-16 12:03:16,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082400292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:16,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824926298] [2022-11-16 12:03:16,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:03:16,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:16,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:16,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:16,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:03:16,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:03:16,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:03:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:16,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:03:16,366 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:03:16,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-16 12:03:16,917 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:03:16,918 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 15 treesize of output 15 [2022-11-16 12:03:17,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:03:17,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:03:18,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:18,336 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 [2022-11-16 12:03:18,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:03:18,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:18,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-16 12:03:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:18,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:20,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:20,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2022-11-16 12:03:20,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:20,538 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 186 treesize of output 174 [2022-11-16 12:03:20,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:20,567 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 93 treesize of output 87 [2022-11-16 12:03:20,576 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 122 treesize of output 94 [2022-11-16 12:03:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:23,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824926298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:23,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:23,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 66 [2022-11-16 12:03:23,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163454505] [2022-11-16 12:03:23,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:23,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-16 12:03:23,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-16 12:03:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3967, Unknown=14, NotChecked=0, Total=4290 [2022-11-16 12:03:23,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-16 12:03:23,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 245 transitions, 2068 flow. Second operand has 66 states, 66 states have (on average 50.42424242424242) internal successors, (3328), 66 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:23,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:23,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-16 12:03:23,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:29,276 INFO L130 PetriNetUnfolder]: 550/3496 cut-off events. [2022-11-16 12:03:29,276 INFO L131 PetriNetUnfolder]: For 15592/15614 co-relation queries the response was YES. [2022-11-16 12:03:29,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 3496 events. 550/3496 cut-off events. For 15592/15614 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 36954 event pairs, 12 based on Foata normal form. 20/3209 useless extension candidates. Maximal degree in co-relation 9403. Up to 547 conditions per place. [2022-11-16 12:03:29,332 INFO L137 encePairwiseOnDemand]: 91/120 looper letters, 208 selfloop transitions, 95 changer transitions 17/362 dead transitions. [2022-11-16 12:03:29,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 362 transitions, 3694 flow [2022-11-16 12:03:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:03:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-16 12:03:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1780 transitions. [2022-11-16 12:03:29,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4362745098039216 [2022-11-16 12:03:29,338 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1780 transitions. [2022-11-16 12:03:29,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1780 transitions. [2022-11-16 12:03:29,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:29,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1780 transitions. [2022-11-16 12:03:29,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.35294117647059) internal successors, (1780), 34 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:29,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 120.0) internal successors, (4200), 35 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:29,353 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 120.0) internal successors, (4200), 35 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:29,353 INFO L175 Difference]: Start difference. First operand has 267 places, 245 transitions, 2068 flow. Second operand 34 states and 1780 transitions. [2022-11-16 12:03:29,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 362 transitions, 3694 flow [2022-11-16 12:03:29,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 362 transitions, 3051 flow, removed 309 selfloop flow, removed 37 redundant places. [2022-11-16 12:03:29,444 INFO L231 Difference]: Finished difference. Result has 243 places, 273 transitions, 2228 flow [2022-11-16 12:03:29,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2228, PETRI_PLACES=243, PETRI_TRANSITIONS=273} [2022-11-16 12:03:29,447 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 136 predicate places. [2022-11-16 12:03:29,447 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 273 transitions, 2228 flow [2022-11-16 12:03:29,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 50.42424242424242) internal successors, (3328), 66 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:29,448 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:29,449 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:29,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:29,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash -826338457, now seen corresponding path program 6 times [2022-11-16 12:03:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:29,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825687966] [2022-11-16 12:03:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:29,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:31,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:31,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825687966] [2022-11-16 12:03:31,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825687966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:31,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452088363] [2022-11-16 12:03:31,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:03:31,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:31,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:31,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:31,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:03:31,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:03:31,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 12:03:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:32,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:03:32,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:03:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:33,314 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 [2022-11-16 12:03:33,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 12:03:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:33,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:35,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:35,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2022-11-16 12:03:35,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:35,507 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 106 treesize of output 100 [2022-11-16 12:03:35,515 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 63 treesize of output 49 [2022-11-16 12:03:35,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:35,535 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 53 treesize of output 51 [2022-11-16 12:03:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:37,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452088363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:37,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:37,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 67 [2022-11-16 12:03:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222524576] [2022-11-16 12:03:37,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-16 12:03:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-16 12:03:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=4125, Unknown=6, NotChecked=0, Total=4422 [2022-11-16 12:03:37,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-16 12:03:37,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 273 transitions, 2228 flow. Second operand has 67 states, 67 states have (on average 50.38805970149254) internal successors, (3376), 67 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:37,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:37,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-16 12:03:37,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:47,755 INFO L130 PetriNetUnfolder]: 400/2825 cut-off events. [2022-11-16 12:03:47,755 INFO L131 PetriNetUnfolder]: For 9297/9320 co-relation queries the response was YES. [2022-11-16 12:03:47,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7107 conditions, 2825 events. 400/2825 cut-off events. For 9297/9320 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28643 event pairs, 6 based on Foata normal form. 71/2646 useless extension candidates. Maximal degree in co-relation 7066. Up to 339 conditions per place. [2022-11-16 12:03:47,777 INFO L137 encePairwiseOnDemand]: 88/120 looper letters, 102 selfloop transitions, 83 changer transitions 129/356 dead transitions. [2022-11-16 12:03:47,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 356 transitions, 3243 flow [2022-11-16 12:03:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 12:03:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-16 12:03:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2800 transitions. [2022-11-16 12:03:47,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2022-11-16 12:03:47,784 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2800 transitions. [2022-11-16 12:03:47,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2800 transitions. [2022-11-16 12:03:47,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:47,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2800 transitions. [2022-11-16 12:03:47,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 51.851851851851855) internal successors, (2800), 54 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:47,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 120.0) internal successors, (6600), 55 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:47,802 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 120.0) internal successors, (6600), 55 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:47,803 INFO L175 Difference]: Start difference. First operand has 243 places, 273 transitions, 2228 flow. Second operand 54 states and 2800 transitions. [2022-11-16 12:03:47,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 356 transitions, 3243 flow [2022-11-16 12:03:47,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 356 transitions, 3034 flow, removed 42 selfloop flow, removed 33 redundant places. [2022-11-16 12:03:47,847 INFO L231 Difference]: Finished difference. Result has 264 places, 189 transitions, 1436 flow [2022-11-16 12:03:47,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1436, PETRI_PLACES=264, PETRI_TRANSITIONS=189} [2022-11-16 12:03:47,849 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 157 predicate places. [2022-11-16 12:03:47,849 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 189 transitions, 1436 flow [2022-11-16 12:03:47,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 50.38805970149254) internal successors, (3376), 67 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:47,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:47,850 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:47,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 12:03:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:03:48,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash 757045832, now seen corresponding path program 7 times [2022-11-16 12:03:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:48,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021673918] [2022-11-16 12:03:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:48,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:50,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021673918] [2022-11-16 12:03:50,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021673918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422023394] [2022-11-16 12:03:50,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:03:50,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:50,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:50,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:50,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:03:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:03:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:50,672 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 12:03:50,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 12:03:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:03:50,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:50,775 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:03:50,775 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 24 treesize of output 15 [2022-11-16 12:03:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:03:51,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422023394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:51,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:51,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 27 [2022-11-16 12:03:51,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114811740] [2022-11-16 12:03:51,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:51,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:03:51,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:51,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:03:51,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:03:51,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-16 12:03:51,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 189 transitions, 1436 flow. Second operand has 27 states, 27 states have (on average 61.74074074074074) internal successors, (1667), 27 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:51,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:51,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-16 12:03:51,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:54,316 INFO L130 PetriNetUnfolder]: 380/2580 cut-off events. [2022-11-16 12:03:54,316 INFO L131 PetriNetUnfolder]: For 11156/11169 co-relation queries the response was YES. [2022-11-16 12:03:54,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7315 conditions, 2580 events. 380/2580 cut-off events. For 11156/11169 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 25181 event pairs, 7 based on Foata normal form. 17/2375 useless extension candidates. Maximal degree in co-relation 7269. Up to 391 conditions per place. [2022-11-16 12:03:54,336 INFO L137 encePairwiseOnDemand]: 95/120 looper letters, 166 selfloop transitions, 110 changer transitions 47/371 dead transitions. [2022-11-16 12:03:54,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 371 transitions, 3793 flow [2022-11-16 12:03:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:03:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-16 12:03:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2994 transitions. [2022-11-16 12:03:54,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5197916666666667 [2022-11-16 12:03:54,341 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2994 transitions. [2022-11-16 12:03:54,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2994 transitions. [2022-11-16 12:03:54,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:54,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2994 transitions. [2022-11-16 12:03:54,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 62.375) internal successors, (2994), 48 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:54,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:54,357 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:54,357 INFO L175 Difference]: Start difference. First operand has 264 places, 189 transitions, 1436 flow. Second operand 48 states and 2994 transitions. [2022-11-16 12:03:54,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 371 transitions, 3793 flow [2022-11-16 12:03:54,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 371 transitions, 3083 flow, removed 254 selfloop flow, removed 49 redundant places. [2022-11-16 12:03:54,406 INFO L231 Difference]: Finished difference. Result has 251 places, 254 transitions, 2351 flow [2022-11-16 12:03:54,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2351, PETRI_PLACES=251, PETRI_TRANSITIONS=254} [2022-11-16 12:03:54,407 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 144 predicate places. [2022-11-16 12:03:54,407 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 254 transitions, 2351 flow [2022-11-16 12:03:54,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 61.74074074074074) internal successors, (1667), 27 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:54,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:54,408 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:54,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:03:54,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:54,613 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:54,614 INFO L85 PathProgramCache]: Analyzing trace with hash 726269092, now seen corresponding path program 8 times [2022-11-16 12:03:54,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:54,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274548310] [2022-11-16 12:03:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:54,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:56,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:56,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274548310] [2022-11-16 12:03:56,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274548310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:56,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14212428] [2022-11-16 12:03:56,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:03:56,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:56,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:56,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:56,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:03:56,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:03:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 12:03:56,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:57,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 12:03:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:57,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:57,615 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:03:57,615 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 24 treesize of output 15 [2022-11-16 12:03:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:58,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14212428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:58,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:58,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 52 [2022-11-16 12:03:58,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293131311] [2022-11-16 12:03:58,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:58,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:03:58,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:03:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:03:58,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-16 12:03:58,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 254 transitions, 2351 flow. Second operand has 52 states, 52 states have (on average 61.07692307692308) internal successors, (3176), 52 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:58,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:58,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-16 12:03:58,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:04,031 INFO L130 PetriNetUnfolder]: 812/5115 cut-off events. [2022-11-16 12:04:04,031 INFO L131 PetriNetUnfolder]: For 20630/20661 co-relation queries the response was YES. [2022-11-16 12:04:04,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14657 conditions, 5115 events. 812/5115 cut-off events. For 20630/20661 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 59486 event pairs, 8 based on Foata normal form. 71/4752 useless extension candidates. Maximal degree in co-relation 14600. Up to 664 conditions per place. [2022-11-16 12:04:04,098 INFO L137 encePairwiseOnDemand]: 96/120 looper letters, 237 selfloop transitions, 246 changer transitions 75/606 dead transitions. [2022-11-16 12:04:04,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 606 transitions, 6832 flow [2022-11-16 12:04:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 12:04:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-16 12:04:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4522 transitions. [2022-11-16 12:04:04,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5233796296296296 [2022-11-16 12:04:04,107 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4522 transitions. [2022-11-16 12:04:04,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4522 transitions. [2022-11-16 12:04:04,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:04,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4522 transitions. [2022-11-16 12:04:04,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 62.80555555555556) internal successors, (4522), 72 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:04,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 120.0) internal successors, (8760), 73 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:04,131 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 120.0) internal successors, (8760), 73 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:04,132 INFO L175 Difference]: Start difference. First operand has 251 places, 254 transitions, 2351 flow. Second operand 72 states and 4522 transitions. [2022-11-16 12:04:04,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 606 transitions, 6832 flow [2022-11-16 12:04:04,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 606 transitions, 6544 flow, removed 133 selfloop flow, removed 22 redundant places. [2022-11-16 12:04:04,399 INFO L231 Difference]: Finished difference. Result has 324 places, 369 transitions, 4620 flow [2022-11-16 12:04:04,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=4620, PETRI_PLACES=324, PETRI_TRANSITIONS=369} [2022-11-16 12:04:04,403 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 217 predicate places. [2022-11-16 12:04:04,403 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 369 transitions, 4620 flow [2022-11-16 12:04:04,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 61.07692307692308) internal successors, (3176), 52 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:04,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:04,405 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:04,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:04:04,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:04,612 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:04,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:04,612 INFO L85 PathProgramCache]: Analyzing trace with hash -798944270, now seen corresponding path program 9 times [2022-11-16 12:04:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:04,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644466015] [2022-11-16 12:04:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:04,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:06,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:06,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644466015] [2022-11-16 12:04:06,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644466015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:06,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882663041] [2022-11-16 12:04:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:04:06,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:06,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:06,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:06,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:04:06,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:04:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:04:06,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:07,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:07,494 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 [2022-11-16 12:04:07,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 12:04:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:04:07,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:07,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:04:07,794 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 44 treesize of output 41 [2022-11-16 12:04:07,803 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 10 treesize of output 3 [2022-11-16 12:04:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:04:08,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882663041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:08,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:08,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 16] total 47 [2022-11-16 12:04:08,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886292886] [2022-11-16 12:04:08,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:08,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:04:08,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:08,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:04:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2035, Unknown=5, NotChecked=0, Total=2162 [2022-11-16 12:04:08,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-11-16 12:04:08,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 369 transitions, 4620 flow. Second operand has 47 states, 47 states have (on average 52.191489361702125) internal successors, (2453), 47 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:08,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:08,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-11-16 12:04:08,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:16,535 INFO L130 PetriNetUnfolder]: 1225/7292 cut-off events. [2022-11-16 12:04:16,535 INFO L131 PetriNetUnfolder]: For 52988/53018 co-relation queries the response was YES. [2022-11-16 12:04:16,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24486 conditions, 7292 events. 1225/7292 cut-off events. For 52988/53018 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 89110 event pairs, 24 based on Foata normal form. 36/6706 useless extension candidates. Maximal degree in co-relation 24404. Up to 1018 conditions per place. [2022-11-16 12:04:16,623 INFO L137 encePairwiseOnDemand]: 96/120 looper letters, 237 selfloop transitions, 337 changer transitions 47/663 dead transitions. [2022-11-16 12:04:16,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 663 transitions, 9712 flow [2022-11-16 12:04:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 12:04:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-16 12:04:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3313 transitions. [2022-11-16 12:04:16,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4452956989247312 [2022-11-16 12:04:16,630 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3313 transitions. [2022-11-16 12:04:16,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3313 transitions. [2022-11-16 12:04:16,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:16,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3313 transitions. [2022-11-16 12:04:16,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 53.435483870967744) internal successors, (3313), 62 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:16,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:16,650 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:16,650 INFO L175 Difference]: Start difference. First operand has 324 places, 369 transitions, 4620 flow. Second operand 62 states and 3313 transitions. [2022-11-16 12:04:16,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 663 transitions, 9712 flow [2022-11-16 12:04:16,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 663 transitions, 8944 flow, removed 345 selfloop flow, removed 46 redundant places. [2022-11-16 12:04:16,963 INFO L231 Difference]: Finished difference. Result has 348 places, 497 transitions, 7505 flow [2022-11-16 12:04:16,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=7505, PETRI_PLACES=348, PETRI_TRANSITIONS=497} [2022-11-16 12:04:16,964 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 241 predicate places. [2022-11-16 12:04:16,964 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 497 transitions, 7505 flow [2022-11-16 12:04:16,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 52.191489361702125) internal successors, (2453), 47 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:16,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:16,965 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:16,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:17,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:17,166 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1216594676, now seen corresponding path program 10 times [2022-11-16 12:04:17,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:17,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902870594] [2022-11-16 12:04:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:17,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:04:17,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:17,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902870594] [2022-11-16 12:04:17,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902870594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:17,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150587455] [2022-11-16 12:04:17,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:04:17,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:17,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:17,354 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:17,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:04:17,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:04:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:17,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:04:17,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:04:17,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:04:18,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150587455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:18,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:18,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 11 [2022-11-16 12:04:18,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969120725] [2022-11-16 12:04:18,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:18,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:04:18,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:18,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:04:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:04:18,139 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 120 [2022-11-16 12:04:18,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 497 transitions, 7505 flow. Second operand has 11 states, 11 states have (on average 102.54545454545455) internal successors, (1128), 11 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:18,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:18,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 120 [2022-11-16 12:04:18,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:19,987 INFO L130 PetriNetUnfolder]: 568/5200 cut-off events. [2022-11-16 12:04:19,987 INFO L131 PetriNetUnfolder]: For 51467/51797 co-relation queries the response was YES. [2022-11-16 12:04:20,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17481 conditions, 5200 events. 568/5200 cut-off events. For 51467/51797 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 63955 event pairs, 50 based on Foata normal form. 70/4849 useless extension candidates. Maximal degree in co-relation 17392. Up to 953 conditions per place. [2022-11-16 12:04:20,043 INFO L137 encePairwiseOnDemand]: 113/120 looper letters, 262 selfloop transitions, 145 changer transitions 35/554 dead transitions. [2022-11-16 12:04:20,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 554 transitions, 9374 flow [2022-11-16 12:04:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:04:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:04:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 728 transitions. [2022-11-16 12:04:20,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2022-11-16 12:04:20,045 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 728 transitions. [2022-11-16 12:04:20,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 728 transitions. [2022-11-16 12:04:20,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:20,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 728 transitions. [2022-11-16 12:04:20,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:20,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:20,049 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:20,049 INFO L175 Difference]: Start difference. First operand has 348 places, 497 transitions, 7505 flow. Second operand 7 states and 728 transitions. [2022-11-16 12:04:20,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 554 transitions, 9374 flow [2022-11-16 12:04:20,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 554 transitions, 8714 flow, removed 254 selfloop flow, removed 46 redundant places. [2022-11-16 12:04:20,354 INFO L231 Difference]: Finished difference. Result has 297 places, 510 transitions, 7805 flow [2022-11-16 12:04:20,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=6702, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7805, PETRI_PLACES=297, PETRI_TRANSITIONS=510} [2022-11-16 12:04:20,355 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 190 predicate places. [2022-11-16 12:04:20,355 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 510 transitions, 7805 flow [2022-11-16 12:04:20,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.54545454545455) internal successors, (1128), 11 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:20,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:20,356 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:20,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:20,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1098147250, now seen corresponding path program 11 times [2022-11-16 12:04:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:20,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269772392] [2022-11-16 12:04:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:21,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269772392] [2022-11-16 12:04:21,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269772392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494002704] [2022-11-16 12:04:21,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:04:21,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:21,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:21,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:21,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:04:22,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:04:22,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:22,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:04:22,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:22,533 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 12:04:22,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 12:04:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:04:22,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:22,775 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:04:22,775 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 24 treesize of output 15 [2022-11-16 12:04:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:04:23,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494002704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:23,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:23,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 11] total 37 [2022-11-16 12:04:23,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442617527] [2022-11-16 12:04:23,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:23,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:04:23,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:04:23,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:04:23,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-16 12:04:23,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 510 transitions, 7805 flow. Second operand has 37 states, 37 states have (on average 61.83783783783784) internal successors, (2288), 37 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:23,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:23,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-16 12:04:23,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:31,144 INFO L130 PetriNetUnfolder]: 2847/15625 cut-off events. [2022-11-16 12:04:31,144 INFO L131 PetriNetUnfolder]: For 178615/179146 co-relation queries the response was YES. [2022-11-16 12:04:31,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60104 conditions, 15625 events. 2847/15625 cut-off events. For 178615/179146 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 218737 event pairs, 117 based on Foata normal form. 246/14558 useless extension candidates. Maximal degree in co-relation 60031. Up to 2737 conditions per place. [2022-11-16 12:04:31,437 INFO L137 encePairwiseOnDemand]: 92/120 looper letters, 483 selfloop transitions, 637 changer transitions 90/1258 dead transitions. [2022-11-16 12:04:31,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1258 transitions, 22901 flow [2022-11-16 12:04:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 12:04:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-16 12:04:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4041 transitions. [2022-11-16 12:04:31,451 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.526171875 [2022-11-16 12:04:31,451 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4041 transitions. [2022-11-16 12:04:31,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4041 transitions. [2022-11-16 12:04:31,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:31,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4041 transitions. [2022-11-16 12:04:31,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 63.140625) internal successors, (4041), 64 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:31,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 120.0) internal successors, (7800), 65 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:31,618 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 120.0) internal successors, (7800), 65 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:31,619 INFO L175 Difference]: Start difference. First operand has 297 places, 510 transitions, 7805 flow. Second operand 64 states and 4041 transitions. [2022-11-16 12:04:31,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1258 transitions, 22901 flow [2022-11-16 12:04:32,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1258 transitions, 22635 flow, removed 121 selfloop flow, removed 6 redundant places. [2022-11-16 12:04:32,466 INFO L231 Difference]: Finished difference. Result has 368 places, 1068 transitions, 21344 flow [2022-11-16 12:04:32,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=21344, PETRI_PLACES=368, PETRI_TRANSITIONS=1068} [2022-11-16 12:04:32,467 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 261 predicate places. [2022-11-16 12:04:32,467 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 1068 transitions, 21344 flow [2022-11-16 12:04:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 61.83783783783784) internal successors, (2288), 37 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:32,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:32,468 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:32,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:32,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:04:32,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1801386144, now seen corresponding path program 12 times [2022-11-16 12:04:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:32,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036965027] [2022-11-16 12:04:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:34,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:34,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036965027] [2022-11-16 12:04:34,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036965027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:34,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760881485] [2022-11-16 12:04:34,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:04:34,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:34,244 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:34,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:04:35,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 12:04:35,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:35,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:04:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:36,202 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 12:04:36,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 12:04:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:36,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:36,397 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:04:36,398 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 24 treesize of output 15 [2022-11-16 12:04:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:37,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760881485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:37,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:37,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 56 [2022-11-16 12:04:37,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904644418] [2022-11-16 12:04:37,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:37,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 12:04:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 12:04:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2719, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 12:04:37,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-16 12:04:37,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 1068 transitions, 21344 flow. Second operand has 56 states, 56 states have (on average 60.964285714285715) internal successors, (3414), 56 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:37,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:37,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-16 12:04:37,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:46,461 INFO L130 PetriNetUnfolder]: 1368/8793 cut-off events. [2022-11-16 12:04:46,461 INFO L131 PetriNetUnfolder]: For 144307/144914 co-relation queries the response was YES. [2022-11-16 12:04:46,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39059 conditions, 8793 events. 1368/8793 cut-off events. For 144307/144914 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 113263 event pairs, 57 based on Foata normal form. 282/8337 useless extension candidates. Maximal degree in co-relation 38964. Up to 1175 conditions per place. [2022-11-16 12:04:46,608 INFO L137 encePairwiseOnDemand]: 90/120 looper letters, 406 selfloop transitions, 282 changer transitions 93/829 dead transitions. [2022-11-16 12:04:46,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 829 transitions, 16357 flow [2022-11-16 12:04:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 12:04:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-16 12:04:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3869 transitions. [2022-11-16 12:04:46,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5200268817204301 [2022-11-16 12:04:46,614 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3869 transitions. [2022-11-16 12:04:46,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3869 transitions. [2022-11-16 12:04:46,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:46,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3869 transitions. [2022-11-16 12:04:46,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 62.403225806451616) internal successors, (3869), 62 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:46,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:46,633 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:46,633 INFO L175 Difference]: Start difference. First operand has 368 places, 1068 transitions, 21344 flow. Second operand 62 states and 3869 transitions. [2022-11-16 12:04:46,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 829 transitions, 16357 flow [2022-11-16 12:04:47,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 829 transitions, 15191 flow, removed 514 selfloop flow, removed 39 redundant places. [2022-11-16 12:04:47,277 INFO L231 Difference]: Finished difference. Result has 396 places, 612 transitions, 11538 flow [2022-11-16 12:04:47,278 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9261, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=11538, PETRI_PLACES=396, PETRI_TRANSITIONS=612} [2022-11-16 12:04:47,278 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 289 predicate places. [2022-11-16 12:04:47,278 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 612 transitions, 11538 flow [2022-11-16 12:04:47,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 60.964285714285715) internal successors, (3414), 56 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:47,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:47,280 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:47,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 12:04:47,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:04:47,486 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:47,487 INFO L85 PathProgramCache]: Analyzing trace with hash 819891186, now seen corresponding path program 13 times [2022-11-16 12:04:47,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:47,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306305162] [2022-11-16 12:04:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:47,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306305162] [2022-11-16 12:04:48,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306305162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407011992] [2022-11-16 12:04:48,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:04:48,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:48,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:48,740 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:48,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:04:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:04:48,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:50,194 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 12:04:50,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 12:04:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:50,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:50,367 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-16 12:04:50,368 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 25 treesize of output 17 [2022-11-16 12:04:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:52,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407011992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:52,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:52,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-11-16 12:04:52,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259435774] [2022-11-16 12:04:52,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:52,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 12:04:52,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:52,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 12:04:52,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2838, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 12:04:52,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-16 12:04:52,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 612 transitions, 11538 flow. Second operand has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:52,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:52,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-16 12:04:52,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:10,300 INFO L130 PetriNetUnfolder]: 2062/12176 cut-off events. [2022-11-16 12:05:10,300 INFO L131 PetriNetUnfolder]: For 243643/244659 co-relation queries the response was YES. [2022-11-16 12:05:10,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60512 conditions, 12176 events. 2062/12176 cut-off events. For 243643/244659 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 156729 event pairs, 37 based on Foata normal form. 138/11341 useless extension candidates. Maximal degree in co-relation 60411. Up to 1902 conditions per place. [2022-11-16 12:05:10,520 INFO L137 encePairwiseOnDemand]: 89/120 looper letters, 605 selfloop transitions, 627 changer transitions 153/1433 dead transitions. [2022-11-16 12:05:10,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1433 transitions, 31180 flow [2022-11-16 12:05:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-16 12:05:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2022-11-16 12:05:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 8582 transitions. [2022-11-16 12:05:10,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5220194647201947 [2022-11-16 12:05:10,538 INFO L72 ComplementDD]: Start complementDD. Operand 137 states and 8582 transitions. [2022-11-16 12:05:10,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 8582 transitions. [2022-11-16 12:05:10,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:10,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 137 states and 8582 transitions. [2022-11-16 12:05:10,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 138 states, 137 states have (on average 62.64233576642336) internal successors, (8582), 137 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:10,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 138 states, 138 states have (on average 120.0) internal successors, (16560), 138 states have internal predecessors, (16560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:10,715 INFO L81 ComplementDD]: Finished complementDD. Result has 138 states, 138 states have (on average 120.0) internal successors, (16560), 138 states have internal predecessors, (16560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:10,715 INFO L175 Difference]: Start difference. First operand has 396 places, 612 transitions, 11538 flow. Second operand 137 states and 8582 transitions. [2022-11-16 12:05:10,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1433 transitions, 31180 flow [2022-11-16 12:05:11,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1433 transitions, 27193 flow, removed 1943 selfloop flow, removed 44 redundant places. [2022-11-16 12:05:11,434 INFO L231 Difference]: Finished difference. Result has 548 places, 981 transitions, 20920 flow [2022-11-16 12:05:11,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=10621, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=20920, PETRI_PLACES=548, PETRI_TRANSITIONS=981} [2022-11-16 12:05:11,435 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 441 predicate places. [2022-11-16 12:05:11,435 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 981 transitions, 20920 flow [2022-11-16 12:05:11,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:11,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:11,436 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:11,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:11,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:05:11,637 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash 101853596, now seen corresponding path program 14 times [2022-11-16 12:05:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:11,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031052049] [2022-11-16 12:05:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:12,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031052049] [2022-11-16 12:05:12,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031052049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564036197] [2022-11-16 12:05:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:12,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:12,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:12,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:05:13,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:05:13,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:13,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 12:05:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:14,373 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 12:05:14,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 12:05:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:14,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:14,721 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:05:14,723 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 24 treesize of output 15 [2022-11-16 12:05:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:16,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564036197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:16,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:16,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-11-16 12:05:16,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175181241] [2022-11-16 12:05:16,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:16,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 12:05:16,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 12:05:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2784, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 12:05:16,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-16 12:05:16,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 981 transitions, 20920 flow. Second operand has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:16,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:16,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-16 12:05:16,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:44,638 INFO L130 PetriNetUnfolder]: 4550/25588 cut-off events. [2022-11-16 12:05:44,638 INFO L131 PetriNetUnfolder]: For 908456/910404 co-relation queries the response was YES. [2022-11-16 12:05:45,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157294 conditions, 25588 events. 4550/25588 cut-off events. For 908456/910404 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 370528 event pairs, 108 based on Foata normal form. 520/24127 useless extension candidates. Maximal degree in co-relation 157132. Up to 4090 conditions per place. [2022-11-16 12:05:45,481 INFO L137 encePairwiseOnDemand]: 88/120 looper letters, 1035 selfloop transitions, 2094 changer transitions 203/3380 dead transitions. [2022-11-16 12:05:45,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 3380 transitions, 87331 flow [2022-11-16 12:05:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-11-16 12:05:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2022-11-16 12:05:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 10110 transitions. [2022-11-16 12:05:45,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5168711656441718 [2022-11-16 12:05:45,500 INFO L72 ComplementDD]: Start complementDD. Operand 163 states and 10110 transitions. [2022-11-16 12:05:45,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 10110 transitions. [2022-11-16 12:05:45,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:45,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 163 states and 10110 transitions. [2022-11-16 12:05:45,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 164 states, 163 states have (on average 62.02453987730061) internal successors, (10110), 163 states have internal predecessors, (10110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:45,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 164 states, 164 states have (on average 120.0) internal successors, (19680), 164 states have internal predecessors, (19680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:45,553 INFO L81 ComplementDD]: Finished complementDD. Result has 164 states, 164 states have (on average 120.0) internal successors, (19680), 164 states have internal predecessors, (19680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:45,554 INFO L175 Difference]: Start difference. First operand has 548 places, 981 transitions, 20920 flow. Second operand 163 states and 10110 transitions. [2022-11-16 12:05:45,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 3380 transitions, 87331 flow [2022-11-16 12:05:49,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 3380 transitions, 70193 flow, removed 8499 selfloop flow, removed 75 redundant places. [2022-11-16 12:05:50,071 INFO L231 Difference]: Finished difference. Result has 681 places, 2823 transitions, 59350 flow [2022-11-16 12:05:50,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=16891, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=163, PETRI_FLOW=59350, PETRI_PLACES=681, PETRI_TRANSITIONS=2823} [2022-11-16 12:05:50,073 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 574 predicate places. [2022-11-16 12:05:50,073 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 2823 transitions, 59350 flow [2022-11-16 12:05:50,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:50,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:50,075 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:50,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:50,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:05:50,290 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:50,290 INFO L85 PathProgramCache]: Analyzing trace with hash 329264942, now seen corresponding path program 15 times [2022-11-16 12:05:50,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:50,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238465569] [2022-11-16 12:05:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:50,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:51,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238465569] [2022-11-16 12:05:51,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238465569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754516833] [2022-11-16 12:05:51,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:05:51,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:51,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:51,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:51,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d32cd6-d318-44d6-a78f-93709dd3ffed/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:05:52,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:05:52,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:52,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:05:52,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:52,626 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 12:05:52,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 12:05:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:05:52,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:52,852 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:05:52,853 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 24 treesize of output 15 [2022-11-16 12:05:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:05:53,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754516833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:53,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:53,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 11] total 37 [2022-11-16 12:05:53,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154069989] [2022-11-16 12:05:53,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:53,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:05:53,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:53,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:05:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:05:53,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-16 12:05:53,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 2823 transitions, 59350 flow. Second operand has 37 states, 37 states have (on average 61.891891891891895) internal successors, (2290), 37 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:53,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:53,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-16 12:05:53,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand