./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro --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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- 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-8393723 [2022-11-18 19:54:32,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:54:32,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:54:32,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:54:32,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:54:32,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:54:32,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:54:32,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:54:32,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:54:32,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:54:32,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:54:32,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:54:32,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:54:32,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:54:32,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:54:32,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:54:32,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:54:32,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:54:32,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:54:32,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:54:32,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:54:32,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:54:32,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:54:32,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:54:32,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:54:32,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:54:32,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:54:32,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:54:32,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:54:32,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:54:32,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:54:32,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:54:32,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:54:32,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:54:32,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:54:32,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:54:32,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:54:32,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:54:32,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:54:32,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:54:32,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:54:32,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:54:32,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:54:32,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:54:32,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:54:32,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:54:32,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:54:32,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:54:32,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:54:32,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:54:32,942 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:54:32,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:54:32,943 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:54:32,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:54:32,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:54:32,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:54:32,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:54:32,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:54:32,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:54:32,945 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:54:32,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:54:32,945 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:54:32,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:54:32,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:54:32,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:54:32,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:54:32,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:54:32,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:54:32,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:54:32,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:54:32,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:54:32,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:54:32,947 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:54:32,947 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:54:32,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:54:32,948 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_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-11-18 19:54:33,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:54:33,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:54:33,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:54:33,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:54:33,325 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:54:33,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-11-18 19:54:33,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/data/6fc0f2340/d2fdb2defd814dc1b07c8a4f6981ce9e/FLAG7bc9a48a4 [2022-11-18 19:54:33,799 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:54:33,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-11-18 19:54:33,812 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/data/6fc0f2340/d2fdb2defd814dc1b07c8a4f6981ce9e/FLAG7bc9a48a4 [2022-11-18 19:54:34,193 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/data/6fc0f2340/d2fdb2defd814dc1b07c8a4f6981ce9e [2022-11-18 19:54:34,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:54:34,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:54:34,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:54:34,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:54:34,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:54:34,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9bfddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34, skipping insertion in model container [2022-11-18 19:54:34,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:54:34,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:54:34,531 WARN L234 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_99378635-907b-4d55-aa0f-7884a876df2f/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-11-18 19:54:34,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:54:34,564 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:54:34,602 WARN L234 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_99378635-907b-4d55-aa0f-7884a876df2f/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-11-18 19:54:34,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:54:34,631 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:54:34,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34 WrapperNode [2022-11-18 19:54:34,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:54:34,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:54:34,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:54:34,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:54:34,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,702 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-11-18 19:54:34,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:54:34,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:54:34,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:54:34,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:54:34,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,727 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:54:34,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:54:34,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:54:34,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:54:34,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (1/1) ... [2022-11-18 19:54:34,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:54:34,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:34,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:54:34,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:54:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:54:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:54:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:54:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:54:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:54:34,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:54:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:54:34,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:54:34,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 19:54:34,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 19:54:34,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:54:34,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:54:34,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:54:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:54:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:54:34,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:54:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:54:34,823 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:54:34,942 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:54:34,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:54:35,357 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:54:35,537 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:54:35,549 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 19:54:35,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:54:35 BoogieIcfgContainer [2022-11-18 19:54:35,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:54:35,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:54:35,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:54:35,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:54:35,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:54:34" (1/3) ... [2022-11-18 19:54:35,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5669f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:54:35, skipping insertion in model container [2022-11-18 19:54:35,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:54:34" (2/3) ... [2022-11-18 19:54:35,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5669f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:54:35, skipping insertion in model container [2022-11-18 19:54:35,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:54:35" (3/3) ... [2022-11-18 19:54:35,563 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-11-18 19:54:35,577 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:54:35,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:54:35,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:54:35,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:54:35,657 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 19:54:35,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2022-11-18 19:54:35,798 INFO L130 PetriNetUnfolder]: 9/151 cut-off events. [2022-11-18 19:54:35,798 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:54:35,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-11-18 19:54:35,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2022-11-18 19:54:35,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2022-11-18 19:54:35,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:54:35,842 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;@50c85c2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:54:35,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 19:54:35,912 INFO L130 PetriNetUnfolder]: 9/139 cut-off events. [2022-11-18 19:54:35,912 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:54:35,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:35,913 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:35,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:54:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash -17405123, now seen corresponding path program 1 times [2022-11-18 19:54:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:35,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004950863] [2022-11-18 19:54:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:35,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:36,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:36,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004950863] [2022-11-18 19:54:36,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004950863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:36,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:54:36,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:54:36,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7357056] [2022-11-18 19:54:36,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:36,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:54:36,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:54:36,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:54:36,364 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 154 [2022-11-18 19:54:36,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 298 flow. Second operand has 2 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:36,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 154 [2022-11-18 19:54:36,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:36,481 INFO L130 PetriNetUnfolder]: 18/215 cut-off events. [2022-11-18 19:54:36,481 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-18 19:54:36,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 215 events. 18/215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 460 event pairs, 15 based on Foata normal form. 19/223 useless extension candidates. Maximal degree in co-relation 150. Up to 37 conditions per place. [2022-11-18 19:54:36,485 INFO L137 encePairwiseOnDemand]: 148/154 looper letters, 9 selfloop transitions, 0 changer transitions 3/134 dead transitions. [2022-11-18 19:54:36,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 304 flow [2022-11-18 19:54:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:54:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:54:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-11-18 19:54:36,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9448051948051948 [2022-11-18 19:54:36,501 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-11-18 19:54:36,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-11-18 19:54:36,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:36,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-11-18 19:54:36,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,515 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,517 INFO L175 Difference]: Start difference. First operand has 141 places, 140 transitions, 298 flow. Second operand 2 states and 291 transitions. [2022-11-18 19:54:36,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 304 flow [2022-11-18 19:54:36,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 19:54:36,543 INFO L231 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2022-11-18 19:54:36,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2022-11-18 19:54:36,549 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2022-11-18 19:54:36,549 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2022-11-18 19:54:36,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:36,551 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:36,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:54:36,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:54:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -17693890, now seen corresponding path program 1 times [2022-11-18 19:54:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:36,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122526732] [2022-11-18 19:54:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:37,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122526732] [2022-11-18 19:54:37,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122526732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:37,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:54:37,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:54:37,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894355782] [2022-11-18 19:54:37,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:37,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:54:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:37,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:54:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:54:37,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2022-11-18 19:54:37,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:37,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:37,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2022-11-18 19:54:37,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:37,285 INFO L130 PetriNetUnfolder]: 20/259 cut-off events. [2022-11-18 19:54:37,285 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 19:54:37,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 259 events. 20/259 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 609 event pairs, 15 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 327. Up to 46 conditions per place. [2022-11-18 19:54:37,291 INFO L137 encePairwiseOnDemand]: 144/154 looper letters, 21 selfloop transitions, 6 changer transitions 4/139 dead transitions. [2022-11-18 19:54:37,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 139 transitions, 349 flow [2022-11-18 19:54:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:54:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:54:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-11-18 19:54:37,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2022-11-18 19:54:37,300 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-11-18 19:54:37,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-11-18 19:54:37,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:37,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-11-18 19:54:37,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:37,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:37,313 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:37,313 INFO L175 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 7 states and 902 transitions. [2022-11-18 19:54:37,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 139 transitions, 349 flow [2022-11-18 19:54:37,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:54:37,321 INFO L231 Difference]: Finished difference. Result has 141 places, 132 transitions, 294 flow [2022-11-18 19:54:37,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2022-11-18 19:54:37,323 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-11-18 19:54:37,323 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 294 flow [2022-11-18 19:54:37,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:37,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:37,325 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:54:37,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:54:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1623665360, now seen corresponding path program 1 times [2022-11-18 19:54:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:37,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317609959] [2022-11-18 19:54:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:37,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:37,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317609959] [2022-11-18 19:54:37,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317609959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450295844] [2022-11-18 19:54:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:37,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:37,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:37,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:54:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:54:37,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:38,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:38,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450295844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:54:38,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:54:38,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-11-18 19:54:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084269158] [2022-11-18 19:54:38,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:54:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:54:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:54:38,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 154 [2022-11-18 19:54:38,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:38,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:38,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 154 [2022-11-18 19:54:38,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:38,751 INFO L130 PetriNetUnfolder]: 24/300 cut-off events. [2022-11-18 19:54:38,751 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-18 19:54:38,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 300 events. 24/300 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 853 event pairs, 15 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 426. Up to 44 conditions per place. [2022-11-18 19:54:38,753 INFO L137 encePairwiseOnDemand]: 141/154 looper letters, 24 selfloop transitions, 11 changer transitions 9/149 dead transitions. [2022-11-18 19:54:38,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 149 transitions, 430 flow [2022-11-18 19:54:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:54:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 19:54:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1500 transitions. [2022-11-18 19:54:38,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8116883116883117 [2022-11-18 19:54:38,758 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1500 transitions. [2022-11-18 19:54:38,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1500 transitions. [2022-11-18 19:54:38,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:38,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1500 transitions. [2022-11-18 19:54:38,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:38,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:38,768 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:38,768 INFO L175 Difference]: Start difference. First operand has 141 places, 132 transitions, 294 flow. Second operand 12 states and 1500 transitions. [2022-11-18 19:54:38,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 149 transitions, 430 flow [2022-11-18 19:54:38,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 149 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 19:54:38,772 INFO L231 Difference]: Finished difference. Result has 153 places, 136 transitions, 347 flow [2022-11-18 19:54:38,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=347, PETRI_PLACES=153, PETRI_TRANSITIONS=136} [2022-11-18 19:54:38,773 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 12 predicate places. [2022-11-18 19:54:38,773 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 136 transitions, 347 flow [2022-11-18 19:54:38,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:38,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:38,775 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:38,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:38,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:38,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:54:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash 640989232, now seen corresponding path program 2 times [2022-11-18 19:54:38,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:38,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918402399] [2022-11-18 19:54:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:38,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:41,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918402399] [2022-11-18 19:54:41,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918402399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529797632] [2022-11-18 19:54:41,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:54:41,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:41,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:41,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:41,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:54:42,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:54:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:54:42,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 19:54:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:42,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:42,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:54:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:54:42,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:54:42,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529797632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:42,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:54:42,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [26] total 34 [2022-11-18 19:54:42,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022550286] [2022-11-18 19:54:42,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:42,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:54:42,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:42,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:54:42,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 19:54:42,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-18 19:54:42,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 136 transitions, 347 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:42,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:42,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-18 19:54:42,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:43,602 INFO L130 PetriNetUnfolder]: 424/1095 cut-off events. [2022-11-18 19:54:43,602 INFO L131 PetriNetUnfolder]: For 887/887 co-relation queries the response was YES. [2022-11-18 19:54:43,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 1095 events. 424/1095 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6060 event pairs, 105 based on Foata normal form. 35/1079 useless extension candidates. Maximal degree in co-relation 2325. Up to 500 conditions per place. [2022-11-18 19:54:43,611 INFO L137 encePairwiseOnDemand]: 137/154 looper letters, 70 selfloop transitions, 15 changer transitions 36/211 dead transitions. [2022-11-18 19:54:43,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 211 transitions, 802 flow [2022-11-18 19:54:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:54:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 19:54:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1400 transitions. [2022-11-18 19:54:43,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6993006993006993 [2022-11-18 19:54:43,616 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1400 transitions. [2022-11-18 19:54:43,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1400 transitions. [2022-11-18 19:54:43,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:43,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1400 transitions. [2022-11-18 19:54:43,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.6923076923077) internal successors, (1400), 13 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:43,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:43,625 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:43,625 INFO L175 Difference]: Start difference. First operand has 153 places, 136 transitions, 347 flow. Second operand 13 states and 1400 transitions. [2022-11-18 19:54:43,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 211 transitions, 802 flow [2022-11-18 19:54:43,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 749 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-11-18 19:54:43,633 INFO L231 Difference]: Finished difference. Result has 168 places, 150 transitions, 455 flow [2022-11-18 19:54:43,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=455, PETRI_PLACES=168, PETRI_TRANSITIONS=150} [2022-11-18 19:54:43,634 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 27 predicate places. [2022-11-18 19:54:43,634 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 150 transitions, 455 flow [2022-11-18 19:54:43,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:43,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:43,635 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:43,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:43,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:43,842 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:54:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:43,842 INFO L85 PathProgramCache]: Analyzing trace with hash 652597846, now seen corresponding path program 3 times [2022-11-18 19:54:43,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:43,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668161032] [2022-11-18 19:54:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:43,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668161032] [2022-11-18 19:54:48,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668161032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299998483] [2022-11-18 19:54:48,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:54:48,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:48,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:48,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:54:49,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:54:49,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:54:49,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 19:54:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:49,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:49,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:54:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:54:49,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:54:49,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299998483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:49,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:54:49,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [34] total 42 [2022-11-18 19:54:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531637895] [2022-11-18 19:54:49,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:49,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:54:49,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:54:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1600, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 19:54:49,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-18 19:54:49,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 150 transitions, 455 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:49,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:49,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-18 19:54:49,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:50,906 INFO L130 PetriNetUnfolder]: 561/1310 cut-off events. [2022-11-18 19:54:50,906 INFO L131 PetriNetUnfolder]: For 1534/1598 co-relation queries the response was YES. [2022-11-18 19:54:50,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3452 conditions, 1310 events. 561/1310 cut-off events. For 1534/1598 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7152 event pairs, 158 based on Foata normal form. 18/1273 useless extension candidates. Maximal degree in co-relation 3431. Up to 661 conditions per place. [2022-11-18 19:54:50,919 INFO L137 encePairwiseOnDemand]: 138/154 looper letters, 76 selfloop transitions, 22 changer transitions 36/224 dead transitions. [2022-11-18 19:54:50,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 224 transitions, 1017 flow [2022-11-18 19:54:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:54:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 19:54:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1395 transitions. [2022-11-18 19:54:50,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6968031968031968 [2022-11-18 19:54:50,924 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1395 transitions. [2022-11-18 19:54:50,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1395 transitions. [2022-11-18 19:54:50,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:50,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1395 transitions. [2022-11-18 19:54:50,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.3076923076923) internal successors, (1395), 13 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:50,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:50,935 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:50,935 INFO L175 Difference]: Start difference. First operand has 168 places, 150 transitions, 455 flow. Second operand 13 states and 1395 transitions. [2022-11-18 19:54:50,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 224 transitions, 1017 flow [2022-11-18 19:54:50,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 224 transitions, 969 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-11-18 19:54:50,944 INFO L231 Difference]: Finished difference. Result has 179 places, 168 transitions, 639 flow [2022-11-18 19:54:50,945 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=639, PETRI_PLACES=179, PETRI_TRANSITIONS=168} [2022-11-18 19:54:50,946 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 38 predicate places. [2022-11-18 19:54:50,946 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 168 transitions, 639 flow [2022-11-18 19:54:50,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:50,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:50,947 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:50,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:51,154 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:54:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1174125112, now seen corresponding path program 4 times [2022-11-18 19:54:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:51,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139354154] [2022-11-18 19:54:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:51,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:55,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:55,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139354154] [2022-11-18 19:54:55,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139354154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:55,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9464239] [2022-11-18 19:54:55,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:54:55,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:55,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:55,640 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:55,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:54:55,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:54:55,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:54:55,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:54:55,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:57,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:57,426 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 21 treesize of output 23 [2022-11-18 19:54:57,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:57,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:54:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:58,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:59,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:59,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 126 [2022-11-18 19:54:59,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:59,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 60 [2022-11-18 19:55:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:02,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9464239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:02,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:55:02,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 82 [2022-11-18 19:55:02,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900644455] [2022-11-18 19:55:02,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-18 19:55:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-18 19:55:02,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=6314, Unknown=2, NotChecked=0, Total=6642 [2022-11-18 19:55:02,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-11-18 19:55:02,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 168 transitions, 639 flow. Second operand has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:02,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:02,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-11-18 19:55:02,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:55:26,509 INFO L130 PetriNetUnfolder]: 1628/4013 cut-off events. [2022-11-18 19:55:26,509 INFO L131 PetriNetUnfolder]: For 7746/7998 co-relation queries the response was YES. [2022-11-18 19:55:26,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11388 conditions, 4013 events. 1628/4013 cut-off events. For 7746/7998 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 31368 event pairs, 258 based on Foata normal form. 84/3901 useless extension candidates. Maximal degree in co-relation 11361. Up to 580 conditions per place. [2022-11-18 19:55:26,546 INFO L137 encePairwiseOnDemand]: 112/154 looper letters, 273 selfloop transitions, 110 changer transitions 83/523 dead transitions. [2022-11-18 19:55:26,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 523 transitions, 3167 flow [2022-11-18 19:55:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-18 19:55:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-18 19:55:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4774 transitions. [2022-11-18 19:55:26,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2022-11-18 19:55:26,558 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4774 transitions. [2022-11-18 19:55:26,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4774 transitions. [2022-11-18 19:55:26,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:55:26,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4774 transitions. [2022-11-18 19:55:26,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 70.20588235294117) internal successors, (4774), 68 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:26,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:26,594 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:26,594 INFO L175 Difference]: Start difference. First operand has 179 places, 168 transitions, 639 flow. Second operand 68 states and 4774 transitions. [2022-11-18 19:55:26,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 523 transitions, 3167 flow [2022-11-18 19:55:26,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 523 transitions, 3023 flow, removed 72 selfloop flow, removed 6 redundant places. [2022-11-18 19:55:26,620 INFO L231 Difference]: Finished difference. Result has 271 places, 241 transitions, 1548 flow [2022-11-18 19:55:26,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=1548, PETRI_PLACES=271, PETRI_TRANSITIONS=241} [2022-11-18 19:55:26,621 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 130 predicate places. [2022-11-18 19:55:26,621 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 241 transitions, 1548 flow [2022-11-18 19:55:26,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:26,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:55:26,624 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:26,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 19:55:26,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:26,830 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:55:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1696703220, now seen corresponding path program 5 times [2022-11-18 19:55:26,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266973829] [2022-11-18 19:55:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:26,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:55:26,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:26,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266973829] [2022-11-18 19:55:26,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266973829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:55:26,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:55:26,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:55:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689990039] [2022-11-18 19:55:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:55:26,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:55:26,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:55:26,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:55:26,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 154 [2022-11-18 19:55:26,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 241 transitions, 1548 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:26,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:26,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 154 [2022-11-18 19:55:26,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:55:27,407 INFO L130 PetriNetUnfolder]: 339/1439 cut-off events. [2022-11-18 19:55:27,408 INFO L131 PetriNetUnfolder]: For 8585/8744 co-relation queries the response was YES. [2022-11-18 19:55:27,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4546 conditions, 1439 events. 339/1439 cut-off events. For 8585/8744 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10732 event pairs, 36 based on Foata normal form. 79/1368 useless extension candidates. Maximal degree in co-relation 4487. Up to 231 conditions per place. [2022-11-18 19:55:27,425 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 19 selfloop transitions, 40 changer transitions 1/233 dead transitions. [2022-11-18 19:55:27,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 233 transitions, 1567 flow [2022-11-18 19:55:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:55:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:55:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2022-11-18 19:55:27,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2022-11-18 19:55:27,428 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2022-11-18 19:55:27,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2022-11-18 19:55:27,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:55:27,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2022-11-18 19:55:27,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:27,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:27,431 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:27,431 INFO L175 Difference]: Start difference. First operand has 271 places, 241 transitions, 1548 flow. Second operand 4 states and 550 transitions. [2022-11-18 19:55:27,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 233 transitions, 1567 flow [2022-11-18 19:55:27,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 233 transitions, 1361 flow, removed 65 selfloop flow, removed 37 redundant places. [2022-11-18 19:55:27,470 INFO L231 Difference]: Finished difference. Result has 220 places, 228 transitions, 1346 flow [2022-11-18 19:55:27,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1346, PETRI_PLACES=220, PETRI_TRANSITIONS=228} [2022-11-18 19:55:27,471 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 79 predicate places. [2022-11-18 19:55:27,471 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 228 transitions, 1346 flow [2022-11-18 19:55:27,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:27,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:55:27,472 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:27,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:55:27,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:55:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:27,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1625478070, now seen corresponding path program 6 times [2022-11-18 19:55:27,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:27,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943354157] [2022-11-18 19:55:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:27,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:32,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:32,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943354157] [2022-11-18 19:55:32,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943354157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208401329] [2022-11-18 19:55:32,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:55:32,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:32,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:32,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:32,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:55:32,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-18 19:55:32,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:55:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 19:55:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:33,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:33,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:55:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:55:33,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:55:33,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208401329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:55:33,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:55:33,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [35] total 43 [2022-11-18 19:55:33,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145957497] [2022-11-18 19:55:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:55:33,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:55:33,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:55:33,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 19:55:33,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-18 19:55:33,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 228 transitions, 1346 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:33,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:33,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-18 19:55:33,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:55:34,737 INFO L130 PetriNetUnfolder]: 770/2322 cut-off events. [2022-11-18 19:55:34,737 INFO L131 PetriNetUnfolder]: For 11423/11649 co-relation queries the response was YES. [2022-11-18 19:55:34,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8167 conditions, 2322 events. 770/2322 cut-off events. For 11423/11649 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 17508 event pairs, 161 based on Foata normal form. 79/2261 useless extension candidates. Maximal degree in co-relation 8124. Up to 952 conditions per place. [2022-11-18 19:55:34,759 INFO L137 encePairwiseOnDemand]: 139/154 looper letters, 120 selfloop transitions, 45 changer transitions 37/301 dead transitions. [2022-11-18 19:55:34,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 301 transitions, 2171 flow [2022-11-18 19:55:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:55:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 19:55:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1395 transitions. [2022-11-18 19:55:34,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6968031968031968 [2022-11-18 19:55:34,763 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1395 transitions. [2022-11-18 19:55:34,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1395 transitions. [2022-11-18 19:55:34,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:55:34,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1395 transitions. [2022-11-18 19:55:34,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.3076923076923) internal successors, (1395), 13 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:34,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:34,770 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:34,770 INFO L175 Difference]: Start difference. First operand has 220 places, 228 transitions, 1346 flow. Second operand 13 states and 1395 transitions. [2022-11-18 19:55:34,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 301 transitions, 2171 flow [2022-11-18 19:55:34,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 301 transitions, 2109 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-18 19:55:34,813 INFO L231 Difference]: Finished difference. Result has 237 places, 243 transitions, 1626 flow [2022-11-18 19:55:34,814 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1626, PETRI_PLACES=237, PETRI_TRANSITIONS=243} [2022-11-18 19:55:34,814 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 96 predicate places. [2022-11-18 19:55:34,814 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 243 transitions, 1626 flow [2022-11-18 19:55:34,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:34,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:55:34,816 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:34,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 19:55:35,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:55:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1401390300, now seen corresponding path program 7 times [2022-11-18 19:55:35,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:35,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971199631] [2022-11-18 19:55:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:35,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:39,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:39,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971199631] [2022-11-18 19:55:39,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971199631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:39,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664524891] [2022-11-18 19:55:39,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:55:39,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:39,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:39,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:39,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:55:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:39,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 19:55:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:39,601 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 [2022-11-18 19:55:39,957 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:55:39,957 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 11 treesize of output 11 [2022-11-18 19:55:41,427 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 33 treesize of output 33 [2022-11-18 19:55:42,113 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-18 19:55:42,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 23 [2022-11-18 19:55:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:42,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:43,420 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-18 19:55:43,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 105 [2022-11-18 19:55:44,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:44,273 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 20 treesize of output 7 [2022-11-18 19:55:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:48,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664524891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:48,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:55:48,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 83 [2022-11-18 19:55:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241749015] [2022-11-18 19:55:48,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:48,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-18 19:55:48,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-18 19:55:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=6417, Unknown=1, NotChecked=0, Total=6806 [2022-11-18 19:55:48,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-11-18 19:55:48,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 243 transitions, 1626 flow. Second operand has 83 states, 83 states have (on average 66.46987951807229) internal successors, (5517), 83 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:48,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:48,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-11-18 19:55:48,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:56:02,573 INFO L130 PetriNetUnfolder]: 890/2784 cut-off events. [2022-11-18 19:56:02,573 INFO L131 PetriNetUnfolder]: For 14088/14304 co-relation queries the response was YES. [2022-11-18 19:56:02,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10227 conditions, 2784 events. 890/2784 cut-off events. For 14088/14304 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22779 event pairs, 130 based on Foata normal form. 57/2670 useless extension candidates. Maximal degree in co-relation 10176. Up to 348 conditions per place. [2022-11-18 19:56:02,605 INFO L137 encePairwiseOnDemand]: 107/154 looper letters, 218 selfloop transitions, 139 changer transitions 34/448 dead transitions. [2022-11-18 19:56:02,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 448 transitions, 3853 flow [2022-11-18 19:56:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-18 19:56:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-18 19:56:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3881 transitions. [2022-11-18 19:56:02,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4500231910946197 [2022-11-18 19:56:02,613 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3881 transitions. [2022-11-18 19:56:02,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3881 transitions. [2022-11-18 19:56:02,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:56:02,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3881 transitions. [2022-11-18 19:56:02,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 69.30357142857143) internal successors, (3881), 56 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:02,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 154.0) internal successors, (8778), 57 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:02,635 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 154.0) internal successors, (8778), 57 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:02,635 INFO L175 Difference]: Start difference. First operand has 237 places, 243 transitions, 1626 flow. Second operand 56 states and 3881 transitions. [2022-11-18 19:56:02,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 448 transitions, 3853 flow [2022-11-18 19:56:02,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 448 transitions, 3728 flow, removed 38 selfloop flow, removed 9 redundant places. [2022-11-18 19:56:02,691 INFO L231 Difference]: Finished difference. Result has 296 places, 313 transitions, 2734 flow [2022-11-18 19:56:02,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2734, PETRI_PLACES=296, PETRI_TRANSITIONS=313} [2022-11-18 19:56:02,692 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 155 predicate places. [2022-11-18 19:56:02,692 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 313 transitions, 2734 flow [2022-11-18 19:56:02,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 66.46987951807229) internal successors, (5517), 83 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:02,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:56:02,694 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:56:02,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:02,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:56:02,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:56:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash -107419740, now seen corresponding path program 8 times [2022-11-18 19:56:02,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:56:02,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560777908] [2022-11-18 19:56:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:02,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:56:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:08,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:56:08,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560777908] [2022-11-18 19:56:08,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560777908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:56:08,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682609995] [2022-11-18 19:56:08,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:56:08,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:56:08,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:56:08,195 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:56:08,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:56:08,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:56:08,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:56:08,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 19:56:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:08,357 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 [2022-11-18 19:56:08,534 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:56:08,534 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 11 treesize of output 11 [2022-11-18 19:56:09,401 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 34 treesize of output 34 [2022-11-18 19:56:09,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:09,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:56:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:56:09,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:56:09,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682609995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:56:09,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:56:09,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-11-18 19:56:09,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166898075] [2022-11-18 19:56:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:56:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:56:09,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:56:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:56:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 19:56:09,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-18 19:56:09,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 313 transitions, 2734 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:09,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:56:09,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-18 19:56:09,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:56:12,033 INFO L130 PetriNetUnfolder]: 975/3039 cut-off events. [2022-11-18 19:56:12,033 INFO L131 PetriNetUnfolder]: For 25062/25339 co-relation queries the response was YES. [2022-11-18 19:56:12,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13656 conditions, 3039 events. 975/3039 cut-off events. For 25062/25339 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 25348 event pairs, 178 based on Foata normal form. 100/2968 useless extension candidates. Maximal degree in co-relation 13592. Up to 1162 conditions per place. [2022-11-18 19:56:12,074 INFO L137 encePairwiseOnDemand]: 132/154 looper letters, 184 selfloop transitions, 59 changer transitions 56/381 dead transitions. [2022-11-18 19:56:12,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 381 transitions, 3926 flow [2022-11-18 19:56:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:56:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 19:56:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1795 transitions. [2022-11-18 19:56:12,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5550401978973407 [2022-11-18 19:56:12,078 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1795 transitions. [2022-11-18 19:56:12,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1795 transitions. [2022-11-18 19:56:12,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:56:12,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1795 transitions. [2022-11-18 19:56:12,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.47619047619048) internal successors, (1795), 21 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:12,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:12,086 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:12,086 INFO L175 Difference]: Start difference. First operand has 296 places, 313 transitions, 2734 flow. Second operand 21 states and 1795 transitions. [2022-11-18 19:56:12,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 381 transitions, 3926 flow [2022-11-18 19:56:12,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 381 transitions, 3671 flow, removed 93 selfloop flow, removed 34 redundant places. [2022-11-18 19:56:12,182 INFO L231 Difference]: Finished difference. Result has 283 places, 302 transitions, 2572 flow [2022-11-18 19:56:12,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2572, PETRI_PLACES=283, PETRI_TRANSITIONS=302} [2022-11-18 19:56:12,183 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 142 predicate places. [2022-11-18 19:56:12,183 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 302 transitions, 2572 flow [2022-11-18 19:56:12,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:12,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:56:12,184 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:56:12,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:12,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:56:12,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:56:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:12,390 INFO L85 PathProgramCache]: Analyzing trace with hash 942891982, now seen corresponding path program 9 times [2022-11-18 19:56:12,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:56:12,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380510484] [2022-11-18 19:56:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:12,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:56:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:17,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:56:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380510484] [2022-11-18 19:56:17,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380510484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:56:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909302293] [2022-11-18 19:56:17,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:56:17,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:56:17,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:56:17,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:56:17,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:56:18,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:56:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:56:18,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 19:56:18,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:18,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:18,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:56:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:56:18,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:56:18,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909302293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:56:18,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:56:18,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [38] total 46 [2022-11-18 19:56:18,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950729135] [2022-11-18 19:56:18,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:56:18,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:56:18,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:56:18,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:56:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 19:56:18,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-18 19:56:18,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 302 transitions, 2572 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:18,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:56:18,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-18 19:56:18,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:56:20,259 INFO L130 PetriNetUnfolder]: 909/2824 cut-off events. [2022-11-18 19:56:20,259 INFO L131 PetriNetUnfolder]: For 24439/24810 co-relation queries the response was YES. [2022-11-18 19:56:20,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12731 conditions, 2824 events. 909/2824 cut-off events. For 24439/24810 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 23124 event pairs, 169 based on Foata normal form. 141/2780 useless extension candidates. Maximal degree in co-relation 12664. Up to 1062 conditions per place. [2022-11-18 19:56:20,288 INFO L137 encePairwiseOnDemand]: 138/154 looper letters, 170 selfloop transitions, 63 changer transitions 45/378 dead transitions. [2022-11-18 19:56:20,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 378 transitions, 3821 flow [2022-11-18 19:56:20,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:56:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 19:56:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1398 transitions. [2022-11-18 19:56:20,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6983016983016983 [2022-11-18 19:56:20,291 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1398 transitions. [2022-11-18 19:56:20,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1398 transitions. [2022-11-18 19:56:20,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:56:20,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1398 transitions. [2022-11-18 19:56:20,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.53846153846153) internal successors, (1398), 13 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:20,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:20,294 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:20,294 INFO L175 Difference]: Start difference. First operand has 283 places, 302 transitions, 2572 flow. Second operand 13 states and 1398 transitions. [2022-11-18 19:56:20,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 378 transitions, 3821 flow [2022-11-18 19:56:20,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 378 transitions, 3652 flow, removed 33 selfloop flow, removed 21 redundant places. [2022-11-18 19:56:20,372 INFO L231 Difference]: Finished difference. Result has 271 places, 307 transitions, 2682 flow [2022-11-18 19:56:20,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2682, PETRI_PLACES=271, PETRI_TRANSITIONS=307} [2022-11-18 19:56:20,373 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 130 predicate places. [2022-11-18 19:56:20,374 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 307 transitions, 2682 flow [2022-11-18 19:56:20,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:20,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:56:20,375 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:56:20,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:20,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:56:20,586 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:56:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash -227094194, now seen corresponding path program 10 times [2022-11-18 19:56:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:56:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546856658] [2022-11-18 19:56:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:56:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:56:23,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546856658] [2022-11-18 19:56:23,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546856658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:56:23,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307739841] [2022-11-18 19:56:23,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:56:23,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:56:23,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:56:23,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:56:23,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:56:23,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:56:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:56:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:56:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:56:24,890 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 34 treesize of output 34 [2022-11-18 19:56:25,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:25,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:56:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:25,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:56:26,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:26,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 204 [2022-11-18 19:56:26,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:26,848 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 135 treesize of output 109 [2022-11-18 19:56:26,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:26,868 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 109 treesize of output 83 [2022-11-18 19:56:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:29,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307739841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:56:29,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:56:29,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 75 [2022-11-18 19:56:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357498927] [2022-11-18 19:56:29,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:56:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-18 19:56:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:56:29,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-18 19:56:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=5235, Unknown=20, NotChecked=0, Total=5550 [2022-11-18 19:56:29,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 154 [2022-11-18 19:56:29,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 307 transitions, 2682 flow. Second operand has 75 states, 75 states have (on average 70.54666666666667) internal successors, (5291), 75 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:29,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:56:29,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 154 [2022-11-18 19:56:29,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:56:42,210 INFO L130 PetriNetUnfolder]: 968/3036 cut-off events. [2022-11-18 19:56:42,211 INFO L131 PetriNetUnfolder]: For 25586/25860 co-relation queries the response was YES. [2022-11-18 19:56:42,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13692 conditions, 3036 events. 968/3036 cut-off events. For 25586/25860 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 25276 event pairs, 203 based on Foata normal form. 102/2970 useless extension candidates. Maximal degree in co-relation 13626. Up to 506 conditions per place. [2022-11-18 19:56:42,239 INFO L137 encePairwiseOnDemand]: 119/154 looper letters, 256 selfloop transitions, 92 changer transitions 104/513 dead transitions. [2022-11-18 19:56:42,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 513 transitions, 5363 flow [2022-11-18 19:56:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-18 19:56:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-18 19:56:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4137 transitions. [2022-11-18 19:56:42,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4797077922077922 [2022-11-18 19:56:42,247 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4137 transitions. [2022-11-18 19:56:42,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4137 transitions. [2022-11-18 19:56:42,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:56:42,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4137 transitions. [2022-11-18 19:56:42,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 73.875) internal successors, (4137), 56 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:42,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 154.0) internal successors, (8778), 57 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:42,268 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 154.0) internal successors, (8778), 57 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:42,268 INFO L175 Difference]: Start difference. First operand has 271 places, 307 transitions, 2682 flow. Second operand 56 states and 4137 transitions. [2022-11-18 19:56:42,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 513 transitions, 5363 flow [2022-11-18 19:56:42,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 513 transitions, 5207 flow, removed 33 selfloop flow, removed 10 redundant places. [2022-11-18 19:56:42,349 INFO L231 Difference]: Finished difference. Result has 327 places, 299 transitions, 2704 flow [2022-11-18 19:56:42,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2704, PETRI_PLACES=327, PETRI_TRANSITIONS=299} [2022-11-18 19:56:42,350 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 186 predicate places. [2022-11-18 19:56:42,350 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 299 transitions, 2704 flow [2022-11-18 19:56:42,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 70.54666666666667) internal successors, (5291), 75 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:42,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:56:42,352 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:56:42,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:56:42,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:56:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1939512484, now seen corresponding path program 11 times [2022-11-18 19:56:42,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:56:42,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876752087] [2022-11-18 19:56:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:42,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:56:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:47,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:56:47,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876752087] [2022-11-18 19:56:47,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876752087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:56:47,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473462972] [2022-11-18 19:56:47,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:56:47,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:56:47,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:56:47,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:56:47,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:56:47,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 19:56:47,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:56:47,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:56:47,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:49,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:49,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-11-18 19:56:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:49,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:56:50,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:50,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 76 [2022-11-18 19:56:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:52,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473462972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:56:52,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:56:52,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 26, 21] total 74 [2022-11-18 19:56:52,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778936891] [2022-11-18 19:56:52,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:56:52,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-18 19:56:52,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:56:52,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-18 19:56:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=4847, Unknown=0, NotChecked=0, Total=5402 [2022-11-18 19:56:52,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-11-18 19:56:52,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 299 transitions, 2704 flow. Second operand has 74 states, 74 states have (on average 69.6891891891892) internal successors, (5157), 74 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:52,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:56:52,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-11-18 19:56:52,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:57:08,594 INFO L130 PetriNetUnfolder]: 1098/3474 cut-off events. [2022-11-18 19:57:08,594 INFO L131 PetriNetUnfolder]: For 32804/33071 co-relation queries the response was YES. [2022-11-18 19:57:08,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16179 conditions, 3474 events. 1098/3474 cut-off events. For 32804/33071 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 30169 event pairs, 152 based on Foata normal form. 76/3361 useless extension candidates. Maximal degree in co-relation 16102. Up to 491 conditions per place. [2022-11-18 19:57:08,631 INFO L137 encePairwiseOnDemand]: 112/154 looper letters, 217 selfloop transitions, 175 changer transitions 87/539 dead transitions. [2022-11-18 19:57:08,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 539 transitions, 6106 flow [2022-11-18 19:57:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 19:57:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-18 19:57:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4417 transitions. [2022-11-18 19:57:08,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.470193740685544 [2022-11-18 19:57:08,638 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4417 transitions. [2022-11-18 19:57:08,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4417 transitions. [2022-11-18 19:57:08,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:57:08,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4417 transitions. [2022-11-18 19:57:08,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 72.40983606557377) internal successors, (4417), 61 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:08,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 154.0) internal successors, (9548), 62 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:08,659 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 154.0) internal successors, (9548), 62 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:08,659 INFO L175 Difference]: Start difference. First operand has 327 places, 299 transitions, 2704 flow. Second operand 61 states and 4417 transitions. [2022-11-18 19:57:08,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 539 transitions, 6106 flow [2022-11-18 19:57:08,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 539 transitions, 5720 flow, removed 88 selfloop flow, removed 53 redundant places. [2022-11-18 19:57:08,755 INFO L231 Difference]: Finished difference. Result has 340 places, 353 transitions, 3814 flow [2022-11-18 19:57:08,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=3814, PETRI_PLACES=340, PETRI_TRANSITIONS=353} [2022-11-18 19:57:08,756 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 199 predicate places. [2022-11-18 19:57:08,756 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 353 transitions, 3814 flow [2022-11-18 19:57:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 69.6891891891892) internal successors, (5157), 74 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:08,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:57:08,757 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:08,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:08,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:57:08,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:57:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1125183562, now seen corresponding path program 12 times [2022-11-18 19:57:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:08,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42021892] [2022-11-18 19:57:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:13,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42021892] [2022-11-18 19:57:13,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42021892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669431589] [2022-11-18 19:57:13,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:57:13,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:13,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:13,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:13,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:57:13,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-18 19:57:13,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:13,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 19:57:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:13,921 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 [2022-11-18 19:57:14,107 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:57:14,108 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 11 treesize of output 11 [2022-11-18 19:57:14,921 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 34 treesize of output 34 [2022-11-18 19:57:15,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:15,202 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 51 treesize of output 17 [2022-11-18 19:57:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:57:15,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:57:15,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669431589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:15,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:57:15,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [39] total 54 [2022-11-18 19:57:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608468415] [2022-11-18 19:57:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:15,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:57:15,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:57:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2714, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 19:57:15,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-18 19:57:15,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 353 transitions, 3814 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:15,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:57:15,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-18 19:57:15,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:57:17,764 INFO L130 PetriNetUnfolder]: 1178/3740 cut-off events. [2022-11-18 19:57:17,764 INFO L131 PetriNetUnfolder]: For 43897/44119 co-relation queries the response was YES. [2022-11-18 19:57:17,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18511 conditions, 3740 events. 1178/3740 cut-off events. For 43897/44119 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 33275 event pairs, 254 based on Foata normal form. 70/3589 useless extension candidates. Maximal degree in co-relation 18430. Up to 1591 conditions per place. [2022-11-18 19:57:17,810 INFO L137 encePairwiseOnDemand]: 132/154 looper letters, 233 selfloop transitions, 59 changer transitions 53/427 dead transitions. [2022-11-18 19:57:17,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 427 transitions, 5333 flow [2022-11-18 19:57:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:57:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 19:57:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1793 transitions. [2022-11-18 19:57:17,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2022-11-18 19:57:17,814 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1793 transitions. [2022-11-18 19:57:17,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1793 transitions. [2022-11-18 19:57:17,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:57:17,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1793 transitions. [2022-11-18 19:57:17,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:17,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:17,821 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:17,821 INFO L175 Difference]: Start difference. First operand has 340 places, 353 transitions, 3814 flow. Second operand 21 states and 1793 transitions. [2022-11-18 19:57:17,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 427 transitions, 5333 flow [2022-11-18 19:57:17,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 427 transitions, 5047 flow, removed 97 selfloop flow, removed 45 redundant places. [2022-11-18 19:57:17,983 INFO L231 Difference]: Finished difference. Result has 309 places, 355 transitions, 3747 flow [2022-11-18 19:57:17,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3747, PETRI_PLACES=309, PETRI_TRANSITIONS=355} [2022-11-18 19:57:17,984 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 168 predicate places. [2022-11-18 19:57:17,984 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 355 transitions, 3747 flow [2022-11-18 19:57:17,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:17,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:57:17,985 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:17,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:18,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:18,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:57:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1122082126, now seen corresponding path program 13 times [2022-11-18 19:57:18,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:18,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955287827] [2022-11-18 19:57:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:18,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:23,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:23,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955287827] [2022-11-18 19:57:23,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955287827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:23,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450832930] [2022-11-18 19:57:23,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:57:23,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:23,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:23,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:23,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:57:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:23,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 19:57:23,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:23,256 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 [2022-11-18 19:57:23,632 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:57:23,632 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 11 treesize of output 11 [2022-11-18 19:57:25,143 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 33 treesize of output 33 [2022-11-18 19:57:25,842 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-18 19:57:25,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 23 [2022-11-18 19:57:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:26,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:27,076 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-18 19:57:27,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 105 [2022-11-18 19:57:27,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:27,085 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 20 treesize of output 7 [2022-11-18 19:57:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:31,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450832930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:31,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:31,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 83 [2022-11-18 19:57:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559026216] [2022-11-18 19:57:31,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:31,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-18 19:57:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:31,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-18 19:57:31,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=6443, Unknown=1, NotChecked=0, Total=6806 [2022-11-18 19:57:31,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-11-18 19:57:31,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 355 transitions, 3747 flow. Second operand has 83 states, 83 states have (on average 66.46987951807229) internal successors, (5517), 83 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:31,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:57:31,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-11-18 19:57:31,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:57:51,476 INFO L130 PetriNetUnfolder]: 1181/3754 cut-off events. [2022-11-18 19:57:51,476 INFO L131 PetriNetUnfolder]: For 45052/45359 co-relation queries the response was YES. [2022-11-18 19:57:51,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18837 conditions, 3754 events. 1181/3754 cut-off events. For 45052/45359 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 33772 event pairs, 155 based on Foata normal form. 89/3622 useless extension candidates. Maximal degree in co-relation 18763. Up to 535 conditions per place. [2022-11-18 19:57:51,525 INFO L137 encePairwiseOnDemand]: 109/154 looper letters, 248 selfloop transitions, 176 changer transitions 42/523 dead transitions. [2022-11-18 19:57:51,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 523 transitions, 6621 flow [2022-11-18 19:57:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 19:57:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-18 19:57:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3733 transitions. [2022-11-18 19:57:51,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4488936988936989 [2022-11-18 19:57:51,538 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3733 transitions. [2022-11-18 19:57:51,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3733 transitions. [2022-11-18 19:57:51,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:57:51,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3733 transitions. [2022-11-18 19:57:51,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 69.12962962962963) internal successors, (3733), 54 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:51,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 154.0) internal successors, (8470), 55 states have internal predecessors, (8470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:51,569 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 154.0) internal successors, (8470), 55 states have internal predecessors, (8470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:51,569 INFO L175 Difference]: Start difference. First operand has 309 places, 355 transitions, 3747 flow. Second operand 54 states and 3733 transitions. [2022-11-18 19:57:51,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 523 transitions, 6621 flow [2022-11-18 19:57:51,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 523 transitions, 6476 flow, removed 31 selfloop flow, removed 20 redundant places. [2022-11-18 19:57:51,710 INFO L231 Difference]: Finished difference. Result has 344 places, 391 transitions, 4585 flow [2022-11-18 19:57:51,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=4585, PETRI_PLACES=344, PETRI_TRANSITIONS=391} [2022-11-18 19:57:51,712 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 203 predicate places. [2022-11-18 19:57:51,712 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 391 transitions, 4585 flow [2022-11-18 19:57:51,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 66.46987951807229) internal successors, (5517), 83 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:51,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:57:51,714 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:51,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 19:57:51,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 19:57:51,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:57:51,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash 787081768, now seen corresponding path program 14 times [2022-11-18 19:57:51,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:51,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887309936] [2022-11-18 19:57:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:51,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887309936] [2022-11-18 19:57:57,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887309936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:57,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489873560] [2022-11-18 19:57:57,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:57,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:57,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:57,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:57,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:57:57,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:57:57,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 19:57:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:57,176 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 [2022-11-18 19:57:57,365 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:57:57,365 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 11 treesize of output 11 [2022-11-18 19:57:58,172 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 34 treesize of output 34 [2022-11-18 19:57:58,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:58,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:57:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:57:58,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:57:58,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489873560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:58,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:57:58,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [36] total 51 [2022-11-18 19:57:58,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824813222] [2022-11-18 19:57:58,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:58,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:57:58,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:57:58,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 19:57:58,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-18 19:57:58,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 391 transitions, 4585 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:58,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:57:58,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-18 19:57:58,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:01,012 INFO L130 PetriNetUnfolder]: 1204/3927 cut-off events. [2022-11-18 19:58:01,013 INFO L131 PetriNetUnfolder]: For 51951/52209 co-relation queries the response was YES. [2022-11-18 19:58:01,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20370 conditions, 3927 events. 1204/3927 cut-off events. For 51951/52209 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 35957 event pairs, 252 based on Foata normal form. 86/3786 useless extension candidates. Maximal degree in co-relation 20294. Up to 1575 conditions per place. [2022-11-18 19:58:01,052 INFO L137 encePairwiseOnDemand]: 132/154 looper letters, 255 selfloop transitions, 68 changer transitions 47/452 dead transitions. [2022-11-18 19:58:01,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 452 transitions, 6000 flow [2022-11-18 19:58:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:58:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 19:58:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1794 transitions. [2022-11-18 19:58:01,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5547309833024119 [2022-11-18 19:58:01,056 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1794 transitions. [2022-11-18 19:58:01,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1794 transitions. [2022-11-18 19:58:01,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:01,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1794 transitions. [2022-11-18 19:58:01,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:01,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:01,064 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:01,064 INFO L175 Difference]: Start difference. First operand has 344 places, 391 transitions, 4585 flow. Second operand 21 states and 1794 transitions. [2022-11-18 19:58:01,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 452 transitions, 6000 flow [2022-11-18 19:58:01,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 452 transitions, 5715 flow, removed 60 selfloop flow, removed 41 redundant places. [2022-11-18 19:58:01,247 INFO L231 Difference]: Finished difference. Result has 324 places, 387 transitions, 4448 flow [2022-11-18 19:58:01,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4448, PETRI_PLACES=324, PETRI_TRANSITIONS=387} [2022-11-18 19:58:01,249 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 183 predicate places. [2022-11-18 19:58:01,249 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 387 transitions, 4448 flow [2022-11-18 19:58:01,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:01,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:01,249 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:01,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:58:01,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 19:58:01,455 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:58:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1698876290, now seen corresponding path program 15 times [2022-11-18 19:58:01,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:01,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865371275] [2022-11-18 19:58:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:06,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865371275] [2022-11-18 19:58:06,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865371275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:58:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798791050] [2022-11-18 19:58:06,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:58:06,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:58:06,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:58:06,250 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:58:06,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 19:58:06,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:58:06,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:58:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 19:58:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:58:07,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:58:07,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:58:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:58:07,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:58:07,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798791050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:58:07,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:58:07,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-11-18 19:58:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95125263] [2022-11-18 19:58:07,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:58:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:58:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:58:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:58:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 19:58:07,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-18 19:58:07,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 387 transitions, 4448 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:07,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:58:07,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-18 19:58:07,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:08,729 INFO L130 PetriNetUnfolder]: 1150/3732 cut-off events. [2022-11-18 19:58:08,729 INFO L131 PetriNetUnfolder]: For 51076/51300 co-relation queries the response was YES. [2022-11-18 19:58:08,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19456 conditions, 3732 events. 1150/3732 cut-off events. For 51076/51300 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 33728 event pairs, 243 based on Foata normal form. 58/3569 useless extension candidates. Maximal degree in co-relation 19379. Up to 1696 conditions per place. [2022-11-18 19:58:08,768 INFO L137 encePairwiseOnDemand]: 139/154 looper letters, 255 selfloop transitions, 56 changer transitions 44/455 dead transitions. [2022-11-18 19:58:08,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 455 transitions, 5902 flow [2022-11-18 19:58:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:58:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 19:58:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1388 transitions. [2022-11-18 19:58:08,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6933066933066933 [2022-11-18 19:58:08,771 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1388 transitions. [2022-11-18 19:58:08,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1388 transitions. [2022-11-18 19:58:08,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:08,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1388 transitions. [2022-11-18 19:58:08,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 106.76923076923077) internal successors, (1388), 13 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:08,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:08,776 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:08,776 INFO L175 Difference]: Start difference. First operand has 324 places, 387 transitions, 4448 flow. Second operand 13 states and 1388 transitions. [2022-11-18 19:58:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 455 transitions, 5902 flow [2022-11-18 19:58:08,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 455 transitions, 5744 flow, removed 25 selfloop flow, removed 20 redundant places. [2022-11-18 19:58:08,929 INFO L231 Difference]: Finished difference. Result has 316 places, 395 transitions, 4610 flow [2022-11-18 19:58:08,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4610, PETRI_PLACES=316, PETRI_TRANSITIONS=395} [2022-11-18 19:58:08,930 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 175 predicate places. [2022-11-18 19:58:08,930 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 395 transitions, 4610 flow [2022-11-18 19:58:08,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:08,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:08,930 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:08,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 19:58:09,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 19:58:09,131 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:58:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2037901656, now seen corresponding path program 16 times [2022-11-18 19:58:09,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:09,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002303637] [2022-11-18 19:58:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:09,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:13,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:13,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002303637] [2022-11-18 19:58:13,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002303637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:58:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283045226] [2022-11-18 19:58:13,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:58:13,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:58:13,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:58:13,176 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:58:13,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 19:58:13,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:58:13,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:58:13,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-18 19:58:13,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:58:14,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:58:14,932 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 20 treesize of output 22 [2022-11-18 19:58:15,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:58:15,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:58:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:15,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:58:17,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:58:17,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 126 [2022-11-18 19:58:17,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:58:17,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 60 [2022-11-18 19:58:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:20,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283045226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:58:20,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:58:20,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28, 28] total 86 [2022-11-18 19:58:20,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679158606] [2022-11-18 19:58:20,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:58:20,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-18 19:58:20,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:58:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-18 19:58:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=6944, Unknown=1, NotChecked=0, Total=7310 [2022-11-18 19:58:20,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-11-18 19:58:20,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 395 transitions, 4610 flow. Second operand has 86 states, 86 states have (on average 69.34883720930233) internal successors, (5964), 86 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:20,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:58:20,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-11-18 19:58:20,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:42,751 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:58:56,656 INFO L130 PetriNetUnfolder]: 1272/4121 cut-off events. [2022-11-18 19:58:56,656 INFO L131 PetriNetUnfolder]: For 55442/55762 co-relation queries the response was YES. [2022-11-18 19:58:56,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21305 conditions, 4121 events. 1272/4121 cut-off events. For 55442/55762 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 37557 event pairs, 253 based on Foata normal form. 84/4000 useless extension candidates. Maximal degree in co-relation 21227. Up to 654 conditions per place. [2022-11-18 19:58:56,692 INFO L137 encePairwiseOnDemand]: 110/154 looper letters, 293 selfloop transitions, 190 changer transitions 89/632 dead transitions. [2022-11-18 19:58:56,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 632 transitions, 8213 flow [2022-11-18 19:58:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-18 19:58:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-11-18 19:58:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5715 transitions. [2022-11-18 19:58:56,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46387987012987014 [2022-11-18 19:58:56,700 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5715 transitions. [2022-11-18 19:58:56,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5715 transitions. [2022-11-18 19:58:56,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:56,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5715 transitions. [2022-11-18 19:58:56,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 71.4375) internal successors, (5715), 80 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:56,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 154.0) internal successors, (12474), 81 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:56,723 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 154.0) internal successors, (12474), 81 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:56,724 INFO L175 Difference]: Start difference. First operand has 316 places, 395 transitions, 4610 flow. Second operand 80 states and 5715 transitions. [2022-11-18 19:58:56,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 632 transitions, 8213 flow [2022-11-18 19:58:56,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 632 transitions, 8024 flow, removed 57 selfloop flow, removed 9 redundant places. [2022-11-18 19:58:56,917 INFO L231 Difference]: Finished difference. Result has 401 places, 407 transitions, 5099 flow [2022-11-18 19:58:56,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=5099, PETRI_PLACES=401, PETRI_TRANSITIONS=407} [2022-11-18 19:58:56,918 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 260 predicate places. [2022-11-18 19:58:56,918 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 407 transitions, 5099 flow [2022-11-18 19:58:56,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 69.34883720930233) internal successors, (5964), 86 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:56,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:56,920 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:56,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 19:58:57,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 19:58:57,127 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:58:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash -711423983, now seen corresponding path program 1 times [2022-11-18 19:58:57,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:57,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057878835] [2022-11-18 19:58:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:57,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:58:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057878835] [2022-11-18 19:58:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057878835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:58:57,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:58:57,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:58:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072863922] [2022-11-18 19:58:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:58:57,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:58:57,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:58:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:58:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:58:57,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-18 19:58:57,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 407 transitions, 5099 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:57,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:58:57,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-18 19:58:57,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:59,436 INFO L130 PetriNetUnfolder]: 2566/7985 cut-off events. [2022-11-18 19:58:59,436 INFO L131 PetriNetUnfolder]: For 79569/80852 co-relation queries the response was YES. [2022-11-18 19:58:59,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35950 conditions, 7985 events. 2566/7985 cut-off events. For 79569/80852 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 85133 event pairs, 894 based on Foata normal form. 93/7247 useless extension candidates. Maximal degree in co-relation 35857. Up to 1749 conditions per place. [2022-11-18 19:58:59,539 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 247 selfloop transitions, 7 changer transitions 0/511 dead transitions. [2022-11-18 19:58:59,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 511 transitions, 7309 flow [2022-11-18 19:58:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:58:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:58:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2022-11-18 19:58:59,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8961038961038961 [2022-11-18 19:58:59,540 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2022-11-18 19:58:59,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2022-11-18 19:58:59,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:59,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2022-11-18 19:58:59,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,542 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,543 INFO L175 Difference]: Start difference. First operand has 401 places, 407 transitions, 5099 flow. Second operand 5 states and 690 transitions. [2022-11-18 19:58:59,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 511 transitions, 7309 flow [2022-11-18 19:58:59,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 511 transitions, 6981 flow, removed 83 selfloop flow, removed 53 redundant places. [2022-11-18 19:58:59,878 INFO L231 Difference]: Finished difference. Result has 333 places, 413 transitions, 4898 flow [2022-11-18 19:58:59,878 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4847, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4898, PETRI_PLACES=333, PETRI_TRANSITIONS=413} [2022-11-18 19:58:59,879 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 192 predicate places. [2022-11-18 19:58:59,879 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 413 transitions, 4898 flow [2022-11-18 19:58:59,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:59,880 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:59,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 19:58:59,880 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:58:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:59,880 INFO L85 PathProgramCache]: Analyzing trace with hash -759227497, now seen corresponding path program 2 times [2022-11-18 19:58:59,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:59,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399970214] [2022-11-18 19:58:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:59,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:00,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:00,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399970214] [2022-11-18 19:59:00,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399970214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677827470] [2022-11-18 19:59:00,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:59:00,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:00,047 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:00,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 19:59:00,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:59:00,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:00,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:59:00,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:00,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:00,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677827470] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:00,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:00,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-11-18 19:59:00,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463203374] [2022-11-18 19:59:00,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:00,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:00,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:59:00,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-11-18 19:59:00,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 413 transitions, 4898 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:00,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:00,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-11-18 19:59:00,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:02,312 INFO L130 PetriNetUnfolder]: 2074/6999 cut-off events. [2022-11-18 19:59:02,312 INFO L131 PetriNetUnfolder]: For 65691/67080 co-relation queries the response was YES. [2022-11-18 19:59:02,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32696 conditions, 6999 events. 2074/6999 cut-off events. For 65691/67080 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 75355 event pairs, 512 based on Foata normal form. 175/6928 useless extension candidates. Maximal degree in co-relation 32616. Up to 1714 conditions per place. [2022-11-18 19:59:02,384 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 187 selfloop transitions, 9 changer transitions 0/458 dead transitions. [2022-11-18 19:59:02,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 458 transitions, 5969 flow [2022-11-18 19:59:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:59:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2022-11-18 19:59:02,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8993506493506493 [2022-11-18 19:59:02,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2022-11-18 19:59:02,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2022-11-18 19:59:02,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:02,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2022-11-18 19:59:02,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,387 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,387 INFO L175 Difference]: Start difference. First operand has 333 places, 413 transitions, 4898 flow. Second operand 4 states and 554 transitions. [2022-11-18 19:59:02,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 458 transitions, 5969 flow [2022-11-18 19:59:02,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 458 transitions, 5969 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:59:02,767 INFO L231 Difference]: Finished difference. Result has 339 places, 416 transitions, 4937 flow [2022-11-18 19:59:02,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4937, PETRI_PLACES=339, PETRI_TRANSITIONS=416} [2022-11-18 19:59:02,768 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 198 predicate places. [2022-11-18 19:59:02,769 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 416 transitions, 4937 flow [2022-11-18 19:59:02,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,769 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:02,769 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:02,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:02,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:02,970 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:59:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:02,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1218725841, now seen corresponding path program 3 times [2022-11-18 19:59:02,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:02,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794459242] [2022-11-18 19:59:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:02,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794459242] [2022-11-18 19:59:03,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794459242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:03,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:03,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:59:03,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879176901] [2022-11-18 19:59:03,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:03,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:59:03,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:59:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:59:03,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-18 19:59:03,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 416 transitions, 4937 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:03,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:03,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-18 19:59:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:05,434 INFO L130 PetriNetUnfolder]: 2676/8534 cut-off events. [2022-11-18 19:59:05,434 INFO L131 PetriNetUnfolder]: For 81615/82953 co-relation queries the response was YES. [2022-11-18 19:59:05,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42023 conditions, 8534 events. 2676/8534 cut-off events. For 81615/82953 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 93036 event pairs, 934 based on Foata normal form. 171/8373 useless extension candidates. Maximal degree in co-relation 41940. Up to 2495 conditions per place. [2022-11-18 19:59:05,546 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 213 selfloop transitions, 9 changer transitions 19/489 dead transitions. [2022-11-18 19:59:05,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 489 transitions, 6411 flow [2022-11-18 19:59:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:59:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:59:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 810 transitions. [2022-11-18 19:59:05,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8766233766233766 [2022-11-18 19:59:05,547 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 810 transitions. [2022-11-18 19:59:05,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 810 transitions. [2022-11-18 19:59:05,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:05,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 810 transitions. [2022-11-18 19:59:05,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:05,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:05,549 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:05,549 INFO L175 Difference]: Start difference. First operand has 339 places, 416 transitions, 4937 flow. Second operand 6 states and 810 transitions. [2022-11-18 19:59:05,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 489 transitions, 6411 flow [2022-11-18 19:59:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 489 transitions, 6397 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-18 19:59:05,886 INFO L231 Difference]: Finished difference. Result has 345 places, 410 transitions, 4860 flow [2022-11-18 19:59:05,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4860, PETRI_PLACES=345, PETRI_TRANSITIONS=410} [2022-11-18 19:59:05,887 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 204 predicate places. [2022-11-18 19:59:05,887 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 410 transitions, 4860 flow [2022-11-18 19:59:05,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:05,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:05,888 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:05,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 19:59:05,888 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:59:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1056147137, now seen corresponding path program 1 times [2022-11-18 19:59:05,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:05,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661022202] [2022-11-18 19:59:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:05,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:06,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:06,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661022202] [2022-11-18 19:59:06,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661022202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:06,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314542738] [2022-11-18 19:59:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:06,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:06,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:06,047 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:06,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 19:59:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:59:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:06,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:06,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314542738] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:06,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:06,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-11-18 19:59:06,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264120683] [2022-11-18 19:59:06,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:06,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:06,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:06,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:59:06,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-11-18 19:59:06,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 410 transitions, 4860 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:06,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:06,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-11-18 19:59:06,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:08,336 INFO L130 PetriNetUnfolder]: 1844/6644 cut-off events. [2022-11-18 19:59:08,336 INFO L131 PetriNetUnfolder]: For 66088/67323 co-relation queries the response was YES. [2022-11-18 19:59:08,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32563 conditions, 6644 events. 1844/6644 cut-off events. For 66088/67323 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 71942 event pairs, 534 based on Foata normal form. 265/6659 useless extension candidates. Maximal degree in co-relation 32478. Up to 1591 conditions per place. [2022-11-18 19:59:08,424 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 188 selfloop transitions, 8 changer transitions 4/455 dead transitions. [2022-11-18 19:59:08,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 455 transitions, 5979 flow [2022-11-18 19:59:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:59:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2022-11-18 19:59:08,425 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8993506493506493 [2022-11-18 19:59:08,425 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2022-11-18 19:59:08,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2022-11-18 19:59:08,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:08,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2022-11-18 19:59:08,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:08,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:08,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:08,428 INFO L175 Difference]: Start difference. First operand has 345 places, 410 transitions, 4860 flow. Second operand 4 states and 554 transitions. [2022-11-18 19:59:08,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 455 transitions, 5979 flow [2022-11-18 19:59:08,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 455 transitions, 5965 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-18 19:59:08,805 INFO L231 Difference]: Finished difference. Result has 345 places, 412 transitions, 4894 flow [2022-11-18 19:59:08,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4894, PETRI_PLACES=345, PETRI_TRANSITIONS=412} [2022-11-18 19:59:08,806 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 204 predicate places. [2022-11-18 19:59:08,806 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 412 transitions, 4894 flow [2022-11-18 19:59:08,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:08,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:08,807 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:08,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:09,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 19:59:09,007 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:59:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:09,008 INFO L85 PathProgramCache]: Analyzing trace with hash 488470113, now seen corresponding path program 4 times [2022-11-18 19:59:09,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:09,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34515673] [2022-11-18 19:59:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:09,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:09,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34515673] [2022-11-18 19:59:09,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34515673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:09,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:09,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:59:09,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307032163] [2022-11-18 19:59:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:09,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:59:09,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:59:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:59:09,170 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-18 19:59:09,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 412 transitions, 4894 flow. Second operand has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:09,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:09,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-18 19:59:09,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:11,307 INFO L130 PetriNetUnfolder]: 2493/7499 cut-off events. [2022-11-18 19:59:11,307 INFO L131 PetriNetUnfolder]: For 77095/78331 co-relation queries the response was YES. [2022-11-18 19:59:11,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39338 conditions, 7499 events. 2493/7499 cut-off events. For 77095/78331 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 77782 event pairs, 797 based on Foata normal form. 118/7352 useless extension candidates. Maximal degree in co-relation 39251. Up to 2160 conditions per place. [2022-11-18 19:59:11,397 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 203 selfloop transitions, 17 changer transitions 12/462 dead transitions. [2022-11-18 19:59:11,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 462 transitions, 5906 flow [2022-11-18 19:59:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:59:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:59:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 824 transitions. [2022-11-18 19:59:11,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8917748917748918 [2022-11-18 19:59:11,399 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 824 transitions. [2022-11-18 19:59:11,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 824 transitions. [2022-11-18 19:59:11,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:11,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 824 transitions. [2022-11-18 19:59:11,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.33333333333334) internal successors, (824), 6 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:11,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:11,401 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:11,401 INFO L175 Difference]: Start difference. First operand has 345 places, 412 transitions, 4894 flow. Second operand 6 states and 824 transitions. [2022-11-18 19:59:11,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 462 transitions, 5906 flow [2022-11-18 19:59:11,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 462 transitions, 5735 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-11-18 19:59:11,842 INFO L231 Difference]: Finished difference. Result has 344 places, 369 transitions, 3991 flow [2022-11-18 19:59:11,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4012, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3991, PETRI_PLACES=344, PETRI_TRANSITIONS=369} [2022-11-18 19:59:11,843 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 203 predicate places. [2022-11-18 19:59:11,843 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 369 transitions, 3991 flow [2022-11-18 19:59:11,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:11,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:11,844 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:11,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 19:59:11,844 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:59:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2123684359, now seen corresponding path program 2 times [2022-11-18 19:59:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283096902] [2022-11-18 19:59:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:59:12,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283096902] [2022-11-18 19:59:12,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283096902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:12,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:12,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:59:12,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482310953] [2022-11-18 19:59:12,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:12,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:59:12,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:12,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:59:12,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:59:12,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-18 19:59:12,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 369 transitions, 3991 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:12,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:12,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-18 19:59:12,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:13,995 INFO L130 PetriNetUnfolder]: 1847/5674 cut-off events. [2022-11-18 19:59:13,996 INFO L131 PetriNetUnfolder]: For 53227/54061 co-relation queries the response was YES. [2022-11-18 19:59:14,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29033 conditions, 5674 events. 1847/5674 cut-off events. For 53227/54061 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 54975 event pairs, 559 based on Foata normal form. 242/5740 useless extension candidates. Maximal degree in co-relation 28944. Up to 1493 conditions per place. [2022-11-18 19:59:14,048 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 124 selfloop transitions, 12 changer transitions 36/360 dead transitions. [2022-11-18 19:59:14,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 360 transitions, 3909 flow [2022-11-18 19:59:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:59:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:59:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 809 transitions. [2022-11-18 19:59:14,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8755411255411255 [2022-11-18 19:59:14,050 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 809 transitions. [2022-11-18 19:59:14,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 809 transitions. [2022-11-18 19:59:14,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:14,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 809 transitions. [2022-11-18 19:59:14,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:14,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:14,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:14,053 INFO L175 Difference]: Start difference. First operand has 344 places, 369 transitions, 3991 flow. Second operand 6 states and 809 transitions. [2022-11-18 19:59:14,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 360 transitions, 3909 flow [2022-11-18 19:59:14,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 360 transitions, 3705 flow, removed 38 selfloop flow, removed 16 redundant places. [2022-11-18 19:59:14,253 INFO L231 Difference]: Finished difference. Result has 331 places, 286 transitions, 2465 flow [2022-11-18 19:59:14,254 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2465, PETRI_PLACES=331, PETRI_TRANSITIONS=286} [2022-11-18 19:59:14,254 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 190 predicate places. [2022-11-18 19:59:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 286 transitions, 2465 flow [2022-11-18 19:59:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:14,255 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:14,255 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 19:59:14,255 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:59:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1405052740, now seen corresponding path program 17 times [2022-11-18 19:59:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:14,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641781603] [2022-11-18 19:59:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641781603] [2022-11-18 19:59:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641781603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771630077] [2022-11-18 19:59:20,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:59:20,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:20,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:20,115 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:20,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 19:59:20,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 19:59:20,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:59:20,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:20,269 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 [2022-11-18 19:59:20,463 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:59:20,463 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 11 treesize of output 11 [2022-11-18 19:59:21,409 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 20 treesize of output 22 [2022-11-18 19:59:21,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:21,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:59:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:59:22,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:22,719 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_~start~0 4))) (let ((.cse1 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse2 (mod |c_thread1Thread1of1ForFork2_~x~0#1| 4294967296)) (.cse5 (+ .cse10 c_~queue~0.offset 4)) (.cse6 (+ .cse10 c_~queue~0.offset))) (and (forall ((v_ArrVal_781 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_781) c_~queue~0.base))) (or (not (= (mod (select .cse0 .cse1) 4294967296) .cse2)) (let ((.cse3 (select .cse0 .cse6)) (.cse4 (select .cse0 .cse5))) (<= (+ (* (div .cse3 4294967296) 4294967296) .cse4) (+ .cse3 (* (div .cse4 4294967296) 4294967296))))))) (forall ((v_ArrVal_781 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_781) c_~queue~0.base))) (or (not (= (mod (select .cse7 .cse1) 4294967296) .cse2)) (let ((.cse8 (select .cse7 .cse6)) (.cse9 (select .cse7 .cse5))) (< (+ .cse8 (* (div .cse9 4294967296) 4294967296)) (+ (* (div .cse8 4294967296) 4294967296) .cse9 1))))))))) is different from false [2022-11-18 19:59:22,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:22,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 304 treesize of output 262 [2022-11-18 19:59:22,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:22,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 201 treesize of output 195 [2022-11-18 19:59:22,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:22,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 162 [2022-11-18 19:59:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 19:59:25,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771630077] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:25,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:25,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [38, 21] total 65 [2022-11-18 19:59:25,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284303837] [2022-11-18 19:59:25,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:25,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:59:25,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:25,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:59:25,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3838, Unknown=1, NotChecked=124, Total=4160 [2022-11-18 19:59:25,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-18 19:59:25,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 286 transitions, 2465 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:25,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:25,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-18 19:59:25,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:28,439 INFO L130 PetriNetUnfolder]: 1397/4790 cut-off events. [2022-11-18 19:59:28,439 INFO L131 PetriNetUnfolder]: For 43262/43521 co-relation queries the response was YES. [2022-11-18 19:59:28,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23269 conditions, 4790 events. 1397/4790 cut-off events. For 43262/43521 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 46270 event pairs, 433 based on Foata normal form. 114/4776 useless extension candidates. Maximal degree in co-relation 23184. Up to 1201 conditions per place. [2022-11-18 19:59:28,516 INFO L137 encePairwiseOnDemand]: 128/154 looper letters, 144 selfloop transitions, 52 changer transitions 43/349 dead transitions. [2022-11-18 19:59:28,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 349 transitions, 3531 flow [2022-11-18 19:59:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 19:59:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 19:59:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1876 transitions. [2022-11-18 19:59:28,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5537190082644629 [2022-11-18 19:59:28,519 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1876 transitions. [2022-11-18 19:59:28,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1876 transitions. [2022-11-18 19:59:28,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:28,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1876 transitions. [2022-11-18 19:59:28,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.27272727272727) internal successors, (1876), 22 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:28,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:28,526 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:28,526 INFO L175 Difference]: Start difference. First operand has 331 places, 286 transitions, 2465 flow. Second operand 22 states and 1876 transitions. [2022-11-18 19:59:28,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 349 transitions, 3531 flow [2022-11-18 19:59:28,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 349 transitions, 3282 flow, removed 111 selfloop flow, removed 12 redundant places. [2022-11-18 19:59:28,660 INFO L231 Difference]: Finished difference. Result has 338 places, 284 transitions, 2438 flow [2022-11-18 19:59:28,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2438, PETRI_PLACES=338, PETRI_TRANSITIONS=284} [2022-11-18 19:59:28,661 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 197 predicate places. [2022-11-18 19:59:28,662 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 284 transitions, 2438 flow [2022-11-18 19:59:28,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:28,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:28,663 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:28,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-18 19:59:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:28,869 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:59:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1972859952, now seen corresponding path program 18 times [2022-11-18 19:59:28,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:28,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859755079] [2022-11-18 19:59:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:40,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:40,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859755079] [2022-11-18 19:59:40,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859755079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:40,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449592318] [2022-11-18 19:59:40,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:59:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:40,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:40,803 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:40,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 19:59:40,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-18 19:59:40,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 19:59:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:41,016 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 [2022-11-18 19:59:41,282 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:59:41,282 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 11 treesize of output 11 [2022-11-18 19:59:42,503 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 34 treesize of output 34 [2022-11-18 19:59:42,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:42,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:59:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 19:59:43,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:43,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449592318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:43,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:59:43,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [40] total 55 [2022-11-18 19:59:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135917647] [2022-11-18 19:59:43,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:43,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:59:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:43,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:59:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2818, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 19:59:43,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-18 19:59:43,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 284 transitions, 2438 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:43,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:43,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-18 19:59:43,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:45,993 INFO L130 PetriNetUnfolder]: 1302/4430 cut-off events. [2022-11-18 19:59:45,993 INFO L131 PetriNetUnfolder]: For 37777/38035 co-relation queries the response was YES. [2022-11-18 19:59:46,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21473 conditions, 4430 events. 1302/4430 cut-off events. For 37777/38035 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 41842 event pairs, 404 based on Foata normal form. 84/4392 useless extension candidates. Maximal degree in co-relation 21386. Up to 1285 conditions per place. [2022-11-18 19:59:46,051 INFO L137 encePairwiseOnDemand]: 132/154 looper letters, 142 selfloop transitions, 34 changer transitions 57/343 dead transitions. [2022-11-18 19:59:46,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 343 transitions, 3361 flow [2022-11-18 19:59:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:59:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 19:59:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1793 transitions. [2022-11-18 19:59:46,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2022-11-18 19:59:46,054 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1793 transitions. [2022-11-18 19:59:46,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1793 transitions. [2022-11-18 19:59:46,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:46,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1793 transitions. [2022-11-18 19:59:46,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:46,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:46,060 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:46,060 INFO L175 Difference]: Start difference. First operand has 338 places, 284 transitions, 2438 flow. Second operand 21 states and 1793 transitions. [2022-11-18 19:59:46,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 343 transitions, 3361 flow [2022-11-18 19:59:46,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 343 transitions, 3209 flow, removed 34 selfloop flow, removed 21 redundant places. [2022-11-18 19:59:46,221 INFO L231 Difference]: Finished difference. Result has 336 places, 275 transitions, 2312 flow [2022-11-18 19:59:46,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2312, PETRI_PLACES=336, PETRI_TRANSITIONS=275} [2022-11-18 19:59:46,222 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 195 predicate places. [2022-11-18 19:59:46,222 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 275 transitions, 2312 flow [2022-11-18 19:59:46,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:46,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:46,223 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:46,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:46,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:46,431 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:59:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:46,431 INFO L85 PathProgramCache]: Analyzing trace with hash -864044380, now seen corresponding path program 19 times [2022-11-18 19:59:46,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:46,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046306375] [2022-11-18 19:59:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:46,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046306375] [2022-11-18 19:59:56,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046306375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217001064] [2022-11-18 19:59:56,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:59:56,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:56,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:56,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:56,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 19:59:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 19:59:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:56,725 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 [2022-11-18 19:59:56,809 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 19:59:56,810 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 14 [2022-11-18 19:59:57,168 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-18 19:59:57,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 19:59:58,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-11-18 19:59:58,406 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 21 treesize of output 23 [2022-11-18 19:59:58,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:58,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-11-18 19:59:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 19:59:59,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:59,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217001064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:59,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:59:59,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [40] total 57 [2022-11-18 19:59:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753916583] [2022-11-18 19:59:59,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:59,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:59:59,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:59:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 19:59:59,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 154 [2022-11-18 19:59:59,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 275 transitions, 2312 flow. Second operand has 21 states, 21 states have (on average 80.80952380952381) internal successors, (1697), 21 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:59,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:59,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 154 [2022-11-18 19:59:59,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:00:01,940 INFO L130 PetriNetUnfolder]: 1168/3945 cut-off events. [2022-11-18 20:00:01,940 INFO L131 PetriNetUnfolder]: For 32169/32368 co-relation queries the response was YES. [2022-11-18 20:00:01,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18412 conditions, 3945 events. 1168/3945 cut-off events. For 32169/32368 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 36245 event pairs, 397 based on Foata normal form. 46/3815 useless extension candidates. Maximal degree in co-relation 18325. Up to 1252 conditions per place. [2022-11-18 20:00:01,998 INFO L137 encePairwiseOnDemand]: 131/154 looper letters, 143 selfloop transitions, 37 changer transitions 48/338 dead transitions. [2022-11-18 20:00:01,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 338 transitions, 3292 flow [2022-11-18 20:00:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:00:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 20:00:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1850 transitions. [2022-11-18 20:00:02,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5460448642266824 [2022-11-18 20:00:02,002 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1850 transitions. [2022-11-18 20:00:02,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1850 transitions. [2022-11-18 20:00:02,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:00:02,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1850 transitions. [2022-11-18 20:00:02,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 84.0909090909091) internal successors, (1850), 22 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:02,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:02,012 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:02,012 INFO L175 Difference]: Start difference. First operand has 336 places, 275 transitions, 2312 flow. Second operand 22 states and 1850 transitions. [2022-11-18 20:00:02,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 338 transitions, 3292 flow [2022-11-18 20:00:02,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 338 transitions, 3145 flow, removed 32 selfloop flow, removed 24 redundant places. [2022-11-18 20:00:02,157 INFO L231 Difference]: Finished difference. Result has 331 places, 278 transitions, 2341 flow [2022-11-18 20:00:02,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2341, PETRI_PLACES=331, PETRI_TRANSITIONS=278} [2022-11-18 20:00:02,158 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 190 predicate places. [2022-11-18 20:00:02,158 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 278 transitions, 2341 flow [2022-11-18 20:00:02,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.80952380952381) internal successors, (1697), 21 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:02,159 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:00:02,159 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:02,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:02,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99378635-907b-4d55-aa0f-7884a876df2f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:02,360 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:00:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1286050482, now seen corresponding path program 20 times [2022-11-18 20:00:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:02,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978319566] [2022-11-18 20:00:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:02,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat