./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/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_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/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_3164e6bc-c019-4607-8b04-7d8875d9fb24/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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- 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 18:46:15,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:46:15,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:46:15,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:46:15,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:46:15,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:46:15,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:46:15,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:46:15,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:46:15,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:46:15,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:46:15,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:46:15,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:46:15,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:46:15,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:46:15,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:46:15,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:46:15,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:46:15,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:46:15,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:46:15,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:46:15,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:46:15,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:46:15,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:46:15,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:46:15,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:46:15,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:46:15,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:46:15,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:46:15,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:46:15,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:46:15,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:46:15,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:46:15,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:46:15,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:46:15,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:46:15,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:46:15,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:46:15,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:46:15,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:46:15,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:46:15,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:46:15,900 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:46:15,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:46:15,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:46:15,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:46:15,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:46:15,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:46:15,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:46:15,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:46:15,911 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:46:15,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:46:15,912 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:46:15,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:46:15,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:46:15,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:46:15,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:46:15,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:46:15,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:46:15,913 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:46:15,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:46:15,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:46:15,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:46:15,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:46:15,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:46:15,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:46:15,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:15,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:46:15,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:46:15,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:46:15,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:46:15,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:46:15,916 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:46:15,916 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:46:15,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:46:15,917 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_3164e6bc-c019-4607-8b04-7d8875d9fb24/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-18 18:46:16,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:46:16,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:46:16,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:46:16,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:46:16,199 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:46:16,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-18 18:46:16,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/data/f4b4e7b06/4a334836ca5a446a9c627ed72f96a8d0/FLAG338419eba [2022-11-18 18:46:16,707 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:46:16,708 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-18 18:46:16,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/data/f4b4e7b06/4a334836ca5a446a9c627ed72f96a8d0/FLAG338419eba [2022-11-18 18:46:17,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/data/f4b4e7b06/4a334836ca5a446a9c627ed72f96a8d0 [2022-11-18 18:46:17,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:46:17,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:46:17,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:17,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:46:17,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:46:17,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f8cc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17, skipping insertion in model container [2022-11-18 18:46:17,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:46:17,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:46:17,456 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_3164e6bc-c019-4607-8b04-7d8875d9fb24/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-18 18:46:17,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:17,492 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:46:17,516 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_3164e6bc-c019-4607-8b04-7d8875d9fb24/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-18 18:46:17,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:17,538 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:46:17,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17 WrapperNode [2022-11-18 18:46:17,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:17,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:17,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:46:17,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:46:17,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,581 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 161 [2022-11-18 18:46:17,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:17,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:46:17,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:46:17,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:46:17,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,608 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:46:17,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:46:17,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:46:17,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:46:17,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (1/1) ... [2022-11-18 18:46:17,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:17,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:17,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:46:17,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:46:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:46:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:46:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:46:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:46:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:46:17,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:46:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:46:17,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:46:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 18:46:17,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 18:46:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:46:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 18:46:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 18:46:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:46:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:46:17,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:46:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:46:17,713 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 18:46:17,813 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:46:17,816 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:46:18,254 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:46:18,353 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:46:18,353 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 18:46:18,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:18 BoogieIcfgContainer [2022-11-18 18:46:18,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:46:18,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:46:18,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:46:18,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:46:18,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:46:17" (1/3) ... [2022-11-18 18:46:18,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d4a22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:18, skipping insertion in model container [2022-11-18 18:46:18,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:17" (2/3) ... [2022-11-18 18:46:18,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d4a22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:18, skipping insertion in model container [2022-11-18 18:46:18,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:18" (3/3) ... [2022-11-18 18:46:18,367 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-11-18 18:46:18,377 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:46:18,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:46:18,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:46:18,388 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:46:18,484 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 18:46:18,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 142 transitions, 308 flow [2022-11-18 18:46:18,647 INFO L130 PetriNetUnfolder]: 10/139 cut-off events. [2022-11-18 18:46:18,647 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 18:46:18,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 10/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2022-11-18 18:46:18,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 142 transitions, 308 flow [2022-11-18 18:46:18,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 128 transitions, 274 flow [2022-11-18 18:46:18,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:46:18,681 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;@7a932271, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:46:18,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 18:46:18,750 INFO L130 PetriNetUnfolder]: 10/127 cut-off events. [2022-11-18 18:46:18,750 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 18:46:18,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:18,751 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] [2022-11-18 18:46:18,752 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 18:46:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash 69729634, now seen corresponding path program 1 times [2022-11-18 18:46:18,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:18,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534502104] [2022-11-18 18:46:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:18,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:19,142 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 18:46:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:19,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534502104] [2022-11-18 18:46:19,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534502104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:19,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:19,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:46:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43409250] [2022-11-18 18:46:19,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:19,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:46:19,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:19,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:46:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:46:19,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 142 [2022-11-18 18:46:19,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 18:46:19,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:19,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 142 [2022-11-18 18:46:19,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:19,297 INFO L130 PetriNetUnfolder]: 21/174 cut-off events. [2022-11-18 18:46:19,298 INFO L131 PetriNetUnfolder]: For 26/27 co-relation queries the response was YES. [2022-11-18 18:46:19,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 174 events. 21/174 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 306 event pairs, 7 based on Foata normal form. 20/176 useless extension candidates. Maximal degree in co-relation 141. Up to 33 conditions per place. [2022-11-18 18:46:19,301 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 9 selfloop transitions, 0 changer transitions 2/122 dead transitions. [2022-11-18 18:46:19,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 122 transitions, 280 flow [2022-11-18 18:46:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:46:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:46:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 267 transitions. [2022-11-18 18:46:19,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9401408450704225 [2022-11-18 18:46:19,317 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 267 transitions. [2022-11-18 18:46:19,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 267 transitions. [2022-11-18 18:46:19,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:19,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 267 transitions. [2022-11-18 18:46:19,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.5) internal successors, (267), 2 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 18:46:19,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 18:46:19,331 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 18:46:19,333 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 274 flow. Second operand 2 states and 267 transitions. [2022-11-18 18:46:19,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 122 transitions, 280 flow [2022-11-18 18:46:19,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 122 transitions, 268 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 18:46:19,342 INFO L231 Difference]: Finished difference. Result has 123 places, 120 transitions, 246 flow [2022-11-18 18:46:19,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=123, PETRI_TRANSITIONS=120} [2022-11-18 18:46:19,348 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, -5 predicate places. [2022-11-18 18:46:19,349 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 120 transitions, 246 flow [2022-11-18 18:46:19,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 18:46:19,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:19,350 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] [2022-11-18 18:46:19,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:46:19,351 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 18:46:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:19,352 INFO L85 PathProgramCache]: Analyzing trace with hash -208310033, now seen corresponding path program 1 times [2022-11-18 18:46:19,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:19,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972629118] [2022-11-18 18:46:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:19,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:19,772 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 18:46:19,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972629118] [2022-11-18 18:46:19,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972629118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:19,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:19,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:19,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128710254] [2022-11-18 18:46:19,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:19,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:19,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:19,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 142 [2022-11-18 18:46:19,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:19,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:19,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 142 [2022-11-18 18:46:19,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:20,000 INFO L130 PetriNetUnfolder]: 98/367 cut-off events. [2022-11-18 18:46:20,000 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:46:20,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 367 events. 98/367 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1433 event pairs, 20 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 540. Up to 64 conditions per place. [2022-11-18 18:46:20,010 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 35 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2022-11-18 18:46:20,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 142 transitions, 372 flow [2022-11-18 18:46:20,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:46:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:46:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2022-11-18 18:46:20,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8830985915492958 [2022-11-18 18:46:20,032 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2022-11-18 18:46:20,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2022-11-18 18:46:20,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:20,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2022-11-18 18:46:20,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 18:46:20,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 18:46:20,041 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 18:46:20,041 INFO L175 Difference]: Start difference. First operand has 123 places, 120 transitions, 246 flow. Second operand 5 states and 627 transitions. [2022-11-18 18:46:20,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 142 transitions, 372 flow [2022-11-18 18:46:20,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 142 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:46:20,046 INFO L231 Difference]: Finished difference. Result has 128 places, 123 transitions, 277 flow [2022-11-18 18:46:20,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=128, PETRI_TRANSITIONS=123} [2022-11-18 18:46:20,053 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-11-18 18:46:20,054 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 123 transitions, 277 flow [2022-11-18 18:46:20,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:20,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:20,055 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] [2022-11-18 18:46:20,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:46:20,056 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 18:46:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:20,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1290292121, now seen corresponding path program 2 times [2022-11-18 18:46:20,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:20,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538217423] [2022-11-18 18:46:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:20,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:20,425 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 18:46:20,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:20,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538217423] [2022-11-18 18:46:20,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538217423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:20,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:20,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:20,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160063485] [2022-11-18 18:46:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:20,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:20,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:20,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 142 [2022-11-18 18:46:20,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 123 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:20,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:20,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 142 [2022-11-18 18:46:20,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:20,628 INFO L130 PetriNetUnfolder]: 119/462 cut-off events. [2022-11-18 18:46:20,628 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-11-18 18:46:20,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 462 events. 119/462 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2173 event pairs, 16 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 767. Up to 79 conditions per place. [2022-11-18 18:46:20,633 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 36 selfloop transitions, 7 changer transitions 0/145 dead transitions. [2022-11-18 18:46:20,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 145 transitions, 431 flow [2022-11-18 18:46:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:46:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:46:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 626 transitions. [2022-11-18 18:46:20,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8816901408450705 [2022-11-18 18:46:20,637 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 626 transitions. [2022-11-18 18:46:20,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 626 transitions. [2022-11-18 18:46:20,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:20,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 626 transitions. [2022-11-18 18:46:20,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states 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 18:46:20,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 18:46:20,647 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 18:46:20,647 INFO L175 Difference]: Start difference. First operand has 128 places, 123 transitions, 277 flow. Second operand 5 states and 626 transitions. [2022-11-18 18:46:20,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 145 transitions, 431 flow [2022-11-18 18:46:20,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 145 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:46:20,658 INFO L231 Difference]: Finished difference. Result has 134 places, 127 transitions, 320 flow [2022-11-18 18:46:20,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=134, PETRI_TRANSITIONS=127} [2022-11-18 18:46:20,661 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 6 predicate places. [2022-11-18 18:46:20,661 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 127 transitions, 320 flow [2022-11-18 18:46:20,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:20,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:20,662 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] [2022-11-18 18:46:20,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:46:20,663 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 18:46:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1846626125, now seen corresponding path program 3 times [2022-11-18 18:46:20,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:20,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445927620] [2022-11-18 18:46:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:20,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:20,997 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 18:46:20,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:20,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445927620] [2022-11-18 18:46:20,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445927620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:20,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:20,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:46:20,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414321714] [2022-11-18 18:46:20,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:20,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:46:21,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:46:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:21,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 142 [2022-11-18 18:46:21,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 127 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 18:46:21,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:21,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 142 [2022-11-18 18:46:21,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:21,236 INFO L130 PetriNetUnfolder]: 211/627 cut-off events. [2022-11-18 18:46:21,237 INFO L131 PetriNetUnfolder]: For 255/262 co-relation queries the response was YES. [2022-11-18 18:46:21,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 627 events. 211/627 cut-off events. For 255/262 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3182 event pairs, 20 based on Foata normal form. 11/557 useless extension candidates. Maximal degree in co-relation 1237. Up to 122 conditions per place. [2022-11-18 18:46:21,243 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 43 selfloop transitions, 7 changer transitions 12/163 dead transitions. [2022-11-18 18:46:21,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 163 transitions, 575 flow [2022-11-18 18:46:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:46:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:46:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2022-11-18 18:46:21,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8682092555331992 [2022-11-18 18:46:21,247 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2022-11-18 18:46:21,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2022-11-18 18:46:21,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:21,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2022-11-18 18:46:21,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states 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 18:46:21,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 18:46:21,257 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 18:46:21,258 INFO L175 Difference]: Start difference. First operand has 134 places, 127 transitions, 320 flow. Second operand 7 states and 863 transitions. [2022-11-18 18:46:21,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 163 transitions, 575 flow [2022-11-18 18:46:21,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 163 transitions, 566 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:46:21,265 INFO L231 Difference]: Finished difference. Result has 141 places, 125 transitions, 325 flow [2022-11-18 18:46:21,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=325, PETRI_PLACES=141, PETRI_TRANSITIONS=125} [2022-11-18 18:46:21,274 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 13 predicate places. [2022-11-18 18:46:21,274 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 125 transitions, 325 flow [2022-11-18 18:46:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 18:46:21,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:21,275 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] [2022-11-18 18:46:21,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:46:21,275 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 18:46:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1188954514, now seen corresponding path program 1 times [2022-11-18 18:46:21,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:21,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327869701] [2022-11-18 18:46:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:21,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:21,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:21,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327869701] [2022-11-18 18:46:21,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327869701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:21,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:21,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:21,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521968310] [2022-11-18 18:46:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:21,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:46:21,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:46:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:46:21,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2022-11-18 18:46:21,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 125 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 18:46:21,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:21,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2022-11-18 18:46:21,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:21,633 INFO L130 PetriNetUnfolder]: 49/301 cut-off events. [2022-11-18 18:46:21,633 INFO L131 PetriNetUnfolder]: For 123/133 co-relation queries the response was YES. [2022-11-18 18:46:21,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 301 events. 49/301 cut-off events. For 123/133 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 927 event pairs, 9 based on Foata normal form. 13/288 useless extension candidates. Maximal degree in co-relation 499. Up to 70 conditions per place. [2022-11-18 18:46:21,636 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 16 selfloop transitions, 3 changer transitions 0/127 dead transitions. [2022-11-18 18:46:21,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 127 transitions, 357 flow [2022-11-18 18:46:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:46:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:46:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2022-11-18 18:46:21,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8967136150234741 [2022-11-18 18:46:21,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2022-11-18 18:46:21,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2022-11-18 18:46:21,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:21,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2022-11-18 18:46:21,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 18:46:21,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 18:46:21,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 18:46:21,643 INFO L175 Difference]: Start difference. First operand has 141 places, 125 transitions, 325 flow. Second operand 3 states and 382 transitions. [2022-11-18 18:46:21,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 127 transitions, 357 flow [2022-11-18 18:46:21,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 127 transitions, 333 flow, removed 1 selfloop flow, removed 11 redundant places. [2022-11-18 18:46:21,650 INFO L231 Difference]: Finished difference. Result has 133 places, 125 transitions, 305 flow [2022-11-18 18:46:21,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=133, PETRI_TRANSITIONS=125} [2022-11-18 18:46:21,653 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 5 predicate places. [2022-11-18 18:46:21,654 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 125 transitions, 305 flow [2022-11-18 18:46:21,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 18:46:21,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:21,655 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] [2022-11-18 18:46:21,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:46:21,655 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 18:46:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:21,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1722551952, now seen corresponding path program 1 times [2022-11-18 18:46:21,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:21,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315258297] [2022-11-18 18:46:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:21,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:22,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:22,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315258297] [2022-11-18 18:46:22,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315258297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:22,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:22,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:46:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294612158] [2022-11-18 18:46:22,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:22,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:22,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:22,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:22,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:22,154 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2022-11-18 18:46:22,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 125 transitions, 305 flow. Second operand has 10 states, 10 states have (on average 105.6) internal successors, (1056), 10 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states 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 18:46:22,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:22,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2022-11-18 18:46:22,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:22,665 INFO L130 PetriNetUnfolder]: 127/551 cut-off events. [2022-11-18 18:46:22,665 INFO L131 PetriNetUnfolder]: For 204/262 co-relation queries the response was YES. [2022-11-18 18:46:22,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 551 events. 127/551 cut-off events. For 204/262 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2545 event pairs, 23 based on Foata normal form. 60/573 useless extension candidates. Maximal degree in co-relation 1068. Up to 136 conditions per place. [2022-11-18 18:46:22,670 INFO L137 encePairwiseOnDemand]: 132/142 looper letters, 40 selfloop transitions, 6 changer transitions 22/158 dead transitions. [2022-11-18 18:46:22,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 158 transitions, 528 flow [2022-11-18 18:46:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:46:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 18:46:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1095 transitions. [2022-11-18 18:46:22,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7711267605633803 [2022-11-18 18:46:22,675 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1095 transitions. [2022-11-18 18:46:22,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1095 transitions. [2022-11-18 18:46:22,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:22,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1095 transitions. [2022-11-18 18:46:22,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 109.5) internal successors, (1095), 10 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states 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 18:46:22,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states 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 18:46:22,685 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states 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 18:46:22,685 INFO L175 Difference]: Start difference. First operand has 133 places, 125 transitions, 305 flow. Second operand 10 states and 1095 transitions. [2022-11-18 18:46:22,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 158 transitions, 528 flow [2022-11-18 18:46:22,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:46:22,691 INFO L231 Difference]: Finished difference. Result has 145 places, 126 transitions, 328 flow [2022-11-18 18:46:22,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=145, PETRI_TRANSITIONS=126} [2022-11-18 18:46:22,694 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 17 predicate places. [2022-11-18 18:46:22,694 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 126 transitions, 328 flow [2022-11-18 18:46:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.6) internal successors, (1056), 10 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states 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 18:46:22,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:22,695 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] [2022-11-18 18:46:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:46:22,696 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 18:46:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2068214570, now seen corresponding path program 1 times [2022-11-18 18:46:22,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:22,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660134459] [2022-11-18 18:46:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:23,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660134459] [2022-11-18 18:46:23,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660134459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227466683] [2022-11-18 18:46:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:23,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:23,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:23,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:23,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:46:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:23,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 18:46:23,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:23,689 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 18:46:23,727 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 18:46:23,728 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 18:46:23,782 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-18 18:46:23,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2022-11-18 18:46:24,405 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-18 18:46:24,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 25 [2022-11-18 18:46:24,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:46:25,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:46:25,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:46:25,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:46:25,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 18:46:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:25,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:26,740 WARN L837 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse2 (+ c_~queue~0.offset (* c_~back~0 4)))) (and (forall ((v_ArrVal_124 (Array Int Int)) (v_ArrVal_123 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_123) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_124) c_~queue~0.base))) (or (<= 0 (+ (select .cse0 .cse1) c_~sum~0)) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_124 (Array Int Int)) (v_ArrVal_123 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_123) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_124) c_~queue~0.base))) (or (<= (+ (select .cse3 .cse1) c_~sum~0) 1) (not (= (select .cse3 .cse2) 1))))))) (< c_~front~0 0)) is different from false [2022-11-18 18:46:27,179 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_main_#t~ret9#1.offset|))) (and (forall ((v_ArrVal_122 (Array Int Int)) (v_ArrVal_124 (Array Int Int)) (v_ArrVal_123 (Array Int Int))) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_123) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_124) |c_ULTIMATE.start_main_#t~ret9#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_122 (Array Int Int)) (v_ArrVal_124 (Array Int Int)) (v_ArrVal_123 (Array Int Int))) (let ((.cse3 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_123) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_124) |c_ULTIMATE.start_main_#t~ret9#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (<= c_~n~0 c_~front~0) (< c_~front~0 0)) is different from false [2022-11-18 18:46:28,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:28,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2022-11-18 18:46:28,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:28,245 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 1308 treesize of output 1256 [2022-11-18 18:46:28,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:28,282 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 926 treesize of output 890 [2022-11-18 18:46:28,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:28,318 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 1196 treesize of output 1016 [2022-11-18 18:46:28,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:28,354 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 1004 treesize of output 920 [2022-11-18 18:46:29,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:29,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2022-11-18 18:46:29,688 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-18 18:46:29,689 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 644 treesize of output 616 [2022-11-18 18:46:29,722 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-18 18:46:29,723 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 612 treesize of output 520 [2022-11-18 18:46:29,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:46:29,747 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 348 [2022-11-18 18:46:29,772 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-18 18:46:29,773 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 468 treesize of output 448 [2022-11-18 18:46:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:31,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227466683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:31,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:31,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 26, 24] total 52 [2022-11-18 18:46:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080214430] [2022-11-18 18:46:31,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:31,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 18:46:31,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 18:46:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1885, Unknown=56, NotChecked=194, Total=2652 [2022-11-18 18:46:31,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 142 [2022-11-18 18:46:31,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 126 transitions, 328 flow. Second operand has 52 states, 52 states have (on average 66.01923076923077) internal successors, (3433), 52 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states 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 18:46:31,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:31,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 142 [2022-11-18 18:46:31,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:36,085 INFO L130 PetriNetUnfolder]: 2637/5265 cut-off events. [2022-11-18 18:46:36,087 INFO L131 PetriNetUnfolder]: For 2788/2788 co-relation queries the response was YES. [2022-11-18 18:46:36,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12610 conditions, 5265 events. 2637/5265 cut-off events. For 2788/2788 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39578 event pairs, 281 based on Foata normal form. 106/5096 useless extension candidates. Maximal degree in co-relation 12596. Up to 667 conditions per place. [2022-11-18 18:46:36,134 INFO L137 encePairwiseOnDemand]: 109/142 looper letters, 237 selfloop transitions, 85 changer transitions 16/392 dead transitions. [2022-11-18 18:46:36,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 392 transitions, 1847 flow [2022-11-18 18:46:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 18:46:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-18 18:46:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3357 transitions. [2022-11-18 18:46:36,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4925176056338028 [2022-11-18 18:46:36,148 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3357 transitions. [2022-11-18 18:46:36,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3357 transitions. [2022-11-18 18:46:36,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:36,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3357 transitions. [2022-11-18 18:46:36,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 69.9375) internal successors, (3357), 48 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states 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 18:46:36,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 142.0) internal successors, (6958), 49 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states 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 18:46:36,180 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 142.0) internal successors, (6958), 49 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states 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 18:46:36,180 INFO L175 Difference]: Start difference. First operand has 145 places, 126 transitions, 328 flow. Second operand 48 states and 3357 transitions. [2022-11-18 18:46:36,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 392 transitions, 1847 flow [2022-11-18 18:46:36,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 392 transitions, 1793 flow, removed 19 selfloop flow, removed 7 redundant places. [2022-11-18 18:46:36,197 INFO L231 Difference]: Finished difference. Result has 208 places, 198 transitions, 927 flow [2022-11-18 18:46:36,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=927, PETRI_PLACES=208, PETRI_TRANSITIONS=198} [2022-11-18 18:46:36,198 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 80 predicate places. [2022-11-18 18:46:36,198 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 198 transitions, 927 flow [2022-11-18 18:46:36,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 66.01923076923077) internal successors, (3433), 52 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states 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 18:46:36,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:36,201 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] [2022-11-18 18:46:36,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:36,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:36,408 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 18:46:36,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash -432324208, now seen corresponding path program 2 times [2022-11-18 18:46:36,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:36,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088311169] [2022-11-18 18:46:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:36,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:37,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:37,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088311169] [2022-11-18 18:46:37,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088311169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:37,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78209875] [2022-11-18 18:46:37,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:46:37,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:37,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:37,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:37,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:46:37,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:46:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 18:46:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:38,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:46:39,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:46:39,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:46:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:46:39,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 18:46:39,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 18:46:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:40,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:43,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:43,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-11-18 18:46:43,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:43,040 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 484 treesize of output 464 [2022-11-18 18:46:43,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 266 [2022-11-18 18:46:43,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:43,076 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 404 treesize of output 368 [2022-11-18 18:46:43,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:43,095 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 356 treesize of output 344 [2022-11-18 18:46:43,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:43,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-11-18 18:46:43,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:46:43,672 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-18 18:46:43,673 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 316 treesize of output 288 [2022-11-18 18:46:43,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:46:43,686 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 188 [2022-11-18 18:46:43,701 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-18 18:46:43,702 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 260 treesize of output 216 [2022-11-18 18:46:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:45,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78209875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:45,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:45,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 25] total 60 [2022-11-18 18:46:45,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718014167] [2022-11-18 18:46:45,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 18:46:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 18:46:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3157, Unknown=35, NotChecked=0, Total=3540 [2022-11-18 18:46:45,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2022-11-18 18:46:45,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 198 transitions, 927 flow. Second operand has 60 states, 60 states have (on average 62.88333333333333) internal successors, (3773), 60 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states 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 18:46:45,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:45,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2022-11-18 18:46:45,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:55,087 INFO L130 PetriNetUnfolder]: 5910/11280 cut-off events. [2022-11-18 18:46:55,087 INFO L131 PetriNetUnfolder]: For 50329/50626 co-relation queries the response was YES. [2022-11-18 18:46:55,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39533 conditions, 11280 events. 5910/11280 cut-off events. For 50329/50626 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 91116 event pairs, 459 based on Foata normal form. 350/11354 useless extension candidates. Maximal degree in co-relation 39496. Up to 1252 conditions per place. [2022-11-18 18:46:55,199 INFO L137 encePairwiseOnDemand]: 106/142 looper letters, 512 selfloop transitions, 170 changer transitions 117/850 dead transitions. [2022-11-18 18:46:55,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 850 transitions, 6563 flow [2022-11-18 18:46:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 18:46:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-18 18:46:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4913 transitions. [2022-11-18 18:46:55,214 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4805359937402191 [2022-11-18 18:46:55,214 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4913 transitions. [2022-11-18 18:46:55,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4913 transitions. [2022-11-18 18:46:55,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:55,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4913 transitions. [2022-11-18 18:46:55,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 68.23611111111111) internal successors, (4913), 72 states have internal predecessors, (4913), 0 states have call successors, (0), 0 states 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 18:46:55,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 142.0) internal successors, (10366), 73 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states 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 18:46:55,256 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 142.0) internal successors, (10366), 73 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states 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 18:46:55,256 INFO L175 Difference]: Start difference. First operand has 208 places, 198 transitions, 927 flow. Second operand 72 states and 4913 transitions. [2022-11-18 18:46:55,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 850 transitions, 6563 flow [2022-11-18 18:46:55,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 850 transitions, 6007 flow, removed 187 selfloop flow, removed 20 redundant places. [2022-11-18 18:46:55,434 INFO L231 Difference]: Finished difference. Result has 284 places, 310 transitions, 2260 flow [2022-11-18 18:46:55,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2260, PETRI_PLACES=284, PETRI_TRANSITIONS=310} [2022-11-18 18:46:55,436 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 156 predicate places. [2022-11-18 18:46:55,437 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 310 transitions, 2260 flow [2022-11-18 18:46:55,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 62.88333333333333) internal successors, (3773), 60 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states 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 18:46:55,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:55,439 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:55,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 18:46:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:55,645 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 18:46:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash -700195353, now seen corresponding path program 3 times [2022-11-18 18:46:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:55,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324001493] [2022-11-18 18:46:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:46:55,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:55,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324001493] [2022-11-18 18:46:55,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324001493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:55,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:55,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:55,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081664962] [2022-11-18 18:46:55,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:55,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:55,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:55,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:55,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2022-11-18 18:46:55,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 310 transitions, 2260 flow. Second operand has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 18:46:55,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:55,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2022-11-18 18:46:55,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:57,321 INFO L130 PetriNetUnfolder]: 1574/5264 cut-off events. [2022-11-18 18:46:57,321 INFO L131 PetriNetUnfolder]: For 82407/82817 co-relation queries the response was YES. [2022-11-18 18:46:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23469 conditions, 5264 events. 1574/5264 cut-off events. For 82407/82817 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 48354 event pairs, 156 based on Foata normal form. 123/4979 useless extension candidates. Maximal degree in co-relation 23410. Up to 1204 conditions per place. [2022-11-18 18:46:57,379 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 116 selfloop transitions, 93 changer transitions 0/406 dead transitions. [2022-11-18 18:46:57,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 406 transitions, 3685 flow [2022-11-18 18:46:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:46:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 18:46:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2022-11-18 18:46:57,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9049295774647887 [2022-11-18 18:46:57,382 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2022-11-18 18:46:57,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2022-11-18 18:46:57,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:57,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2022-11-18 18:46:57,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 18:46:57,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 18:46:57,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 18:46:57,386 INFO L175 Difference]: Start difference. First operand has 284 places, 310 transitions, 2260 flow. Second operand 4 states and 514 transitions. [2022-11-18 18:46:57,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 406 transitions, 3685 flow [2022-11-18 18:46:57,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 406 transitions, 3308 flow, removed 124 selfloop flow, removed 37 redundant places. [2022-11-18 18:46:57,592 INFO L231 Difference]: Finished difference. Result has 252 places, 396 transitions, 3426 flow [2022-11-18 18:46:57,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3426, PETRI_PLACES=252, PETRI_TRANSITIONS=396} [2022-11-18 18:46:57,594 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 124 predicate places. [2022-11-18 18:46:57,594 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 396 transitions, 3426 flow [2022-11-18 18:46:57,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 18:46:57,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:57,595 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] [2022-11-18 18:46:57,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:46:57,595 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 18:46:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2025225898, now seen corresponding path program 1 times [2022-11-18 18:46:57,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:57,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488384940] [2022-11-18 18:46:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 18:46:57,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488384940] [2022-11-18 18:46:57,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488384940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:57,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:57,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472209606] [2022-11-18 18:46:57,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:57,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:46:57,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:46:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:46:57,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 142 [2022-11-18 18:46:57,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 396 transitions, 3426 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 18:46:57,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:57,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 142 [2022-11-18 18:46:57,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:59,048 INFO L130 PetriNetUnfolder]: 1800/5577 cut-off events. [2022-11-18 18:46:59,048 INFO L131 PetriNetUnfolder]: For 81398/82004 co-relation queries the response was YES. [2022-11-18 18:46:59,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26252 conditions, 5577 events. 1800/5577 cut-off events. For 81398/82004 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 49746 event pairs, 465 based on Foata normal form. 35/5233 useless extension candidates. Maximal degree in co-relation 26195. Up to 2510 conditions per place. [2022-11-18 18:46:59,113 INFO L137 encePairwiseOnDemand]: 139/142 looper letters, 209 selfloop transitions, 4 changer transitions 0/391 dead transitions. [2022-11-18 18:46:59,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 391 transitions, 3811 flow [2022-11-18 18:46:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:46:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:46:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2022-11-18 18:46:59,115 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.903755868544601 [2022-11-18 18:46:59,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2022-11-18 18:46:59,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2022-11-18 18:46:59,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:59,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2022-11-18 18:46:59,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 18:46:59,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 18:46:59,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 18:46:59,119 INFO L175 Difference]: Start difference. First operand has 252 places, 396 transitions, 3426 flow. Second operand 3 states and 385 transitions. [2022-11-18 18:46:59,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 391 transitions, 3811 flow [2022-11-18 18:46:59,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 391 transitions, 3758 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-11-18 18:46:59,322 INFO L231 Difference]: Finished difference. Result has 251 places, 385 transitions, 3296 flow [2022-11-18 18:46:59,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3296, PETRI_PLACES=251, PETRI_TRANSITIONS=385} [2022-11-18 18:46:59,324 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 123 predicate places. [2022-11-18 18:46:59,324 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 385 transitions, 3296 flow [2022-11-18 18:46:59,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 18:46:59,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:59,325 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 18:46:59,326 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 18:46:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash 846316091, now seen corresponding path program 4 times [2022-11-18 18:46:59,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:59,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196738302] [2022-11-18 18:46:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:59,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:46:59,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:59,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196738302] [2022-11-18 18:46:59,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196738302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:59,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:59,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:59,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922508406] [2022-11-18 18:46:59,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:59,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:59,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:59,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:59,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:59,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 142 [2022-11-18 18:46:59,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 385 transitions, 3296 flow. Second operand has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 18:46:59,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:59,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 142 [2022-11-18 18:46:59,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:01,135 INFO L130 PetriNetUnfolder]: 1684/6647 cut-off events. [2022-11-18 18:47:01,135 INFO L131 PetriNetUnfolder]: For 65331/65855 co-relation queries the response was YES. [2022-11-18 18:47:01,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26511 conditions, 6647 events. 1684/6647 cut-off events. For 65331/65855 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 64654 event pairs, 251 based on Foata normal form. 347/6532 useless extension candidates. Maximal degree in co-relation 26452. Up to 1419 conditions per place. [2022-11-18 18:47:01,369 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 230 selfloop transitions, 6 changer transitions 0/414 dead transitions. [2022-11-18 18:47:01,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 414 transitions, 3975 flow [2022-11-18 18:47:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:47:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 18:47:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 510 transitions. [2022-11-18 18:47:01,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.897887323943662 [2022-11-18 18:47:01,370 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 510 transitions. [2022-11-18 18:47:01,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 510 transitions. [2022-11-18 18:47:01,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:01,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 510 transitions. [2022-11-18 18:47:01,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 18:47:01,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 18:47:01,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 18:47:01,373 INFO L175 Difference]: Start difference. First operand has 251 places, 385 transitions, 3296 flow. Second operand 4 states and 510 transitions. [2022-11-18 18:47:01,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 414 transitions, 3975 flow [2022-11-18 18:47:01,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 414 transitions, 3963 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-18 18:47:01,539 INFO L231 Difference]: Finished difference. Result has 255 places, 367 transitions, 3043 flow [2022-11-18 18:47:01,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2990, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3043, PETRI_PLACES=255, PETRI_TRANSITIONS=367} [2022-11-18 18:47:01,540 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 127 predicate places. [2022-11-18 18:47:01,540 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 367 transitions, 3043 flow [2022-11-18 18:47:01,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 18:47:01,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:01,541 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:01,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:47:01,542 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 18:47:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1530084015, now seen corresponding path program 1 times [2022-11-18 18:47:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:01,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324211440] [2022-11-18 18:47:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:02,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324211440] [2022-11-18 18:47:02,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324211440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:02,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133184967] [2022-11-18 18:47:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:02,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:02,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:02,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:47:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:47:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:02,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:03,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133184967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:03,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:03,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 30 [2022-11-18 18:47:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769365411] [2022-11-18 18:47:03,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:03,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 18:47:03,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:03,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 18:47:03,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-11-18 18:47:03,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 142 [2022-11-18 18:47:03,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 367 transitions, 3043 flow. Second operand has 30 states, 30 states have (on average 105.16666666666667) internal successors, (3155), 30 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states 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 18:47:03,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:03,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 142 [2022-11-18 18:47:03,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:06,364 INFO L130 PetriNetUnfolder]: 1942/6424 cut-off events. [2022-11-18 18:47:06,364 INFO L131 PetriNetUnfolder]: For 66986/67562 co-relation queries the response was YES. [2022-11-18 18:47:06,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26991 conditions, 6424 events. 1942/6424 cut-off events. For 66986/67562 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 58880 event pairs, 372 based on Foata normal form. 365/6404 useless extension candidates. Maximal degree in co-relation 26930. Up to 1946 conditions per place. [2022-11-18 18:47:06,415 INFO L137 encePairwiseOnDemand]: 122/142 looper letters, 136 selfloop transitions, 22 changer transitions 101/395 dead transitions. [2022-11-18 18:47:06,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 395 transitions, 3400 flow [2022-11-18 18:47:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 18:47:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-18 18:47:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3302 transitions. [2022-11-18 18:47:06,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7501135847342117 [2022-11-18 18:47:06,422 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3302 transitions. [2022-11-18 18:47:06,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3302 transitions. [2022-11-18 18:47:06,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:06,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3302 transitions. [2022-11-18 18:47:06,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 106.51612903225806) internal successors, (3302), 31 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states 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 18:47:06,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 142.0) internal successors, (4544), 32 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states 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 18:47:06,440 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 142.0) internal successors, (4544), 32 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states 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 18:47:06,440 INFO L175 Difference]: Start difference. First operand has 255 places, 367 transitions, 3043 flow. Second operand 31 states and 3302 transitions. [2022-11-18 18:47:06,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 395 transitions, 3400 flow [2022-11-18 18:47:06,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 395 transitions, 3210 flow, removed 90 selfloop flow, removed 11 redundant places. [2022-11-18 18:47:06,616 INFO L231 Difference]: Finished difference. Result has 277 places, 275 transitions, 2154 flow [2022-11-18 18:47:06,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2154, PETRI_PLACES=277, PETRI_TRANSITIONS=275} [2022-11-18 18:47:06,618 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 149 predicate places. [2022-11-18 18:47:06,618 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 275 transitions, 2154 flow [2022-11-18 18:47:06,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 105.16666666666667) internal successors, (3155), 30 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states 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 18:47:06,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:06,620 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:06,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:06,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:06,825 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 18:47:06,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:06,826 INFO L85 PathProgramCache]: Analyzing trace with hash 600011501, now seen corresponding path program 2 times [2022-11-18 18:47:06,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:06,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399469653] [2022-11-18 18:47:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:10,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:10,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399469653] [2022-11-18 18:47:10,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399469653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:10,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848584452] [2022-11-18 18:47:10,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:10,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:10,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:10,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:10,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:47:11,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:11,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:11,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-18 18:47:11,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:12,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:12,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:47:13,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:47:13,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:47:13,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:13,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-11-18 18:47:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:14,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:18,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:18,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 99 [2022-11-18 18:47:19,067 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-18 18:47:19,067 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 2306 treesize of output 2208 [2022-11-18 18:47:19,128 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-18 18:47:19,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2170 treesize of output 2000 [2022-11-18 18:47:19,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:47:19,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:19,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 1582 treesize of output 1516 [2022-11-18 18:47:19,247 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-18 18:47:19,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1858 treesize of output 1480 [2022-11-18 18:47:22,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:22,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 99 [2022-11-18 18:47:23,044 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-18 18:47:23,045 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 2306 treesize of output 2178 [2022-11-18 18:47:23,104 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-18 18:47:23,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2170 treesize of output 1970 [2022-11-18 18:47:23,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:23,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:47:23,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:23,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1582 treesize of output 1478 [2022-11-18 18:47:23,192 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-18 18:47:23,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1858 treesize of output 1450 [2022-11-18 18:47:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:25,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848584452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:25,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:25,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 26] total 80 [2022-11-18 18:47:25,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96597073] [2022-11-18 18:47:25,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:25,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-18 18:47:25,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-18 18:47:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=5472, Unknown=82, NotChecked=0, Total=6320 [2022-11-18 18:47:25,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2022-11-18 18:47:25,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 275 transitions, 2154 flow. Second operand has 80 states, 80 states have (on average 61.8625) internal successors, (4949), 80 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states 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 18:47:25,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:25,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2022-11-18 18:47:25,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:58,874 INFO L130 PetriNetUnfolder]: 39589/73652 cut-off events. [2022-11-18 18:48:58,874 INFO L131 PetriNetUnfolder]: For 556173/556173 co-relation queries the response was YES. [2022-11-18 18:48:59,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336785 conditions, 73652 events. 39589/73652 cut-off events. For 556173/556173 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 710363 event pairs, 2859 based on Foata normal form. 2130/75717 useless extension candidates. Maximal degree in co-relation 336719. Up to 9212 conditions per place. [2022-11-18 18:48:59,550 INFO L137 encePairwiseOnDemand]: 102/142 looper letters, 1486 selfloop transitions, 775 changer transitions 1070/3381 dead transitions. [2022-11-18 18:48:59,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 3381 transitions, 35874 flow [2022-11-18 18:48:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-11-18 18:48:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2022-11-18 18:48:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 19925 transitions. [2022-11-18 18:48:59,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4788972744315724 [2022-11-18 18:48:59,582 INFO L72 ComplementDD]: Start complementDD. Operand 293 states and 19925 transitions. [2022-11-18 18:48:59,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 293 states and 19925 transitions. [2022-11-18 18:48:59,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:59,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 293 states and 19925 transitions. [2022-11-18 18:48:59,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 294 states, 293 states have (on average 68.00341296928327) internal successors, (19925), 293 states have internal predecessors, (19925), 0 states have call successors, (0), 0 states 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 18:48:59,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 294 states, 294 states have (on average 142.0) internal successors, (41748), 294 states have internal predecessors, (41748), 0 states have call successors, (0), 0 states 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 18:48:59,691 INFO L81 ComplementDD]: Finished complementDD. Result has 294 states, 294 states have (on average 142.0) internal successors, (41748), 294 states have internal predecessors, (41748), 0 states have call successors, (0), 0 states 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 18:48:59,691 INFO L175 Difference]: Start difference. First operand has 277 places, 275 transitions, 2154 flow. Second operand 293 states and 19925 transitions. [2022-11-18 18:48:59,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 3381 transitions, 35874 flow [2022-11-18 18:49:03,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 3381 transitions, 31941 flow, removed 1884 selfloop flow, removed 33 redundant places. [2022-11-18 18:49:03,407 INFO L231 Difference]: Finished difference. Result has 664 places, 917 transitions, 11703 flow [2022-11-18 18:49:03,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=293, PETRI_FLOW=11703, PETRI_PLACES=664, PETRI_TRANSITIONS=917} [2022-11-18 18:49:03,408 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 536 predicate places. [2022-11-18 18:49:03,409 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 917 transitions, 11703 flow [2022-11-18 18:49:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 61.8625) internal successors, (4949), 80 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states 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 18:49:03,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:03,410 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:03,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:03,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:49:03,616 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 18:49:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash 895521807, now seen corresponding path program 3 times [2022-11-18 18:49:03,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:03,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076794757] [2022-11-18 18:49:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:03,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:49:04,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:04,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076794757] [2022-11-18 18:49:04,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076794757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:04,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775705754] [2022-11-18 18:49:04,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:49:04,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:04,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:04,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:04,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3164e6bc-c019-4607-8b04-7d8875d9fb24/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:49:04,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:49:04,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 18:49:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:05,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:05,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 19 [2022-11-18 18:49:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:49:05,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:05,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:05,741 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 75 treesize of output 76 [2022-11-18 18:49:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:49:06,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775705754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:06,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:06,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 24 [2022-11-18 18:49:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048920757] [2022-11-18 18:49:06,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:49:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:49:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:49:06,474 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 142 [2022-11-18 18:49:06,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 917 transitions, 11703 flow. Second operand has 24 states, 24 states have (on average 91.08333333333333) internal successors, (2186), 24 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states 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 18:49:06,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:06,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 142 [2022-11-18 18:49:06,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand