./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.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_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/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_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/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_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:50:29,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:50:29,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:50:29,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:50:29,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:50:29,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:50:29,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:50:29,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:50:29,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:50:29,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:50:29,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:50:29,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:50:29,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:50:29,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:50:29,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:50:29,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:50:29,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:50:29,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:50:29,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:50:29,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:50:29,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:50:29,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:50:29,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:50:29,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:50:29,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:50:29,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:50:29,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:50:29,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:50:29,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:50:29,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:50:29,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:50:29,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:50:29,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:50:29,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:50:29,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:50:29,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:50:29,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:50:29,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:50:29,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:50:29,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:50:29,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:50:29,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:50:29,910 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:50:29,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:50:29,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:50:29,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:50:29,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:50:29,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:50:29,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:50:29,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:50:29,923 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:50:29,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:50:29,924 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:50:29,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:50:29,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:50:29,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:50:29,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:50:29,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:50:29,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:50:29,926 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:50:29,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:50:29,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:50:29,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:50:29,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:50:29,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:50:29,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:50:29,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:50:29,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:50:29,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:50:29,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:50:29,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:50:29,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:50:29,930 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:50:29,930 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:50:29,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:50:29,931 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_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-11-18 19:50:30,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:50:30,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:50:30,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:50:30,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:50:30,269 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:50:30,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-18 19:50:30,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/data/1f2dcea1b/6bc5bbf161364ac682265193124e55d0/FLAGdd8a14362 [2022-11-18 19:50:30,916 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:50:30,917 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-18 19:50:30,930 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/data/1f2dcea1b/6bc5bbf161364ac682265193124e55d0/FLAGdd8a14362 [2022-11-18 19:50:31,247 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/data/1f2dcea1b/6bc5bbf161364ac682265193124e55d0 [2022-11-18 19:50:31,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:50:31,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:50:31,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:50:31,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:50:31,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:50:31,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709fdc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31, skipping insertion in model container [2022-11-18 19:50:31,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:50:31,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:50:31,560 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_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-18 19:50:31,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:50:31,581 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:50:31,612 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_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-18 19:50:31,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:50:31,631 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:50:31,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31 WrapperNode [2022-11-18 19:50:31,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:50:31,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:50:31,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:50:31,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:50:31,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,695 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-11-18 19:50:31,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:50:31,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:50:31,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:50:31,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:50:31,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:50:31,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:50:31,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:50:31,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:50:31,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (1/1) ... [2022-11-18 19:50:31,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:50:31,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:31,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:50:31,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:50:31,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:50:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:50:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:50:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 19:50:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 19:50:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:50:31,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:50:31,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:50:31,868 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:50:32,038 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:50:32,041 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:50:32,553 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:50:32,777 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:50:32,777 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-18 19:50:32,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:50:32 BoogieIcfgContainer [2022-11-18 19:50:32,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:50:32,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:50:32,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:50:32,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:50:32,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:50:31" (1/3) ... [2022-11-18 19:50:32,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644fc2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:50:32, skipping insertion in model container [2022-11-18 19:50:32,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:31" (2/3) ... [2022-11-18 19:50:32,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644fc2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:50:32, skipping insertion in model container [2022-11-18 19:50:32,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:50:32" (3/3) ... [2022-11-18 19:50:32,794 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-11-18 19:50:32,805 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:50:32,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:50:32,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:50:32,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:50:32,949 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 19:50:32,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2022-11-18 19:50:33,112 INFO L130 PetriNetUnfolder]: 18/208 cut-off events. [2022-11-18 19:50:33,112 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:50:33,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 110 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2022-11-18 19:50:33,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2022-11-18 19:50:33,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2022-11-18 19:50:33,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:50:33,149 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;@3bd8ab1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:50:33,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 19:50:33,216 INFO L130 PetriNetUnfolder]: 18/196 cut-off events. [2022-11-18 19:50:33,216 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:50:33,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:33,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:33,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash 541264758, now seen corresponding path program 1 times [2022-11-18 19:50:33,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:33,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032813478] [2022-11-18 19:50:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:33,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:33,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:33,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032813478] [2022-11-18 19:50:33,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032813478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:33,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:33,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:50:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73470825] [2022-11-18 19:50:33,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:33,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:50:33,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:50:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:50:33,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2022-11-18 19:50:33,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:33,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:33,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2022-11-18 19:50:33,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:33,915 INFO L130 PetriNetUnfolder]: 71/370 cut-off events. [2022-11-18 19:50:33,915 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-18 19:50:33,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1046 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2022-11-18 19:50:33,921 INFO L137 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2022-11-18 19:50:33,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2022-11-18 19:50:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:50:33,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:50:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2022-11-18 19:50:33,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2022-11-18 19:50:33,955 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2022-11-18 19:50:33,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2022-11-18 19:50:33,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:33,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2022-11-18 19:50:33,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:33,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:33,981 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:33,984 INFO L175 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2022-11-18 19:50:33,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2022-11-18 19:50:33,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 19:50:34,003 INFO L231 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2022-11-18 19:50:34,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2022-11-18 19:50:34,014 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2022-11-18 19:50:34,014 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2022-11-18 19:50:34,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:34,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:34,015 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:34,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:50:34,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1157471343, now seen corresponding path program 1 times [2022-11-18 19:50:34,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:34,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116566254] [2022-11-18 19:50:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:34,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:34,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116566254] [2022-11-18 19:50:34,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116566254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:34,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:34,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:50:34,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167835420] [2022-11-18 19:50:34,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:34,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:50:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:34,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:50:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:50:34,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-11-18 19:50:34,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:34,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:34,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-11-18 19:50:34,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:35,273 INFO L130 PetriNetUnfolder]: 73/448 cut-off events. [2022-11-18 19:50:35,274 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-18 19:50:35,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 448 events. 73/448 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1284 event pairs, 38 based on Foata normal form. 11/424 useless extension candidates. Maximal degree in co-relation 616. Up to 118 conditions per place. [2022-11-18 19:50:35,282 INFO L137 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2022-11-18 19:50:35,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2022-11-18 19:50:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:50:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:50:35,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-11-18 19:50:35,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2022-11-18 19:50:35,289 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-11-18 19:50:35,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-11-18 19:50:35,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:35,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-11-18 19:50:35,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,305 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,305 INFO L175 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2022-11-18 19:50:35,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2022-11-18 19:50:35,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:50:35,315 INFO L231 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2022-11-18 19:50:35,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2022-11-18 19:50:35,318 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-11-18 19:50:35,319 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2022-11-18 19:50:35,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:35,321 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:35,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:50:35,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1233715173, now seen corresponding path program 1 times [2022-11-18 19:50:35,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:35,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936574983] [2022-11-18 19:50:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936574983] [2022-11-18 19:50:35,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936574983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:35,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:35,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:50:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604396078] [2022-11-18 19:50:35,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:50:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:50:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:50:35,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-11-18 19:50:35,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:35,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-11-18 19:50:35,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:35,972 INFO L130 PetriNetUnfolder]: 92/476 cut-off events. [2022-11-18 19:50:35,972 INFO L131 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2022-11-18 19:50:35,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 476 events. 92/476 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1566 event pairs, 50 based on Foata normal form. 15/449 useless extension candidates. Maximal degree in co-relation 772. Up to 115 conditions per place. [2022-11-18 19:50:35,976 INFO L137 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2022-11-18 19:50:35,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2022-11-18 19:50:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:50:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:50:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2022-11-18 19:50:35,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2022-11-18 19:50:35,981 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2022-11-18 19:50:35,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2022-11-18 19:50:35,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:35,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2022-11-18 19:50:35,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,019 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,019 INFO L175 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2022-11-18 19:50:36,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2022-11-18 19:50:36,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:50:36,027 INFO L231 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2022-11-18 19:50:36,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-11-18 19:50:36,033 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-11-18 19:50:36,033 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2022-11-18 19:50:36,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:36,035 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:36,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:50:36,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1170939260, now seen corresponding path program 1 times [2022-11-18 19:50:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:36,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103140173] [2022-11-18 19:50:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:36,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:36,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:36,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103140173] [2022-11-18 19:50:36,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103140173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:36,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:36,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225174088] [2022-11-18 19:50:36,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:36,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:36,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:36,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-11-18 19:50:36,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:36,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-11-18 19:50:36,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:36,704 INFO L130 PetriNetUnfolder]: 82/405 cut-off events. [2022-11-18 19:50:36,704 INFO L131 PetriNetUnfolder]: For 84/88 co-relation queries the response was YES. [2022-11-18 19:50:36,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 405 events. 82/405 cut-off events. For 84/88 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1143 event pairs, 23 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 644. Up to 82 conditions per place. [2022-11-18 19:50:36,709 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 19 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2022-11-18 19:50:36,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 186 transitions, 468 flow [2022-11-18 19:50:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:50:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-11-18 19:50:36,712 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8973143759873617 [2022-11-18 19:50:36,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-11-18 19:50:36,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-11-18 19:50:36,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:36,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-11-18 19:50:36,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 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 19:50:36,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,725 INFO L175 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 3 states and 568 transitions. [2022-11-18 19:50:36,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 186 transitions, 468 flow [2022-11-18 19:50:36,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 186 transitions, 458 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 19:50:36,731 INFO L231 Difference]: Finished difference. Result has 187 places, 181 transitions, 408 flow [2022-11-18 19:50:36,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2022-11-18 19:50:36,739 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -2 predicate places. [2022-11-18 19:50:36,739 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 408 flow [2022-11-18 19:50:36,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:36,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:36,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:50:36,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:36,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1731428024, now seen corresponding path program 2 times [2022-11-18 19:50:36,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:36,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142932044] [2022-11-18 19:50:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:37,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142932044] [2022-11-18 19:50:37,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142932044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:37,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:37,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:37,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729263809] [2022-11-18 19:50:37,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:37,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:37,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:37,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-11-18 19:50:37,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:37,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-11-18 19:50:37,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:37,254 INFO L130 PetriNetUnfolder]: 58/347 cut-off events. [2022-11-18 19:50:37,254 INFO L131 PetriNetUnfolder]: For 88/96 co-relation queries the response was YES. [2022-11-18 19:50:37,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 347 events. 58/347 cut-off events. For 88/96 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 810 event pairs, 9 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 564. Up to 91 conditions per place. [2022-11-18 19:50:37,257 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 17 selfloop transitions, 3 changer transitions 0/185 dead transitions. [2022-11-18 19:50:37,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 185 transitions, 462 flow [2022-11-18 19:50:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:50:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-11-18 19:50:37,260 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8941548183254344 [2022-11-18 19:50:37,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-11-18 19:50:37,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-11-18 19:50:37,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:37,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-11-18 19:50:37,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,266 INFO L175 Difference]: Start difference. First operand has 187 places, 181 transitions, 408 flow. Second operand 3 states and 566 transitions. [2022-11-18 19:50:37,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 185 transitions, 462 flow [2022-11-18 19:50:37,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 185 transitions, 454 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-18 19:50:37,274 INFO L231 Difference]: Finished difference. Result has 188 places, 183 transitions, 423 flow [2022-11-18 19:50:37,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2022-11-18 19:50:37,278 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-11-18 19:50:37,279 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 423 flow [2022-11-18 19:50:37,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:37,280 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:37,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:50:37,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:37,282 INFO L85 PathProgramCache]: Analyzing trace with hash -89286756, now seen corresponding path program 3 times [2022-11-18 19:50:37,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:37,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261843658] [2022-11-18 19:50:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:37,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:38,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:38,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261843658] [2022-11-18 19:50:38,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261843658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:38,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:38,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 19:50:38,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49455919] [2022-11-18 19:50:38,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:38,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:50:38,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:50:38,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:50:38,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 211 [2022-11-18 19:50:38,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 423 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:38,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:38,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 211 [2022-11-18 19:50:38,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:38,960 INFO L130 PetriNetUnfolder]: 426/1115 cut-off events. [2022-11-18 19:50:38,960 INFO L131 PetriNetUnfolder]: For 591/603 co-relation queries the response was YES. [2022-11-18 19:50:38,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2378 conditions, 1115 events. 426/1115 cut-off events. For 591/603 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6142 event pairs, 103 based on Foata normal form. 1/1038 useless extension candidates. Maximal degree in co-relation 2369. Up to 291 conditions per place. [2022-11-18 19:50:38,973 INFO L137 encePairwiseOnDemand]: 196/211 looper letters, 77 selfloop transitions, 13 changer transitions 9/232 dead transitions. [2022-11-18 19:50:38,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 782 flow [2022-11-18 19:50:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:50:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 19:50:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1969 transitions. [2022-11-18 19:50:38,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7178271965001822 [2022-11-18 19:50:38,980 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1969 transitions. [2022-11-18 19:50:38,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1969 transitions. [2022-11-18 19:50:38,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:38,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1969 transitions. [2022-11-18 19:50:38,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 151.46153846153845) internal successors, (1969), 13 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:38,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:38,999 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:38,999 INFO L175 Difference]: Start difference. First operand has 188 places, 183 transitions, 423 flow. Second operand 13 states and 1969 transitions. [2022-11-18 19:50:39,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 782 flow [2022-11-18 19:50:39,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 232 transitions, 775 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 19:50:39,010 INFO L231 Difference]: Finished difference. Result has 204 places, 189 transitions, 478 flow [2022-11-18 19:50:39,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=478, PETRI_PLACES=204, PETRI_TRANSITIONS=189} [2022-11-18 19:50:39,014 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 15 predicate places. [2022-11-18 19:50:39,015 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 189 transitions, 478 flow [2022-11-18 19:50:39,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:39,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:39,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:39,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:50:39,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1742407762, now seen corresponding path program 1 times [2022-11-18 19:50:39,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:39,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619500800] [2022-11-18 19:50:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:39,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:39,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619500800] [2022-11-18 19:50:39,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619500800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:39,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:39,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:50:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50182413] [2022-11-18 19:50:39,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:39,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:50:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:50:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:50:39,352 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-11-18 19:50:39,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 189 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:39,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:39,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-11-18 19:50:39,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:39,628 INFO L130 PetriNetUnfolder]: 191/844 cut-off events. [2022-11-18 19:50:39,629 INFO L131 PetriNetUnfolder]: For 519/559 co-relation queries the response was YES. [2022-11-18 19:50:39,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 844 events. 191/844 cut-off events. For 519/559 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4631 event pairs, 41 based on Foata normal form. 20/822 useless extension candidates. Maximal degree in co-relation 1696. Up to 132 conditions per place. [2022-11-18 19:50:39,638 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 31 selfloop transitions, 6 changer transitions 0/207 dead transitions. [2022-11-18 19:50:39,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 207 transitions, 633 flow [2022-11-18 19:50:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:50:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:50:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2022-11-18 19:50:39,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9016587677725119 [2022-11-18 19:50:39,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2022-11-18 19:50:39,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2022-11-18 19:50:39,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:39,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2022-11-18 19:50:39,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:39,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:39,648 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:39,648 INFO L175 Difference]: Start difference. First operand has 204 places, 189 transitions, 478 flow. Second operand 4 states and 761 transitions. [2022-11-18 19:50:39,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 207 transitions, 633 flow [2022-11-18 19:50:39,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 207 transitions, 617 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-18 19:50:39,655 INFO L231 Difference]: Finished difference. Result has 199 places, 193 transitions, 515 flow [2022-11-18 19:50:39,656 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=515, PETRI_PLACES=199, PETRI_TRANSITIONS=193} [2022-11-18 19:50:39,657 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 10 predicate places. [2022-11-18 19:50:39,657 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 193 transitions, 515 flow [2022-11-18 19:50:39,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:39,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:39,658 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:39,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:50:39,659 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1460393981, now seen corresponding path program 1 times [2022-11-18 19:50:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:39,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324199305] [2022-11-18 19:50:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:39,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:40,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324199305] [2022-11-18 19:50:40,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324199305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189716227] [2022-11-18 19:50:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:40,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:40,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:40,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:40,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:50:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:50:40,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:40,733 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 19:50:40,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:41,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189716227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:41,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:41,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-18 19:50:41,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285311343] [2022-11-18 19:50:41,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:41,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:50:41,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:41,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:50:41,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:50:41,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-11-18 19:50:41,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 193 transitions, 515 flow. Second operand has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:41,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:41,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-11-18 19:50:41,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:42,184 INFO L130 PetriNetUnfolder]: 288/1435 cut-off events. [2022-11-18 19:50:42,184 INFO L131 PetriNetUnfolder]: For 1656/1756 co-relation queries the response was YES. [2022-11-18 19:50:42,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 1435 events. 288/1435 cut-off events. For 1656/1756 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9702 event pairs, 149 based on Foata normal form. 64/1434 useless extension candidates. Maximal degree in co-relation 3176. Up to 323 conditions per place. [2022-11-18 19:50:42,199 INFO L137 encePairwiseOnDemand]: 195/211 looper letters, 69 selfloop transitions, 23 changer transitions 1/235 dead transitions. [2022-11-18 19:50:42,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 235 transitions, 868 flow [2022-11-18 19:50:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 19:50:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 19:50:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2731 transitions. [2022-11-18 19:50:42,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7613604683579593 [2022-11-18 19:50:42,207 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2731 transitions. [2022-11-18 19:50:42,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2731 transitions. [2022-11-18 19:50:42,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:42,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2731 transitions. [2022-11-18 19:50:42,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 160.64705882352942) internal successors, (2731), 17 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:42,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:42,227 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:42,228 INFO L175 Difference]: Start difference. First operand has 199 places, 193 transitions, 515 flow. Second operand 17 states and 2731 transitions. [2022-11-18 19:50:42,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 235 transitions, 868 flow [2022-11-18 19:50:42,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 235 transitions, 856 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-18 19:50:42,237 INFO L231 Difference]: Finished difference. Result has 221 places, 204 transitions, 622 flow [2022-11-18 19:50:42,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=622, PETRI_PLACES=221, PETRI_TRANSITIONS=204} [2022-11-18 19:50:42,238 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 32 predicate places. [2022-11-18 19:50:42,239 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 204 transitions, 622 flow [2022-11-18 19:50:42,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:42,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:42,241 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:42,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:42,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:42,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash 938924545, now seen corresponding path program 1 times [2022-11-18 19:50:42,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:42,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425702708] [2022-11-18 19:50:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:42,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:50:42,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425702708] [2022-11-18 19:50:42,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425702708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615771781] [2022-11-18 19:50:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:42,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:42,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:42,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:42,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:50:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:50:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:50:43,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:50:43,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615771781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:43,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:43,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-18 19:50:43,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983709672] [2022-11-18 19:50:43,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:43,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:50:43,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:43,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:50:43,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:50:43,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-11-18 19:50:43,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 204 transitions, 622 flow. Second operand has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:43,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:43,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-11-18 19:50:43,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:44,815 INFO L130 PetriNetUnfolder]: 329/1728 cut-off events. [2022-11-18 19:50:44,816 INFO L131 PetriNetUnfolder]: For 1761/1846 co-relation queries the response was YES. [2022-11-18 19:50:44,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3810 conditions, 1728 events. 329/1728 cut-off events. For 1761/1846 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12432 event pairs, 183 based on Foata normal form. 37/1680 useless extension candidates. Maximal degree in co-relation 3789. Up to 439 conditions per place. [2022-11-18 19:50:44,836 INFO L137 encePairwiseOnDemand]: 197/211 looper letters, 67 selfloop transitions, 24 changer transitions 2/235 dead transitions. [2022-11-18 19:50:44,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 235 transitions, 957 flow [2022-11-18 19:50:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:50:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 19:50:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2252 transitions. [2022-11-18 19:50:44,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7623561272850372 [2022-11-18 19:50:44,844 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2252 transitions. [2022-11-18 19:50:44,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2252 transitions. [2022-11-18 19:50:44,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:44,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2252 transitions. [2022-11-18 19:50:44,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 160.85714285714286) internal successors, (2252), 14 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:44,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:44,861 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:44,861 INFO L175 Difference]: Start difference. First operand has 221 places, 204 transitions, 622 flow. Second operand 14 states and 2252 transitions. [2022-11-18 19:50:44,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 235 transitions, 957 flow [2022-11-18 19:50:44,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 235 transitions, 931 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-18 19:50:44,872 INFO L231 Difference]: Finished difference. Result has 236 places, 212 transitions, 727 flow [2022-11-18 19:50:44,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=727, PETRI_PLACES=236, PETRI_TRANSITIONS=212} [2022-11-18 19:50:44,874 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 47 predicate places. [2022-11-18 19:50:44,874 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 212 transitions, 727 flow [2022-11-18 19:50:44,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:44,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:44,877 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:44,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:45,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:45,085 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:50:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -772543185, now seen corresponding path program 2 times [2022-11-18 19:50:45,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:45,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172781456] [2022-11-18 19:50:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:45,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:47,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:47,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172781456] [2022-11-18 19:50:47,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172781456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:47,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286737806] [2022-11-18 19:50:47,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:50:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:47,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:47,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:50:47,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:50:47,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:50:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 19:50:47,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:49,049 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 19:50:49,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 19:50:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:49,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:49,444 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 19:50:49,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-18 19:50:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:51,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286737806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:51,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:51,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 42 [2022-11-18 19:50:51,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931678980] [2022-11-18 19:50:51,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:51,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 19:50:51,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:51,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 19:50:51,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 19:50:51,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 211 [2022-11-18 19:50:51,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 212 transitions, 727 flow. Second operand has 42 states, 42 states have (on average 132.5) internal successors, (5565), 42 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:51,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:51,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 211 [2022-11-18 19:50:51,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:51:00,753 INFO L130 PetriNetUnfolder]: 5512/15058 cut-off events. [2022-11-18 19:51:00,754 INFO L131 PetriNetUnfolder]: For 19409/20205 co-relation queries the response was YES. [2022-11-18 19:51:00,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37155 conditions, 15058 events. 5512/15058 cut-off events. For 19409/20205 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 156710 event pairs, 1288 based on Foata normal form. 94/14540 useless extension candidates. Maximal degree in co-relation 37128. Up to 2605 conditions per place. [2022-11-18 19:51:01,087 INFO L137 encePairwiseOnDemand]: 178/211 looper letters, 270 selfloop transitions, 99 changer transitions 3/486 dead transitions. [2022-11-18 19:51:01,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 486 transitions, 2698 flow [2022-11-18 19:51:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 19:51:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-18 19:51:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 6462 transitions. [2022-11-18 19:51:01,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6380331753554502 [2022-11-18 19:51:01,108 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 6462 transitions. [2022-11-18 19:51:01,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 6462 transitions. [2022-11-18 19:51:01,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:51:01,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 6462 transitions. [2022-11-18 19:51:01,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 134.625) internal successors, (6462), 48 states have internal predecessors, (6462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:01,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 211.0) internal successors, (10339), 49 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:01,157 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 211.0) internal successors, (10339), 49 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:01,157 INFO L175 Difference]: Start difference. First operand has 236 places, 212 transitions, 727 flow. Second operand 48 states and 6462 transitions. [2022-11-18 19:51:01,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 486 transitions, 2698 flow [2022-11-18 19:51:01,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 486 transitions, 2647 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-11-18 19:51:01,188 INFO L231 Difference]: Finished difference. Result has 295 places, 291 transitions, 1504 flow [2022-11-18 19:51:01,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1504, PETRI_PLACES=295, PETRI_TRANSITIONS=291} [2022-11-18 19:51:01,191 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 106 predicate places. [2022-11-18 19:51:01,191 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 291 transitions, 1504 flow [2022-11-18 19:51:01,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 132.5) internal successors, (5565), 42 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:01,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:51:01,196 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:01,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 19:51:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:51:01,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:51:01,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2012600319, now seen corresponding path program 3 times [2022-11-18 19:51:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:01,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568057764] [2022-11-18 19:51:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:03,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:03,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568057764] [2022-11-18 19:51:03,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568057764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:03,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992598789] [2022-11-18 19:51:03,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:51:03,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:03,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:03,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:03,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:51:03,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:51:03,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:51:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 19:51:03,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:04,323 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 19:51:04,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 19:51:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 19:51:04,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:51:04,423 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 19:51:04,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-18 19:51:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 19:51:04,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992598789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:51:04,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:51:04,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 22 [2022-11-18 19:51:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953830895] [2022-11-18 19:51:04,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:51:04,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 19:51:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 19:51:04,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:51:04,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 211 [2022-11-18 19:51:04,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 291 transitions, 1504 flow. Second operand has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:04,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:51:04,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 211 [2022-11-18 19:51:04,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:51:12,224 INFO L130 PetriNetUnfolder]: 6633/17350 cut-off events. [2022-11-18 19:51:12,224 INFO L131 PetriNetUnfolder]: For 99587/101298 co-relation queries the response was YES. [2022-11-18 19:51:12,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67829 conditions, 17350 events. 6633/17350 cut-off events. For 99587/101298 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 183470 event pairs, 2387 based on Foata normal form. 210/17189 useless extension candidates. Maximal degree in co-relation 67785. Up to 7218 conditions per place. [2022-11-18 19:51:12,475 INFO L137 encePairwiseOnDemand]: 183/211 looper letters, 208 selfloop transitions, 80 changer transitions 0/402 dead transitions. [2022-11-18 19:51:12,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 402 transitions, 2873 flow [2022-11-18 19:51:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 19:51:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-18 19:51:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4791 transitions. [2022-11-18 19:51:12,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6307266982622433 [2022-11-18 19:51:12,488 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4791 transitions. [2022-11-18 19:51:12,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4791 transitions. [2022-11-18 19:51:12,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:51:12,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4791 transitions. [2022-11-18 19:51:12,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 133.08333333333334) internal successors, (4791), 36 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:12,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 211.0) internal successors, (7807), 37 states have internal predecessors, (7807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:12,522 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 211.0) internal successors, (7807), 37 states have internal predecessors, (7807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:12,522 INFO L175 Difference]: Start difference. First operand has 295 places, 291 transitions, 1504 flow. Second operand 36 states and 4791 transitions. [2022-11-18 19:51:12,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 402 transitions, 2873 flow [2022-11-18 19:51:12,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 402 transitions, 2726 flow, removed 57 selfloop flow, removed 13 redundant places. [2022-11-18 19:51:12,709 INFO L231 Difference]: Finished difference. Result has 322 places, 319 transitions, 1860 flow [2022-11-18 19:51:12,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1860, PETRI_PLACES=322, PETRI_TRANSITIONS=319} [2022-11-18 19:51:12,710 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 133 predicate places. [2022-11-18 19:51:12,711 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 319 transitions, 1860 flow [2022-11-18 19:51:12,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:12,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:51:12,713 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:12,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:12,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:51:12,922 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:51:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1366218993, now seen corresponding path program 4 times [2022-11-18 19:51:12,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:12,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899285480] [2022-11-18 19:51:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:12,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:15,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:15,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899285480] [2022-11-18 19:51:15,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899285480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:15,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433256917] [2022-11-18 19:51:15,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:51:15,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:15,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:15,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:15,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:51:15,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:51:15,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:51:15,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 19:51:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:17,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 19:51:18,107 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-11-18 19:51:18,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-11-18 19:51:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:18,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:51:18,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:18,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-18 19:51:18,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-18 19:51:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:21,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433256917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:51:21,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:51:21,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 54 [2022-11-18 19:51:21,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240751514] [2022-11-18 19:51:21,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:51:21,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-18 19:51:21,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-18 19:51:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2605, Unknown=1, NotChecked=0, Total=2862 [2022-11-18 19:51:21,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 211 [2022-11-18 19:51:21,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 319 transitions, 1860 flow. Second operand has 54 states, 54 states have (on average 125.37037037037037) internal successors, (6770), 54 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:21,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:51:21,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 211 [2022-11-18 19:51:21,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:51:49,319 INFO L130 PetriNetUnfolder]: 20524/54383 cut-off events. [2022-11-18 19:51:49,319 INFO L131 PetriNetUnfolder]: For 386418/394147 co-relation queries the response was YES. [2022-11-18 19:51:49,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224643 conditions, 54383 events. 20524/54383 cut-off events. For 386418/394147 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 683976 event pairs, 3220 based on Foata normal form. 1951/55466 useless extension candidates. Maximal degree in co-relation 224594. Up to 10127 conditions per place. [2022-11-18 19:51:50,132 INFO L137 encePairwiseOnDemand]: 167/211 looper letters, 542 selfloop transitions, 339 changer transitions 11/1002 dead transitions. [2022-11-18 19:51:50,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1002 transitions, 10475 flow [2022-11-18 19:51:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-18 19:51:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-11-18 19:51:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 11724 transitions. [2022-11-18 19:51:50,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.603956315681022 [2022-11-18 19:51:50,161 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 11724 transitions. [2022-11-18 19:51:50,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 11724 transitions. [2022-11-18 19:51:50,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:51:50,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 11724 transitions. [2022-11-18 19:51:50,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 127.43478260869566) internal successors, (11724), 92 states have internal predecessors, (11724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:50,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 211.0) internal successors, (19623), 93 states have internal predecessors, (19623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:50,232 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 211.0) internal successors, (19623), 93 states have internal predecessors, (19623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:50,232 INFO L175 Difference]: Start difference. First operand has 322 places, 319 transitions, 1860 flow. Second operand 92 states and 11724 transitions. [2022-11-18 19:51:50,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1002 transitions, 10475 flow [2022-11-18 19:51:51,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1002 transitions, 10386 flow, removed 8 selfloop flow, removed 29 redundant places. [2022-11-18 19:51:51,079 INFO L231 Difference]: Finished difference. Result has 421 places, 600 transitions, 6318 flow [2022-11-18 19:51:51,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=6318, PETRI_PLACES=421, PETRI_TRANSITIONS=600} [2022-11-18 19:51:51,080 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 232 predicate places. [2022-11-18 19:51:51,080 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 600 transitions, 6318 flow [2022-11-18 19:51:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 125.37037037037037) internal successors, (6770), 54 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:51,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:51:51,083 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:51,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:51,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:51,290 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:51:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash 733619099, now seen corresponding path program 5 times [2022-11-18 19:51:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:51,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527479718] [2022-11-18 19:51:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:51,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:53,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:53,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527479718] [2022-11-18 19:51:53,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527479718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:53,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954052020] [2022-11-18 19:51:53,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:51:53,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:53,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:53,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:53,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1580ef6-1c14-4bc7-95a8-d287e0f500ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:51:53,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 19:51:53,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:51:53,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-18 19:51:53,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:53,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:51:54,184 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:51:54,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:51:55,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:55,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:51:55,786 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 19:51:55,885 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 19:51:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:56,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:51:56,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:56,617 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 167 treesize of output 155 [2022-11-18 19:51:56,625 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 138 treesize of output 126 [2022-11-18 19:51:56,634 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 126 treesize of output 102 [2022-11-18 19:52:00,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:52:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:52:00,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954052020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:52:00,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:52:00,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 62 [2022-11-18 19:52:00,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565039061] [2022-11-18 19:52:00,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:00,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 19:52:00,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 19:52:00,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3400, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 19:52:00,487 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 211 [2022-11-18 19:52:00,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 600 transitions, 6318 flow. Second operand has 62 states, 62 states have (on average 119.30645161290323) internal successors, (7397), 62 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:00,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:00,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 211 [2022-11-18 19:52:00,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand