./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- 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-6b4ec56 [2022-11-20 11:46:29,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:46:29,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:46:29,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:46:29,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:46:29,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:46:29,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:46:29,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:46:29,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:46:29,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:46:29,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:46:29,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:46:29,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:46:29,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:46:29,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:46:29,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:46:29,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:46:29,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:46:29,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:46:29,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:46:29,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:46:29,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:46:29,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:46:29,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:46:29,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:46:29,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:46:29,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:46:29,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:46:29,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:46:29,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:46:29,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:46:29,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:46:29,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:46:29,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:46:29,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:46:29,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:46:29,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:46:29,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:46:29,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:46:29,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:46:29,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:46:29,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 11:46:30,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:46:30,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:46:30,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:46:30,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:46:30,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:46:30,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:46:30,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:46:30,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:46:30,015 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:46:30,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:46:30,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:46:30,017 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:46:30,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:46:30,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:46:30,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:46:30,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:46:30,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:46:30,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:46:30,019 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 11:46:30,019 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:46:30,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:46:30,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:46:30,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:46:30,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:46:30,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:46:30,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:46:30,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:46:30,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:46:30,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:46:30,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:46:30,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:46:30,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:46:30,024 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:46:30,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:46:30,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:46:30,024 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_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-11-20 11:46:30,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:46:30,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:46:30,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:46:30,477 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:46:30,478 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:46:30,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-20 11:46:34,087 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:46:34,359 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:46:34,360 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-20 11:46:34,367 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/data/416e072c4/4ee4f2315442426a970eacc40abbc52c/FLAGec7a2c114 [2022-11-20 11:46:34,384 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/data/416e072c4/4ee4f2315442426a970eacc40abbc52c [2022-11-20 11:46:34,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:46:34,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:46:34,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:46:34,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:46:34,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:46:34,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77873e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34, skipping insertion in model container [2022-11-20 11:46:34,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:46:34,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:46:34,703 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-20 11:46:34,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:46:34,716 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:46:34,743 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-20 11:46:34,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:46:34,765 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:46:34,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34 WrapperNode [2022-11-20 11:46:34,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:46:34,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:46:34,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:46:34,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:46:34,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,810 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-20 11:46:34,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:46:34,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:46:34,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:46:34,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:46:34,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,838 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:46:34,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:46:34,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:46:34,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:46:34,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:46:34,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:34,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:46:34,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:46:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:46:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:46:34,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:46:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:46:34,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:46:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:46:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:46:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:46:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:46:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:46:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:46:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:46:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:46:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:46:34,965 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:46:35,087 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:46:35,090 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:46:35,341 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:46:35,607 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:46:35,608 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 11:46:35,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:46:35 BoogieIcfgContainer [2022-11-20 11:46:35,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:46:35,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:46:35,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:46:35,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:46:35,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:46:34" (1/3) ... [2022-11-20 11:46:35,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962fece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:46:35, skipping insertion in model container [2022-11-20 11:46:35,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (2/3) ... [2022-11-20 11:46:35,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962fece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:46:35, skipping insertion in model container [2022-11-20 11:46:35,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:46:35" (3/3) ... [2022-11-20 11:46:35,632 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-11-20 11:46:35,644 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:46:35,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:46:35,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-20 11:46:35,659 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:46:35,801 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:46:35,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-11-20 11:46:35,987 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-11-20 11:46:35,987 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:46:35,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-20 11:46:35,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 214 flow [2022-11-20 11:46:36,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 79 transitions, 170 flow [2022-11-20 11:46:36,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:46:36,024 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;@5479aad4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:46:36,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-20 11:46:36,040 INFO L130 PetriNetUnfolder]: 2/42 cut-off events. [2022-11-20 11:46:36,041 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:46:36,041 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:36,042 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] [2022-11-20 11:46:36,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1185055160, now seen corresponding path program 1 times [2022-11-20 11:46:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:36,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458762185] [2022-11-20 11:46:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:36,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:36,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458762185] [2022-11-20 11:46:36,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458762185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:36,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:36,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976651824] [2022-11-20 11:46:36,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:36,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:36,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:36,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-20 11:46:36,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:36,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:36,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-20 11:46:36,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:36,760 INFO L130 PetriNetUnfolder]: 28/160 cut-off events. [2022-11-20 11:46:36,761 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-20 11:46:36,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 160 events. 28/160 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 11 based on Foata normal form. 16/137 useless extension candidates. Maximal degree in co-relation 129. Up to 47 conditions per place. [2022-11-20 11:46:36,764 INFO L137 encePairwiseOnDemand]: 88/99 looper letters, 15 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2022-11-20 11:46:36,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 215 flow [2022-11-20 11:46:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:46:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2022-11-20 11:46:36,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9057239057239057 [2022-11-20 11:46:36,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2022-11-20 11:46:36,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2022-11-20 11:46:36,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:36,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2022-11-20 11:46:36,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:36,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 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) [2022-11-20 11:46:36,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 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) [2022-11-20 11:46:36,801 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 170 flow. Second operand 3 states and 269 transitions. [2022-11-20 11:46:36,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 215 flow [2022-11-20 11:46:36,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 201 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:46:36,810 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 172 flow [2022-11-20 11:46:36,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2022-11-20 11:46:36,817 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2022-11-20 11:46:36,817 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 172 flow [2022-11-20 11:46:36,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:36,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:36,818 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] [2022-11-20 11:46:36,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:46:36,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash 671686075, now seen corresponding path program 1 times [2022-11-20 11:46:36,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:36,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166031427] [2022-11-20 11:46:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:36,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:37,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:37,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166031427] [2022-11-20 11:46:37,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166031427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:37,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:37,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:37,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692637224] [2022-11-20 11:46:37,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:37,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:37,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:46:37,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-20 11:46:37,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:37,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-20 11:46:37,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:37,353 INFO L130 PetriNetUnfolder]: 171/416 cut-off events. [2022-11-20 11:46:37,354 INFO L131 PetriNetUnfolder]: For 43/50 co-relation queries the response was YES. [2022-11-20 11:46:37,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 416 events. 171/416 cut-off events. For 43/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2012 event pairs, 26 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 693. Up to 205 conditions per place. [2022-11-20 11:46:37,363 INFO L137 encePairwiseOnDemand]: 93/99 looper letters, 42 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2022-11-20 11:46:37,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 335 flow [2022-11-20 11:46:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:46:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:46:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2022-11-20 11:46:37,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8242424242424242 [2022-11-20 11:46:37,378 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2022-11-20 11:46:37,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2022-11-20 11:46:37,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:37,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2022-11-20 11:46:37,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,389 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,389 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 172 flow. Second operand 5 states and 408 transitions. [2022-11-20 11:46:37,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 335 flow [2022-11-20 11:46:37,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:46:37,392 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 200 flow [2022-11-20 11:46:37,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2022-11-20 11:46:37,394 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2022-11-20 11:46:37,394 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 200 flow [2022-11-20 11:46:37,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:37,395 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:46:37,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:46:37,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832319, now seen corresponding path program 1 times [2022-11-20 11:46:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406271001] [2022-11-20 11:46:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:37,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:37,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406271001] [2022-11-20 11:46:37,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406271001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:37,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320825795] [2022-11-20 11:46:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:37,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:37,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:37,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:46:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:37,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:46:37,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:37,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:37,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320825795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:37,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:37,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 11:46:37,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579337478] [2022-11-20 11:46:37,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:37,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:46:37,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:37,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:46:37,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:46:37,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-20 11:46:37,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:37,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-20 11:46:37,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:38,126 INFO L130 PetriNetUnfolder]: 100/480 cut-off events. [2022-11-20 11:46:38,127 INFO L131 PetriNetUnfolder]: For 82/109 co-relation queries the response was YES. [2022-11-20 11:46:38,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 480 events. 100/480 cut-off events. For 82/109 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2448 event pairs, 5 based on Foata normal form. 6/391 useless extension candidates. Maximal degree in co-relation 649. Up to 101 conditions per place. [2022-11-20 11:46:38,133 INFO L137 encePairwiseOnDemand]: 91/99 looper letters, 31 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2022-11-20 11:46:38,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 411 flow [2022-11-20 11:46:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:46:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:46:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2022-11-20 11:46:38,139 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8932178932178932 [2022-11-20 11:46:38,139 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2022-11-20 11:46:38,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2022-11-20 11:46:38,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:38,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2022-11-20 11:46:38,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,149 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,149 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 200 flow. Second operand 7 states and 619 transitions. [2022-11-20 11:46:38,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 411 flow [2022-11-20 11:46:38,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:46:38,159 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 357 flow [2022-11-20 11:46:38,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2022-11-20 11:46:38,166 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2022-11-20 11:46:38,166 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 357 flow [2022-11-20 11:46:38,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:38,168 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:46:38,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:38,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:38,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:38,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832320, now seen corresponding path program 1 times [2022-11-20 11:46:38,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:38,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573793886] [2022-11-20 11:46:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:38,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:38,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:38,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573793886] [2022-11-20 11:46:38,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573793886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:38,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020837118] [2022-11-20 11:46:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:38,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:38,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:38,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:38,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:46:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:38,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:46:38,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:38,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:38,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020837118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:38,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:46:38,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-20 11:46:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10393346] [2022-11-20 11:46:38,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:38,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:38,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:38,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-20 11:46:38,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:38,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-20 11:46:38,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:38,915 INFO L130 PetriNetUnfolder]: 98/552 cut-off events. [2022-11-20 11:46:38,915 INFO L131 PetriNetUnfolder]: For 926/1209 co-relation queries the response was YES. [2022-11-20 11:46:38,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 552 events. 98/552 cut-off events. For 926/1209 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3106 event pairs, 2 based on Foata normal form. 39/513 useless extension candidates. Maximal degree in co-relation 759. Up to 100 conditions per place. [2022-11-20 11:46:38,923 INFO L137 encePairwiseOnDemand]: 91/99 looper letters, 16 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2022-11-20 11:46:38,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 98 transitions, 461 flow [2022-11-20 11:46:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:46:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:46:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2022-11-20 11:46:38,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2022-11-20 11:46:38,926 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 342 transitions. [2022-11-20 11:46:38,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 342 transitions. [2022-11-20 11:46:38,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:38,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 342 transitions. [2022-11-20 11:46:38,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,931 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,931 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 357 flow. Second operand 4 states and 342 transitions. [2022-11-20 11:46:38,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 98 transitions, 461 flow [2022-11-20 11:46:38,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 447 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-20 11:46:38,940 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 453 flow [2022-11-20 11:46:38,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2022-11-20 11:46:38,941 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2022-11-20 11:46:38,942 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 453 flow [2022-11-20 11:46:38,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:38,943 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] [2022-11-20 11:46:38,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:39,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:39,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1250225610, now seen corresponding path program 1 times [2022-11-20 11:46:39,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:39,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467577764] [2022-11-20 11:46:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:39,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:39,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467577764] [2022-11-20 11:46:39,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467577764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:39,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:39,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:39,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498947317] [2022-11-20 11:46:39,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:39,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:39,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:39,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:39,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:39,333 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 99 [2022-11-20 11:46:39,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:39,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 99 [2022-11-20 11:46:39,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:39,534 INFO L130 PetriNetUnfolder]: 143/729 cut-off events. [2022-11-20 11:46:39,535 INFO L131 PetriNetUnfolder]: For 2120/2643 co-relation queries the response was YES. [2022-11-20 11:46:39,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1831 conditions, 729 events. 143/729 cut-off events. For 2120/2643 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4748 event pairs, 44 based on Foata normal form. 17/592 useless extension candidates. Maximal degree in co-relation 1143. Up to 229 conditions per place. [2022-11-20 11:46:39,544 INFO L137 encePairwiseOnDemand]: 95/99 looper letters, 42 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2022-11-20 11:46:39,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 666 flow [2022-11-20 11:46:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:46:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-20 11:46:39,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8754208754208754 [2022-11-20 11:46:39,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-20 11:46:39,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-20 11:46:39,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:39,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-20 11:46:39,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 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) [2022-11-20 11:46:39,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 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) [2022-11-20 11:46:39,552 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 453 flow. Second operand 3 states and 260 transitions. [2022-11-20 11:46:39,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 666 flow [2022-11-20 11:46:39,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 110 transitions, 605 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-11-20 11:46:39,563 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 479 flow [2022-11-20 11:46:39,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2022-11-20 11:46:39,566 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2022-11-20 11:46:39,566 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 479 flow [2022-11-20 11:46:39,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:39,567 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] [2022-11-20 11:46:39,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:46:39,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:39,569 INFO L85 PathProgramCache]: Analyzing trace with hash 44078018, now seen corresponding path program 1 times [2022-11-20 11:46:39,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:39,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675829507] [2022-11-20 11:46:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:39,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:39,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:39,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675829507] [2022-11-20 11:46:39,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675829507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:39,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287642362] [2022-11-20 11:46:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:39,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:39,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:39,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:39,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:46:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:46:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:39,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:39,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287642362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:39,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:39,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 11:46:39,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228670875] [2022-11-20 11:46:39,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:39,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:46:39,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:46:39,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:46:39,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-20 11:46:39,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 479 flow. Second operand has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:39,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-20 11:46:39,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:40,786 INFO L130 PetriNetUnfolder]: 730/2013 cut-off events. [2022-11-20 11:46:40,786 INFO L131 PetriNetUnfolder]: For 5108/5158 co-relation queries the response was YES. [2022-11-20 11:46:40,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7099 conditions, 2013 events. 730/2013 cut-off events. For 5108/5158 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 14206 event pairs, 31 based on Foata normal form. 104/1737 useless extension candidates. Maximal degree in co-relation 5363. Up to 633 conditions per place. [2022-11-20 11:46:40,813 INFO L137 encePairwiseOnDemand]: 92/99 looper letters, 277 selfloop transitions, 18 changer transitions 0/348 dead transitions. [2022-11-20 11:46:40,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 348 transitions, 3356 flow [2022-11-20 11:46:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:46:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:46:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1430 transitions. [2022-11-20 11:46:40,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8024691358024691 [2022-11-20 11:46:40,822 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1430 transitions. [2022-11-20 11:46:40,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1430 transitions. [2022-11-20 11:46:40,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:40,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1430 transitions. [2022-11-20 11:46:40,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 79.44444444444444) internal successors, (1430), 18 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:40,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 99.0) internal successors, (1881), 19 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:40,838 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 99.0) internal successors, (1881), 19 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:40,838 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 479 flow. Second operand 18 states and 1430 transitions. [2022-11-20 11:46:40,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 348 transitions, 3356 flow [2022-11-20 11:46:40,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 348 transitions, 3333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:46:40,862 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 580 flow [2022-11-20 11:46:40,862 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=580, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2022-11-20 11:46:40,865 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 39 predicate places. [2022-11-20 11:46:40,865 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 580 flow [2022-11-20 11:46:40,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:40,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:40,866 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:46:40,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:41,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:41,073 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1366418868, now seen corresponding path program 1 times [2022-11-20 11:46:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:41,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871208959] [2022-11-20 11:46:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:41,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:41,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:41,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871208959] [2022-11-20 11:46:41,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871208959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:41,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095230857] [2022-11-20 11:46:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:41,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:41,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:41,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:41,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:46:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:41,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:46:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:41,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:41,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095230857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:41,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:46:41,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:46:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259679335] [2022-11-20 11:46:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:41,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:41,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:46:41,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-20 11:46:41,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:41,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-20 11:46:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:41,850 INFO L130 PetriNetUnfolder]: 655/1819 cut-off events. [2022-11-20 11:46:41,851 INFO L131 PetriNetUnfolder]: For 5187/5272 co-relation queries the response was YES. [2022-11-20 11:46:41,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 1819 events. 655/1819 cut-off events. For 5187/5272 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12603 event pairs, 101 based on Foata normal form. 134/1599 useless extension candidates. Maximal degree in co-relation 5717. Up to 641 conditions per place. [2022-11-20 11:46:41,873 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 87 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2022-11-20 11:46:41,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 1130 flow [2022-11-20 11:46:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:46:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:46:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 553 transitions. [2022-11-20 11:46:41,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2022-11-20 11:46:41,876 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 553 transitions. [2022-11-20 11:46:41,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 553 transitions. [2022-11-20 11:46:41,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:41,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 553 transitions. [2022-11-20 11:46:41,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,881 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,882 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 580 flow. Second operand 7 states and 553 transitions. [2022-11-20 11:46:41,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 1130 flow [2022-11-20 11:46:41,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 151 transitions, 1098 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 11:46:41,951 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 543 flow [2022-11-20 11:46:41,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2022-11-20 11:46:41,952 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 35 predicate places. [2022-11-20 11:46:41,952 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 543 flow [2022-11-20 11:46:41,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:41,953 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:46:41,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:42,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:42,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1505486264, now seen corresponding path program 1 times [2022-11-20 11:46:42,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:42,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322851226] [2022-11-20 11:46:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:42,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:42,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322851226] [2022-11-20 11:46:42,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322851226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:42,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521210366] [2022-11-20 11:46:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:42,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:42,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:42,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:42,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:46:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:42,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:46:42,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:42,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:42,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521210366] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:42,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:46:42,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-11-20 11:46:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781030822] [2022-11-20 11:46:42,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:42,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:42,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:46:42,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 99 [2022-11-20 11:46:42,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 543 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:42,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:42,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 99 [2022-11-20 11:46:42,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:42,867 INFO L130 PetriNetUnfolder]: 220/1082 cut-off events. [2022-11-20 11:46:42,868 INFO L131 PetriNetUnfolder]: For 2446/3042 co-relation queries the response was YES. [2022-11-20 11:46:42,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 1082 events. 220/1082 cut-off events. For 2446/3042 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8211 event pairs, 105 based on Foata normal form. 26/858 useless extension candidates. Maximal degree in co-relation 2092. Up to 455 conditions per place. [2022-11-20 11:46:42,878 INFO L137 encePairwiseOnDemand]: 95/99 looper letters, 38 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2022-11-20 11:46:42,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 112 transitions, 640 flow [2022-11-20 11:46:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:46:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:46:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2022-11-20 11:46:42,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8257575757575758 [2022-11-20 11:46:42,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2022-11-20 11:46:42,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2022-11-20 11:46:42,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:42,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2022-11-20 11:46:42,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:42,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:42,885 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:42,885 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 543 flow. Second operand 4 states and 327 transitions. [2022-11-20 11:46:42,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 112 transitions, 640 flow [2022-11-20 11:46:42,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 112 transitions, 626 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:46:42,896 INFO L231 Difference]: Finished difference. Result has 115 places, 106 transitions, 520 flow [2022-11-20 11:46:42,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=115, PETRI_TRANSITIONS=106} [2022-11-20 11:46:42,898 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 34 predicate places. [2022-11-20 11:46:42,898 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 106 transitions, 520 flow [2022-11-20 11:46:42,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:42,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:42,899 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:46:42,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:43,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:43,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash -7855593, now seen corresponding path program 1 times [2022-11-20 11:46:43,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:43,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918219745] [2022-11-20 11:46:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:43,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:43,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:43,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918219745] [2022-11-20 11:46:43,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918219745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:43,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077587258] [2022-11-20 11:46:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:43,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:43,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:43,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:43,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:46:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:46:43,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:43,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:43,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077587258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:43,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:43,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 11:46:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372401529] [2022-11-20 11:46:43,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:43,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:46:43,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:46:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:46:43,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 99 [2022-11-20 11:46:43,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 106 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 70.625) internal successors, (565), 8 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:43,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:43,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 99 [2022-11-20 11:46:43,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:43,994 INFO L130 PetriNetUnfolder]: 250/1331 cut-off events. [2022-11-20 11:46:43,994 INFO L131 PetriNetUnfolder]: For 2631/3024 co-relation queries the response was YES. [2022-11-20 11:46:43,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3133 conditions, 1331 events. 250/1331 cut-off events. For 2631/3024 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10814 event pairs, 64 based on Foata normal form. 75/1144 useless extension candidates. Maximal degree in co-relation 2909. Up to 237 conditions per place. [2022-11-20 11:46:44,007 INFO L137 encePairwiseOnDemand]: 90/99 looper letters, 64 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2022-11-20 11:46:44,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 145 transitions, 879 flow [2022-11-20 11:46:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:46:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:46:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 592 transitions. [2022-11-20 11:46:44,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7474747474747475 [2022-11-20 11:46:44,011 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 592 transitions. [2022-11-20 11:46:44,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 592 transitions. [2022-11-20 11:46:44,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:44,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 592 transitions. [2022-11-20 11:46:44,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 99.0) internal successors, (891), 9 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,017 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 99.0) internal successors, (891), 9 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,017 INFO L175 Difference]: Start difference. First operand has 115 places, 106 transitions, 520 flow. Second operand 8 states and 592 transitions. [2022-11-20 11:46:44,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 145 transitions, 879 flow [2022-11-20 11:46:44,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 145 transitions, 865 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-20 11:46:44,028 INFO L231 Difference]: Finished difference. Result has 121 places, 108 transitions, 582 flow [2022-11-20 11:46:44,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=582, PETRI_PLACES=121, PETRI_TRANSITIONS=108} [2022-11-20 11:46:44,029 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 40 predicate places. [2022-11-20 11:46:44,029 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 108 transitions, 582 flow [2022-11-20 11:46:44,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.625) internal successors, (565), 8 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:44,030 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] [2022-11-20 11:46:44,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:44,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:44,239 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1688134863, now seen corresponding path program 1 times [2022-11-20 11:46:44,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797484772] [2022-11-20 11:46:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:44,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:44,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:44,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797484772] [2022-11-20 11:46:44,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797484772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:44,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:44,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:46:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270439371] [2022-11-20 11:46:44,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:44,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:44,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:44,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2022-11-20 11:46:44,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 108 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:44,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2022-11-20 11:46:44,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:44,973 INFO L130 PetriNetUnfolder]: 701/2301 cut-off events. [2022-11-20 11:46:44,973 INFO L131 PetriNetUnfolder]: For 5053/5077 co-relation queries the response was YES. [2022-11-20 11:46:44,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6573 conditions, 2301 events. 701/2301 cut-off events. For 5053/5077 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 17746 event pairs, 456 based on Foata normal form. 24/2155 useless extension candidates. Maximal degree in co-relation 6240. Up to 1451 conditions per place. [2022-11-20 11:46:44,997 INFO L137 encePairwiseOnDemand]: 93/99 looper letters, 63 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2022-11-20 11:46:44,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 118 transitions, 791 flow [2022-11-20 11:46:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:46:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 377 transitions. [2022-11-20 11:46:45,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6346801346801347 [2022-11-20 11:46:45,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 377 transitions. [2022-11-20 11:46:45,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 377 transitions. [2022-11-20 11:46:45,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:45,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 377 transitions. [2022-11-20 11:46:45,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:45,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:45,005 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:45,005 INFO L175 Difference]: Start difference. First operand has 121 places, 108 transitions, 582 flow. Second operand 6 states and 377 transitions. [2022-11-20 11:46:45,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 118 transitions, 791 flow [2022-11-20 11:46:45,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 775 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-20 11:46:45,025 INFO L231 Difference]: Finished difference. Result has 124 places, 108 transitions, 582 flow [2022-11-20 11:46:45,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=582, PETRI_PLACES=124, PETRI_TRANSITIONS=108} [2022-11-20 11:46:45,027 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2022-11-20 11:46:45,027 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 108 transitions, 582 flow [2022-11-20 11:46:45,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:45,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:45,028 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] [2022-11-20 11:46:45,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:46:45,028 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:45,029 INFO L85 PathProgramCache]: Analyzing trace with hash -825592294, now seen corresponding path program 1 times [2022-11-20 11:46:45,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:45,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574178645] [2022-11-20 11:46:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:45,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:45,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:45,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574178645] [2022-11-20 11:46:45,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574178645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:45,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008451518] [2022-11-20 11:46:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:45,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:45,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:45,335 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:45,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:46:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:45,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:46:45,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:45,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:45,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008451518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:45,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:46:45,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2022-11-20 11:46:45,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675910691] [2022-11-20 11:46:45,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:45,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:46:45,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:46:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:46:45,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2022-11-20 11:46:45,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 108 transitions, 582 flow. Second operand has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:45,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:45,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2022-11-20 11:46:45,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:46,277 INFO L130 PetriNetUnfolder]: 448/1819 cut-off events. [2022-11-20 11:46:46,277 INFO L131 PetriNetUnfolder]: For 3018/3040 co-relation queries the response was YES. [2022-11-20 11:46:46,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4834 conditions, 1819 events. 448/1819 cut-off events. For 3018/3040 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 14721 event pairs, 295 based on Foata normal form. 22/1746 useless extension candidates. Maximal degree in co-relation 4544. Up to 980 conditions per place. [2022-11-20 11:46:46,302 INFO L137 encePairwiseOnDemand]: 92/99 looper letters, 43 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2022-11-20 11:46:46,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 107 transitions, 678 flow [2022-11-20 11:46:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:46:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:46:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 425 transitions. [2022-11-20 11:46:46,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6132756132756133 [2022-11-20 11:46:46,305 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 425 transitions. [2022-11-20 11:46:46,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 425 transitions. [2022-11-20 11:46:46,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:46,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 425 transitions. [2022-11-20 11:46:46,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.714285714285715) internal successors, (425), 7 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,309 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,309 INFO L175 Difference]: Start difference. First operand has 124 places, 108 transitions, 582 flow. Second operand 7 states and 425 transitions. [2022-11-20 11:46:46,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 107 transitions, 678 flow [2022-11-20 11:46:46,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 107 transitions, 668 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:46:46,363 INFO L231 Difference]: Finished difference. Result has 124 places, 107 transitions, 582 flow [2022-11-20 11:46:46,364 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=582, PETRI_PLACES=124, PETRI_TRANSITIONS=107} [2022-11-20 11:46:46,364 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2022-11-20 11:46:46,365 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 107 transitions, 582 flow [2022-11-20 11:46:46,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:46,365 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] [2022-11-20 11:46:46,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:46,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash 176442899, now seen corresponding path program 1 times [2022-11-20 11:46:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:46,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392825712] [2022-11-20 11:46:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:46,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:46,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392825712] [2022-11-20 11:46:46,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392825712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:46,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314587441] [2022-11-20 11:46:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:46,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:46,739 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:46,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:46:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:46,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:46:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:47,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:47,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314587441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:47,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:47,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-20 11:46:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758769211] [2022-11-20 11:46:47,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:47,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:46:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:46:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:46:47,167 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2022-11-20 11:46:47,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 107 transitions, 582 flow. Second operand has 15 states, 15 states have (on average 64.86666666666666) internal successors, (973), 15 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:47,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:47,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2022-11-20 11:46:47,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:48,027 INFO L130 PetriNetUnfolder]: 822/2661 cut-off events. [2022-11-20 11:46:48,027 INFO L131 PetriNetUnfolder]: For 5882/5882 co-relation queries the response was YES. [2022-11-20 11:46:48,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7685 conditions, 2661 events. 822/2661 cut-off events. For 5882/5882 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 21071 event pairs, 183 based on Foata normal form. 37/2682 useless extension candidates. Maximal degree in co-relation 7616. Up to 962 conditions per place. [2022-11-20 11:46:48,048 INFO L137 encePairwiseOnDemand]: 88/99 looper letters, 114 selfloop transitions, 23 changer transitions 17/200 dead transitions. [2022-11-20 11:46:48,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 200 transitions, 1584 flow [2022-11-20 11:46:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:46:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 11:46:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 939 transitions. [2022-11-20 11:46:48,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6774891774891775 [2022-11-20 11:46:48,052 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 939 transitions. [2022-11-20 11:46:48,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 939 transitions. [2022-11-20 11:46:48,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:48,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 939 transitions. [2022-11-20 11:46:48,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 67.07142857142857) internal successors, (939), 14 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,061 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,061 INFO L175 Difference]: Start difference. First operand has 124 places, 107 transitions, 582 flow. Second operand 14 states and 939 transitions. [2022-11-20 11:46:48,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 200 transitions, 1584 flow [2022-11-20 11:46:48,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 1573 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:46:48,081 INFO L231 Difference]: Finished difference. Result has 136 places, 118 transitions, 791 flow [2022-11-20 11:46:48,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=791, PETRI_PLACES=136, PETRI_TRANSITIONS=118} [2022-11-20 11:46:48,083 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 55 predicate places. [2022-11-20 11:46:48,084 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 118 transitions, 791 flow [2022-11-20 11:46:48,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.86666666666666) internal successors, (973), 15 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:48,085 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:48,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:48,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:46:48,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1218228744, now seen corresponding path program 2 times [2022-11-20 11:46:48,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:48,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504426586] [2022-11-20 11:46:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:48,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:48,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:48,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504426586] [2022-11-20 11:46:48,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504426586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:48,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871097176] [2022-11-20 11:46:48,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:48,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:48,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:48,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:48,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:46:48,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:46:48,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:48,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:46:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:48,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:48,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871097176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:48,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:48,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 11:46:48,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378354713] [2022-11-20 11:46:48,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:48,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:46:48,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:46:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:46:48,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-20 11:46:48,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 118 transitions, 791 flow. Second operand has 13 states, 13 states have (on average 81.3076923076923) internal successors, (1057), 13 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:48,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-20 11:46:48,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:49,268 INFO L130 PetriNetUnfolder]: 228/1624 cut-off events. [2022-11-20 11:46:49,268 INFO L131 PetriNetUnfolder]: For 8007/8439 co-relation queries the response was YES. [2022-11-20 11:46:49,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4841 conditions, 1624 events. 228/1624 cut-off events. For 8007/8439 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 11879 event pairs, 11 based on Foata normal form. 285/1885 useless extension candidates. Maximal degree in co-relation 4776. Up to 194 conditions per place. [2022-11-20 11:46:49,284 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 47 selfloop transitions, 78 changer transitions 0/206 dead transitions. [2022-11-20 11:46:49,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 206 transitions, 1993 flow [2022-11-20 11:46:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:46:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 11:46:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1110 transitions. [2022-11-20 11:46:49,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8624708624708625 [2022-11-20 11:46:49,288 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1110 transitions. [2022-11-20 11:46:49,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1110 transitions. [2022-11-20 11:46:49,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:49,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1110 transitions. [2022-11-20 11:46:49,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 85.38461538461539) internal successors, (1110), 13 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:49,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:49,297 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:49,298 INFO L175 Difference]: Start difference. First operand has 136 places, 118 transitions, 791 flow. Second operand 13 states and 1110 transitions. [2022-11-20 11:46:49,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 206 transitions, 1993 flow [2022-11-20 11:46:49,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 206 transitions, 1978 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-11-20 11:46:49,322 INFO L231 Difference]: Finished difference. Result has 150 places, 186 transitions, 2065 flow [2022-11-20 11:46:49,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2065, PETRI_PLACES=150, PETRI_TRANSITIONS=186} [2022-11-20 11:46:49,324 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 69 predicate places. [2022-11-20 11:46:49,324 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 186 transitions, 2065 flow [2022-11-20 11:46:49,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 81.3076923076923) internal successors, (1057), 13 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:49,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:49,325 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:49,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:49,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:46:49,537 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:49,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1808259579, now seen corresponding path program 2 times [2022-11-20 11:46:49,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:49,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507719863] [2022-11-20 11:46:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:49,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:49,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507719863] [2022-11-20 11:46:49,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507719863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287750241] [2022-11-20 11:46:49,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:49,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:49,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:49,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:49,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:46:49,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:49,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:46:49,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 11:46:50,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 11:46:50,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287750241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:50,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:50,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-20 11:46:50,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360135526] [2022-11-20 11:46:50,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:50,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:46:50,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:46:50,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:46:50,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2022-11-20 11:46:50,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 186 transitions, 2065 flow. Second operand has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:50,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:50,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2022-11-20 11:46:50,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:51,504 INFO L130 PetriNetUnfolder]: 1088/3161 cut-off events. [2022-11-20 11:46:51,505 INFO L131 PetriNetUnfolder]: For 40131/40935 co-relation queries the response was YES. [2022-11-20 11:46:51,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15094 conditions, 3161 events. 1088/3161 cut-off events. For 40131/40935 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 22434 event pairs, 19 based on Foata normal form. 435/3591 useless extension candidates. Maximal degree in co-relation 15017. Up to 943 conditions per place. [2022-11-20 11:46:51,553 INFO L137 encePairwiseOnDemand]: 90/99 looper letters, 454 selfloop transitions, 25 changer transitions 6/536 dead transitions. [2022-11-20 11:46:51,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 536 transitions, 8265 flow [2022-11-20 11:46:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:46:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 11:46:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1450 transitions. [2022-11-20 11:46:51,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6657483930211203 [2022-11-20 11:46:51,561 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1450 transitions. [2022-11-20 11:46:51,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1450 transitions. [2022-11-20 11:46:51,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:51,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1450 transitions. [2022-11-20 11:46:51,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.9090909090909) internal successors, (1450), 22 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:51,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:51,580 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:51,580 INFO L175 Difference]: Start difference. First operand has 150 places, 186 transitions, 2065 flow. Second operand 22 states and 1450 transitions. [2022-11-20 11:46:51,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 536 transitions, 8265 flow [2022-11-20 11:46:51,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 536 transitions, 7623 flow, removed 298 selfloop flow, removed 6 redundant places. [2022-11-20 11:46:51,658 INFO L231 Difference]: Finished difference. Result has 165 places, 188 transitions, 1899 flow [2022-11-20 11:46:51,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1899, PETRI_PLACES=165, PETRI_TRANSITIONS=188} [2022-11-20 11:46:51,660 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 84 predicate places. [2022-11-20 11:46:51,660 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 188 transitions, 1899 flow [2022-11-20 11:46:51,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:51,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:51,661 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:51,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:51,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:46:51,868 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1008065624, now seen corresponding path program 3 times [2022-11-20 11:46:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:51,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241696340] [2022-11-20 11:46:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:51,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:52,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:52,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241696340] [2022-11-20 11:46:52,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241696340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:52,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070771049] [2022-11-20 11:46:52,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:52,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:52,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:52,206 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:52,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:46:52,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 11:46:52,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:52,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:46:52,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:52,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:52,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070771049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:52,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:52,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 11:46:52,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746112747] [2022-11-20 11:46:52,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:52,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:46:52,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:52,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:46:52,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:46:52,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-20 11:46:52,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 188 transitions, 1899 flow. Second operand has 25 states, 25 states have (on average 81.16) internal successors, (2029), 25 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:52,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-20 11:46:52,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:54,013 INFO L130 PetriNetUnfolder]: 566/4020 cut-off events. [2022-11-20 11:46:54,013 INFO L131 PetriNetUnfolder]: For 48273/49614 co-relation queries the response was YES. [2022-11-20 11:46:54,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12917 conditions, 4020 events. 566/4020 cut-off events. For 48273/49614 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 32655 event pairs, 11 based on Foata normal form. 903/4887 useless extension candidates. Maximal degree in co-relation 12845. Up to 516 conditions per place. [2022-11-20 11:46:54,057 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 73 selfloop transitions, 284 changer transitions 0/442 dead transitions. [2022-11-20 11:46:54,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 442 transitions, 5442 flow [2022-11-20 11:46:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:46:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 11:46:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2142 transitions. [2022-11-20 11:46:54,063 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8654545454545455 [2022-11-20 11:46:54,063 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2142 transitions. [2022-11-20 11:46:54,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2142 transitions. [2022-11-20 11:46:54,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:54,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2142 transitions. [2022-11-20 11:46:54,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 85.68) internal successors, (2142), 25 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:54,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:54,081 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:54,082 INFO L175 Difference]: Start difference. First operand has 165 places, 188 transitions, 1899 flow. Second operand 25 states and 2142 transitions. [2022-11-20 11:46:54,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 442 transitions, 5442 flow [2022-11-20 11:46:54,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 442 transitions, 5382 flow, removed 3 selfloop flow, removed 15 redundant places. [2022-11-20 11:46:54,237 INFO L231 Difference]: Finished difference. Result has 196 places, 398 transitions, 5843 flow [2022-11-20 11:46:54,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5843, PETRI_PLACES=196, PETRI_TRANSITIONS=398} [2022-11-20 11:46:54,239 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 115 predicate places. [2022-11-20 11:46:54,239 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 398 transitions, 5843 flow [2022-11-20 11:46:54,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.16) internal successors, (2029), 25 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:54,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:54,241 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:54,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:54,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:46:54,447 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:46:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash -883355368, now seen corresponding path program 4 times [2022-11-20 11:46:54,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909374038] [2022-11-20 11:46:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909374038] [2022-11-20 11:46:55,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909374038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527846543] [2022-11-20 11:46:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:46:55,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:55,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:55,274 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:55,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:46:55,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:46:55,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:55,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:46:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:55,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:57,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527846543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:57,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:57,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-20 11:46:57,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78368939] [2022-11-20 11:46:57,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:57,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:46:57,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:57,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:46:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:46:57,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-20 11:46:57,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 398 transitions, 5843 flow. Second operand has 49 states, 49 states have (on average 81.08163265306122) internal successors, (3973), 49 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:57,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:57,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-20 11:46:57,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:01,739 INFO L130 PetriNetUnfolder]: 1423/10047 cut-off events. [2022-11-20 11:47:01,740 INFO L131 PetriNetUnfolder]: For 576294/581213 co-relation queries the response was YES. [2022-11-20 11:47:01,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33683 conditions, 10047 events. 1423/10047 cut-off events. For 576294/581213 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 87875 event pairs, 11 based on Foata normal form. 2927/12914 useless extension candidates. Maximal degree in co-relation 33589. Up to 1574 conditions per place. [2022-11-20 11:47:01,849 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 123 selfloop transitions, 996 changer transitions 0/1204 dead transitions. [2022-11-20 11:47:01,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1204 transitions, 19086 flow [2022-11-20 11:47:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 11:47:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 11:47:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4206 transitions. [2022-11-20 11:47:01,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8670377241805813 [2022-11-20 11:47:01,857 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4206 transitions. [2022-11-20 11:47:01,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4206 transitions. [2022-11-20 11:47:01,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:01,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4206 transitions. [2022-11-20 11:47:01,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 85.83673469387755) internal successors, (4206), 49 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:01,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 99.0) internal successors, (4950), 50 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:01,881 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 99.0) internal successors, (4950), 50 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:01,881 INFO L175 Difference]: Start difference. First operand has 196 places, 398 transitions, 5843 flow. Second operand 49 states and 4206 transitions. [2022-11-20 11:47:01,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1204 transitions, 19086 flow [2022-11-20 11:47:02,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1204 transitions, 16354 flow, removed 1327 selfloop flow, removed 5 redundant places. [2022-11-20 11:47:02,321 INFO L231 Difference]: Finished difference. Result has 285 places, 1112 transitions, 18163 flow [2022-11-20 11:47:02,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18163, PETRI_PLACES=285, PETRI_TRANSITIONS=1112} [2022-11-20 11:47:02,322 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 204 predicate places. [2022-11-20 11:47:02,322 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1112 transitions, 18163 flow [2022-11-20 11:47:02,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 81.08163265306122) internal successors, (3973), 49 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:02,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:02,324 INFO L209 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:02,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:47:02,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:47:02,531 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:47:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1346381160, now seen corresponding path program 5 times [2022-11-20 11:47:02,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:02,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605112578] [2022-11-20 11:47:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:05,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:05,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605112578] [2022-11-20 11:47:05,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605112578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:05,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403303414] [2022-11-20 11:47:05,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:47:05,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:05,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:05,718 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:05,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:47:05,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-20 11:47:05,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:47:06,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 11:47:06,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:06,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:11,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403303414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:11,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:11,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-20 11:47:11,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891226566] [2022-11-20 11:47:11,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:11,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-20 11:47:11,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-20 11:47:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-20 11:47:11,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-20 11:47:11,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1112 transitions, 18163 flow. Second operand has 97 states, 97 states have (on average 81.04123711340206) internal successors, (7861), 97 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:11,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:11,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-20 11:47:11,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:32,403 INFO L130 PetriNetUnfolder]: 4297/29347 cut-off events. [2022-11-20 11:47:32,404 INFO L131 PetriNetUnfolder]: For 5757002/5776144 co-relation queries the response was YES. [2022-11-20 11:47:32,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100456 conditions, 29347 events. 4297/29347 cut-off events. For 5757002/5776144 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 288979 event pairs, 11 based on Foata normal form. 10645/39884 useless extension candidates. Maximal degree in co-relation 100319. Up to 4866 conditions per place. [2022-11-20 11:47:32,984 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 221 selfloop transitions, 3580 changer transitions 0/3886 dead transitions. [2022-11-20 11:47:32,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 3886 transitions, 64550 flow [2022-11-20 11:47:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-20 11:47:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-20 11:47:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8334 transitions. [2022-11-20 11:47:33,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8678537956888472 [2022-11-20 11:47:33,003 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8334 transitions. [2022-11-20 11:47:33,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8334 transitions. [2022-11-20 11:47:33,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:33,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8334 transitions. [2022-11-20 11:47:33,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 85.91752577319588) internal successors, (8334), 97 states have internal predecessors, (8334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:33,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 99.0) internal successors, (9702), 98 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:33,052 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 99.0) internal successors, (9702), 98 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:33,053 INFO L175 Difference]: Start difference. First operand has 285 places, 1112 transitions, 18163 flow. Second operand 97 states and 8334 transitions. [2022-11-20 11:47:33,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 3886 transitions, 64550 flow [2022-11-20 11:47:35,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 3886 transitions, 54779 flow, removed 4687 selfloop flow, removed 11 redundant places. [2022-11-20 11:47:35,843 INFO L231 Difference]: Finished difference. Result has 464 places, 3698 transitions, 61608 flow [2022-11-20 11:47:35,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=16646, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=61608, PETRI_PLACES=464, PETRI_TRANSITIONS=3698} [2022-11-20 11:47:35,844 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 383 predicate places. [2022-11-20 11:47:35,844 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 3698 transitions, 61608 flow [2022-11-20 11:47:35,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 81.04123711340206) internal successors, (7861), 97 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:35,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:35,847 INFO L209 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:35,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 11:47:36,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:47:36,060 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:47:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash 122613144, now seen corresponding path program 6 times [2022-11-20 11:47:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:36,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486234211] [2022-11-20 11:47:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:47,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:47,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486234211] [2022-11-20 11:47:47,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486234211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85210586] [2022-11-20 11:47:47,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:47:47,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:47,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:47,042 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:47,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_841dacd3-4c62-4687-b676-087bb8038913/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:47:47,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-20 11:47:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:47:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 11:47:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:48,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85210586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:02,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:02,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-20 11:48:02,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734028630] [2022-11-20 11:48:02,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:02,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-20 11:48:02,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-20 11:48:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-20 11:48:02,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-20 11:48:02,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 3698 transitions, 61608 flow. Second operand has 193 states, 193 states have (on average 81.02072538860104) internal successors, (15637), 193 states have internal predecessors, (15637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:02,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:02,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-20 11:48:02,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand