./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro --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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:53:38,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:53:38,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:53:38,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:53:38,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:53:38,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:53:38,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:53:38,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:53:38,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:53:38,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:53:38,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:53:38,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:53:38,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:53:38,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:53:38,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:53:38,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:53:38,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:53:38,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:53:38,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:53:38,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:53:38,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:53:38,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:53:38,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:53:38,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:53:38,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:53:38,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:53:38,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:53:38,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:53:38,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:53:38,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:53:38,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:53:38,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:53:38,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:53:38,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:53:38,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:53:38,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:53:38,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:53:38,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:53:38,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:53:38,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:53:38,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:53:38,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 19:53:38,818 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:53:38,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:53:38,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:53:38,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:53:38,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:53:38,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:53:38,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:53:38,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:53:38,821 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:53:38,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:53:38,822 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:53:38,822 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:53:38,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:53:38,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:53:38,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:53:38,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:53:38,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:53:38,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:53:38,823 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 19:53:38,823 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:53:38,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:53:38,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:53:38,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:53:38,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:53:38,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:53:38,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:53:38,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:53:38,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:53:38,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:53:38,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:53:38,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:53:38,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:53:38,826 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:53:38,826 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:53:38,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:53:38,826 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_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2022-11-18 19:53:39,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:53:39,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:53:39,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:53:39,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:53:39,118 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:53:39,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-18 19:53:39,210 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/data/2d4de0dea/e7dcfb3334d74655bf193a9d6492d35a/FLAG24ed6e354 [2022-11-18 19:53:39,776 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:53:39,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-18 19:53:39,791 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/data/2d4de0dea/e7dcfb3334d74655bf193a9d6492d35a/FLAG24ed6e354 [2022-11-18 19:53:40,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/data/2d4de0dea/e7dcfb3334d74655bf193a9d6492d35a [2022-11-18 19:53:40,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:53:40,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:53:40,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:53:40,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:53:40,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:53:40,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a246456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40, skipping insertion in model container [2022-11-18 19:53:40,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:53:40,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:53:40,409 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-18 19:53:40,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:53:40,429 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:53:40,451 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-18 19:53:40,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:53:40,466 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:53:40,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40 WrapperNode [2022-11-18 19:53:40,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:53:40,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:53:40,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:53:40,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:53:40,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,516 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 166 [2022-11-18 19:53:40,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:53:40,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:53:40,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:53:40,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:53:40,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:53:40,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:53:40,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:53:40,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:53:40,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (1/1) ... [2022-11-18 19:53:40,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:53:40,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:40,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:53:40,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:53:40,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:53:40,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:53:40,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:53:40,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:53:40,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:53:40,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:53:40,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:53:40,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:53:40,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:53:40,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:53:40,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:53:40,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:53:40,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:53:40,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:53:40,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:53:40,633 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:53:40,775 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:53:40,779 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:53:41,147 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:53:41,358 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:53:41,358 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 19:53:41,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:53:41 BoogieIcfgContainer [2022-11-18 19:53:41,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:53:41,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:53:41,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:53:41,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:53:41,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:53:40" (1/3) ... [2022-11-18 19:53:41,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58486cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:53:41, skipping insertion in model container [2022-11-18 19:53:41,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:40" (2/3) ... [2022-11-18 19:53:41,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58486cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:53:41, skipping insertion in model container [2022-11-18 19:53:41,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:53:41" (3/3) ... [2022-11-18 19:53:41,371 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-11-18 19:53:41,390 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:53:41,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:53:41,400 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-18 19:53:41,400 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:53:41,520 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:53:41,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 153 transitions, 322 flow [2022-11-18 19:53:41,654 INFO L130 PetriNetUnfolder]: 11/151 cut-off events. [2022-11-18 19:53:41,655 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:53:41,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 151 events. 11/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2022-11-18 19:53:41,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 153 transitions, 322 flow [2022-11-18 19:53:41,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 132 transitions, 273 flow [2022-11-18 19:53:41,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:53:41,685 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;@59ff0628, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:53:41,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-11-18 19:53:41,703 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-18 19:53:41,704 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:53:41,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:41,705 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] [2022-11-18 19:53:41,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash 13030154, now seen corresponding path program 1 times [2022-11-18 19:53:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:41,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144805048] [2022-11-18 19:53:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:41,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:42,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:42,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144805048] [2022-11-18 19:53:42,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144805048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:42,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:42,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:53:42,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138243908] [2022-11-18 19:53:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:42,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:53:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:42,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:53:42,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:53:42,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 153 [2022-11-18 19:53:42,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 132 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:42,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:42,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 153 [2022-11-18 19:53:42,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:42,526 INFO L130 PetriNetUnfolder]: 57/343 cut-off events. [2022-11-18 19:53:42,527 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 19:53:42,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 343 events. 57/343 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1241 event pairs, 28 based on Foata normal form. 30/287 useless extension candidates. Maximal degree in co-relation 183. Up to 62 conditions per place. [2022-11-18 19:53:42,537 INFO L137 encePairwiseOnDemand]: 137/153 looper letters, 34 selfloop transitions, 4 changer transitions 3/139 dead transitions. [2022-11-18 19:53:42,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 139 transitions, 372 flow [2022-11-18 19:53:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:53:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:53:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 653 transitions. [2022-11-18 19:53:42,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.85359477124183 [2022-11-18 19:53:42,562 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 653 transitions. [2022-11-18 19:53:42,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 653 transitions. [2022-11-18 19:53:42,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:42,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 653 transitions. [2022-11-18 19:53:42,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:42,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:42,587 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:42,589 INFO L175 Difference]: Start difference. First operand has 129 places, 132 transitions, 273 flow. Second operand 5 states and 653 transitions. [2022-11-18 19:53:42,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 139 transitions, 372 flow [2022-11-18 19:53:42,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 139 transitions, 362 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 19:53:42,600 INFO L231 Difference]: Finished difference. Result has 130 places, 122 transitions, 272 flow [2022-11-18 19:53:42,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=130, PETRI_TRANSITIONS=122} [2022-11-18 19:53:42,607 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 1 predicate places. [2022-11-18 19:53:42,608 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 122 transitions, 272 flow [2022-11-18 19:53:42,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:42,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:42,609 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:42,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:53:42,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash 490861190, now seen corresponding path program 1 times [2022-11-18 19:53:42,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721960344] [2022-11-18 19:53:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:42,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721960344] [2022-11-18 19:53:42,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721960344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739493079] [2022-11-18 19:53:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:42,884 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:42,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:53:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:43,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:53:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:43,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:43,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739493079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:43,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:53:43,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 19:53:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743451504] [2022-11-18 19:53:43,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:43,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:53:43,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:53:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:53:43,176 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 153 [2022-11-18 19:53:43,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 122 transitions, 272 flow. Second operand has 12 states, 12 states have (on average 121.66666666666667) internal successors, (1460), 12 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:43,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:43,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 153 [2022-11-18 19:53:43,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:43,655 INFO L130 PetriNetUnfolder]: 141/770 cut-off events. [2022-11-18 19:53:43,656 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-18 19:53:43,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 770 events. 141/770 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3921 event pairs, 70 based on Foata normal form. 3/573 useless extension candidates. Maximal degree in co-relation 868. Up to 57 conditions per place. [2022-11-18 19:53:43,663 INFO L137 encePairwiseOnDemand]: 146/153 looper letters, 73 selfloop transitions, 18 changer transitions 0/189 dead transitions. [2022-11-18 19:53:43,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 626 flow [2022-11-18 19:53:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:53:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 19:53:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2236 transitions. [2022-11-18 19:53:43,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8119099491648512 [2022-11-18 19:53:43,671 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2236 transitions. [2022-11-18 19:53:43,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2236 transitions. [2022-11-18 19:53:43,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:43,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2236 transitions. [2022-11-18 19:53:43,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 124.22222222222223) internal successors, (2236), 18 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:43,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:43,693 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:43,694 INFO L175 Difference]: Start difference. First operand has 130 places, 122 transitions, 272 flow. Second operand 18 states and 2236 transitions. [2022-11-18 19:53:43,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 626 flow [2022-11-18 19:53:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 189 transitions, 624 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:53:43,702 INFO L231 Difference]: Finished difference. Result has 147 places, 134 transitions, 376 flow [2022-11-18 19:53:43,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=376, PETRI_PLACES=147, PETRI_TRANSITIONS=134} [2022-11-18 19:53:43,704 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 18 predicate places. [2022-11-18 19:53:43,704 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 134 transitions, 376 flow [2022-11-18 19:53:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 121.66666666666667) internal successors, (1460), 12 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:43,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:43,708 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:43,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:43,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-18 19:53:43,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1963171886, now seen corresponding path program 1 times [2022-11-18 19:53:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180372075] [2022-11-18 19:53:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:44,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:44,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180372075] [2022-11-18 19:53:44,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180372075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059819616] [2022-11-18 19:53:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:44,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:44,152 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:44,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:53:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:53:44,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:44,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:53:44,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059819616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:44,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:53:44,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 19:53:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136107456] [2022-11-18 19:53:44,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:44,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:53:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:53:44,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:53:44,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 153 [2022-11-18 19:53:44,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 134 transitions, 376 flow. Second operand has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:44,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:44,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 153 [2022-11-18 19:53:44,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:44,646 INFO L130 PetriNetUnfolder]: 141/766 cut-off events. [2022-11-18 19:53:44,646 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-11-18 19:53:44,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 766 events. 141/766 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3924 event pairs, 70 based on Foata normal form. 4/570 useless extension candidates. Maximal degree in co-relation 915. Up to 212 conditions per place. [2022-11-18 19:53:44,652 INFO L137 encePairwiseOnDemand]: 148/153 looper letters, 35 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2022-11-18 19:53:44,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 144 transitions, 475 flow [2022-11-18 19:53:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:53:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:53:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 871 transitions. [2022-11-18 19:53:44,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8132586367880486 [2022-11-18 19:53:44,656 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 871 transitions. [2022-11-18 19:53:44,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 871 transitions. [2022-11-18 19:53:44,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:44,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 871 transitions. [2022-11-18 19:53:44,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.42857142857143) internal successors, (871), 7 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:44,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:44,663 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:44,664 INFO L175 Difference]: Start difference. First operand has 147 places, 134 transitions, 376 flow. Second operand 7 states and 871 transitions. [2022-11-18 19:53:44,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 144 transitions, 475 flow [2022-11-18 19:53:44,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 144 transitions, 443 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-18 19:53:44,674 INFO L231 Difference]: Finished difference. Result has 143 places, 130 transitions, 339 flow [2022-11-18 19:53:44,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=143, PETRI_TRANSITIONS=130} [2022-11-18 19:53:44,677 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 14 predicate places. [2022-11-18 19:53:44,678 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 130 transitions, 339 flow [2022-11-18 19:53:44,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:44,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:44,679 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:44,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:44,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:44,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash -351439445, now seen corresponding path program 1 times [2022-11-18 19:53:44,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:44,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316792854] [2022-11-18 19:53:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:44,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316792854] [2022-11-18 19:53:45,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316792854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:45,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:45,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:53:45,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200267064] [2022-11-18 19:53:45,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:45,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:53:45,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:45,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:53:45,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:53:45,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-18 19:53:45,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 130 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:45,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-18 19:53:45,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:45,265 INFO L130 PetriNetUnfolder]: 113/662 cut-off events. [2022-11-18 19:53:45,266 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-18 19:53:45,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 662 events. 113/662 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3153 event pairs, 56 based on Foata normal form. 5/505 useless extension candidates. Maximal degree in co-relation 860. Up to 221 conditions per place. [2022-11-18 19:53:45,271 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 27 selfloop transitions, 6 changer transitions 3/135 dead transitions. [2022-11-18 19:53:45,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 135 transitions, 424 flow [2022-11-18 19:53:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:53:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:53:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 855 transitions. [2022-11-18 19:53:45,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7983193277310925 [2022-11-18 19:53:45,275 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 855 transitions. [2022-11-18 19:53:45,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 855 transitions. [2022-11-18 19:53:45,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:45,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 855 transitions. [2022-11-18 19:53:45,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.14285714285714) internal successors, (855), 7 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,281 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,281 INFO L175 Difference]: Start difference. First operand has 143 places, 130 transitions, 339 flow. Second operand 7 states and 855 transitions. [2022-11-18 19:53:45,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 135 transitions, 424 flow [2022-11-18 19:53:45,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 135 transitions, 410 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:53:45,290 INFO L231 Difference]: Finished difference. Result has 146 places, 130 transitions, 353 flow [2022-11-18 19:53:45,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=353, PETRI_PLACES=146, PETRI_TRANSITIONS=130} [2022-11-18 19:53:45,292 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 17 predicate places. [2022-11-18 19:53:45,292 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 130 transitions, 353 flow [2022-11-18 19:53:45,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:45,293 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:45,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:53:45,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:45,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1900699567, now seen corresponding path program 1 times [2022-11-18 19:53:45,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:45,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002816439] [2022-11-18 19:53:45,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:45,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:45,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:45,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002816439] [2022-11-18 19:53:45,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002816439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:45,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497962021] [2022-11-18 19:53:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:45,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:45,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:45,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:53:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:53:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:53:45,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:53:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497962021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:45,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:53:45,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-18 19:53:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453373708] [2022-11-18 19:53:45,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:53:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:53:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:53:45,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 153 [2022-11-18 19:53:45,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 130 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:45,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 153 [2022-11-18 19:53:45,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:45,898 INFO L130 PetriNetUnfolder]: 45/464 cut-off events. [2022-11-18 19:53:45,898 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-18 19:53:45,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 464 events. 45/464 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1884 event pairs, 20 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 601. Up to 84 conditions per place. [2022-11-18 19:53:45,901 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 9 selfloop transitions, 3 changer transitions 0/127 dead transitions. [2022-11-18 19:53:45,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 127 transitions, 365 flow [2022-11-18 19:53:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:53:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:53:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2022-11-18 19:53:45,904 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8415032679738562 [2022-11-18 19:53:45,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2022-11-18 19:53:45,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2022-11-18 19:53:45,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:45,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2022-11-18 19:53:45,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,908 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,908 INFO L175 Difference]: Start difference. First operand has 146 places, 130 transitions, 353 flow. Second operand 4 states and 515 transitions. [2022-11-18 19:53:45,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 127 transitions, 365 flow [2022-11-18 19:53:45,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 127 transitions, 353 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:53:45,914 INFO L231 Difference]: Finished difference. Result has 140 places, 127 transitions, 335 flow [2022-11-18 19:53:45,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=335, PETRI_PLACES=140, PETRI_TRANSITIONS=127} [2022-11-18 19:53:45,917 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2022-11-18 19:53:45,917 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 127 transitions, 335 flow [2022-11-18 19:53:45,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:45,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:45,918 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:45,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:46,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:46,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:46,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1211233909, now seen corresponding path program 1 times [2022-11-18 19:53:46,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:46,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437483392] [2022-11-18 19:53:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:46,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:53:46,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:46,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437483392] [2022-11-18 19:53:46,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437483392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:46,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:46,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:53:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557755901] [2022-11-18 19:53:46,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:46,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:53:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:46,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:53:46,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:53:46,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 153 [2022-11-18 19:53:46,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 127 transitions, 335 flow. Second operand has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:46,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 153 [2022-11-18 19:53:46,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:46,455 INFO L130 PetriNetUnfolder]: 185/760 cut-off events. [2022-11-18 19:53:46,455 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-18 19:53:46,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1572 conditions, 760 events. 185/760 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4491 event pairs, 92 based on Foata normal form. 0/672 useless extension candidates. Maximal degree in co-relation 1533. Up to 257 conditions per place. [2022-11-18 19:53:46,461 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 28 selfloop transitions, 4 changer transitions 0/143 dead transitions. [2022-11-18 19:53:46,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 143 transitions, 448 flow [2022-11-18 19:53:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:53:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:53:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 639 transitions. [2022-11-18 19:53:46,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8352941176470589 [2022-11-18 19:53:46,470 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 639 transitions. [2022-11-18 19:53:46,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 639 transitions. [2022-11-18 19:53:46,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:46,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 639 transitions. [2022-11-18 19:53:46,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,475 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,475 INFO L175 Difference]: Start difference. First operand has 140 places, 127 transitions, 335 flow. Second operand 5 states and 639 transitions. [2022-11-18 19:53:46,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 143 transitions, 448 flow [2022-11-18 19:53:46,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 143 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 19:53:46,480 INFO L231 Difference]: Finished difference. Result has 144 places, 130 transitions, 359 flow [2022-11-18 19:53:46,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=144, PETRI_TRANSITIONS=130} [2022-11-18 19:53:46,483 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 15 predicate places. [2022-11-18 19:53:46,484 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 130 transitions, 359 flow [2022-11-18 19:53:46,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:46,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:46,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:53:46,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash 45043235, now seen corresponding path program 1 times [2022-11-18 19:53:46,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:46,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156975319] [2022-11-18 19:53:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:46,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:53:46,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:46,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156975319] [2022-11-18 19:53:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156975319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:46,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:46,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:53:46,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463179256] [2022-11-18 19:53:46,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:46,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:53:46,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:53:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:53:46,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 153 [2022-11-18 19:53:46,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 130 transitions, 359 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:46,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 153 [2022-11-18 19:53:46,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:46,812 INFO L130 PetriNetUnfolder]: 61/712 cut-off events. [2022-11-18 19:53:46,812 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-18 19:53:46,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 712 events. 61/712 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3932 event pairs, 24 based on Foata normal form. 4/616 useless extension candidates. Maximal degree in co-relation 956. Up to 108 conditions per place. [2022-11-18 19:53:46,816 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 11 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2022-11-18 19:53:46,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 133 transitions, 403 flow [2022-11-18 19:53:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:53:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:53:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2022-11-18 19:53:46,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8474945533769063 [2022-11-18 19:53:46,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2022-11-18 19:53:46,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2022-11-18 19:53:46,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:46,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2022-11-18 19:53:46,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,822 INFO L175 Difference]: Start difference. First operand has 144 places, 130 transitions, 359 flow. Second operand 3 states and 389 transitions. [2022-11-18 19:53:46,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 133 transitions, 403 flow [2022-11-18 19:53:46,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 133 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:53:46,826 INFO L231 Difference]: Finished difference. Result has 146 places, 132 transitions, 386 flow [2022-11-18 19:53:46,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=386, PETRI_PLACES=146, PETRI_TRANSITIONS=132} [2022-11-18 19:53:46,827 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 17 predicate places. [2022-11-18 19:53:46,827 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 132 transitions, 386 flow [2022-11-18 19:53:46,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:46,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:46,828 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:53:46,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -425050445, now seen corresponding path program 1 times [2022-11-18 19:53:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118080404] [2022-11-18 19:53:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:53:46,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:46,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118080404] [2022-11-18 19:53:46,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118080404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:46,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008232503] [2022-11-18 19:53:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:46,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:46,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:46,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:46,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:53:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:53:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:47,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:47,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008232503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:47,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:53:47,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-18 19:53:47,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163709835] [2022-11-18 19:53:47,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:47,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:53:47,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:47,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:53:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:53:47,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 153 [2022-11-18 19:53:47,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 132 transitions, 386 flow. Second operand has 19 states, 19 states have (on average 104.36842105263158) internal successors, (1983), 19 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:47,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:47,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 153 [2022-11-18 19:53:47,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:48,418 INFO L130 PetriNetUnfolder]: 297/1022 cut-off events. [2022-11-18 19:53:48,418 INFO L131 PetriNetUnfolder]: For 639/639 co-relation queries the response was YES. [2022-11-18 19:53:48,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 1022 events. 297/1022 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 6170 event pairs, 34 based on Foata normal form. 15/948 useless extension candidates. Maximal degree in co-relation 2505. Up to 245 conditions per place. [2022-11-18 19:53:48,426 INFO L137 encePairwiseOnDemand]: 135/153 looper letters, 86 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2022-11-18 19:53:48,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 193 transitions, 848 flow [2022-11-18 19:53:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 19:53:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 19:53:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2310 transitions. [2022-11-18 19:53:48,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2022-11-18 19:53:48,432 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2310 transitions. [2022-11-18 19:53:48,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2310 transitions. [2022-11-18 19:53:48,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:48,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2310 transitions. [2022-11-18 19:53:48,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 105.0) internal successors, (2310), 22 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:48,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 153.0) internal successors, (3519), 23 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:48,448 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 153.0) internal successors, (3519), 23 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:48,448 INFO L175 Difference]: Start difference. First operand has 146 places, 132 transitions, 386 flow. Second operand 22 states and 2310 transitions. [2022-11-18 19:53:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 193 transitions, 848 flow [2022-11-18 19:53:48,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 193 transitions, 803 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-11-18 19:53:48,454 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 523 flow [2022-11-18 19:53:48,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=523, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2022-11-18 19:53:48,457 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 43 predicate places. [2022-11-18 19:53:48,457 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 523 flow [2022-11-18 19:53:48,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 104.36842105263158) internal successors, (1983), 19 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:48,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:48,459 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:48,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:48,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 19:53:48,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:53:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:48,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1427822257, now seen corresponding path program 1 times [2022-11-18 19:53:48,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:48,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187550698] [2022-11-18 19:53:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:48,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:49,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:49,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187550698] [2022-11-18 19:53:49,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187550698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803378225] [2022-11-18 19:53:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:49,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:49,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:49,873 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:49,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:53:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 19:53:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:50,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:53:50,499 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:53:50,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:53:50,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:53:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:53:51,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:53:52,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:53:52,172 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 19:53:52,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 19:53:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:52,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:52,305 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_147) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) 2147483648)) is different from false [2022-11-18 19:53:59,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:53:59,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-18 19:53:59,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:53:59,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 162 [2022-11-18 19:53:59,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-11-18 19:53:59,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-18 19:54:02,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:54:02,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:54:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:02,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803378225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:54:02,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:54:02,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 59 [2022-11-18 19:54:02,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008154806] [2022-11-18 19:54:02,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:02,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 19:54:02,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:02,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 19:54:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3168, Unknown=3, NotChecked=114, Total=3540 [2022-11-18 19:54:02,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 153 [2022-11-18 19:54:02,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 523 flow. Second operand has 60 states, 60 states have (on average 73.13333333333334) internal successors, (4388), 60 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:02,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:02,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 153 [2022-11-18 19:54:02,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:05,702 INFO L130 PetriNetUnfolder]: 814/2758 cut-off events. [2022-11-18 19:54:05,702 INFO L131 PetriNetUnfolder]: For 1856/2068 co-relation queries the response was YES. [2022-11-18 19:54:05,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6194 conditions, 2758 events. 814/2758 cut-off events. For 1856/2068 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 22142 event pairs, 451 based on Foata normal form. 44/2393 useless extension candidates. Maximal degree in co-relation 6055. Up to 1195 conditions per place. [2022-11-18 19:54:05,720 INFO L137 encePairwiseOnDemand]: 120/153 looper letters, 69 selfloop transitions, 31 changer transitions 15/181 dead transitions. [2022-11-18 19:54:05,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 181 transitions, 857 flow [2022-11-18 19:54:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 19:54:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-18 19:54:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2093 transitions. [2022-11-18 19:54:05,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48856209150326796 [2022-11-18 19:54:05,727 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2093 transitions. [2022-11-18 19:54:05,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2093 transitions. [2022-11-18 19:54:05,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:05,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2093 transitions. [2022-11-18 19:54:05,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 74.75) internal successors, (2093), 28 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:05,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 153.0) internal successors, (4437), 29 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:05,742 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 153.0) internal successors, (4437), 29 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:05,742 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 523 flow. Second operand 28 states and 2093 transitions. [2022-11-18 19:54:05,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 181 transitions, 857 flow [2022-11-18 19:54:05,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 181 transitions, 826 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-11-18 19:54:05,763 INFO L231 Difference]: Finished difference. Result has 205 places, 159 transitions, 679 flow [2022-11-18 19:54:05,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=679, PETRI_PLACES=205, PETRI_TRANSITIONS=159} [2022-11-18 19:54:05,765 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 76 predicate places. [2022-11-18 19:54:05,765 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 159 transitions, 679 flow [2022-11-18 19:54:05,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 73.13333333333334) internal successors, (4388), 60 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:05,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:05,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:05,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:05,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:05,973 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:05,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1579709723, now seen corresponding path program 2 times [2022-11-18 19:54:05,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:05,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152001133] [2022-11-18 19:54:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:05,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:07,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152001133] [2022-11-18 19:54:07,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152001133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:07,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40228906] [2022-11-18 19:54:07,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:54:07,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:07,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:07,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:07,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:54:07,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:54:07,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:54:07,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:54:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:08,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:54:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:54:08,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:54:08,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40228906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:08,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:54:08,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [22] total 26 [2022-11-18 19:54:08,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052655550] [2022-11-18 19:54:08,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:08,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:54:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:08,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:54:08,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:54:08,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 153 [2022-11-18 19:54:08,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 159 transitions, 679 flow. Second operand has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:08,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:08,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 153 [2022-11-18 19:54:08,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:09,450 INFO L130 PetriNetUnfolder]: 1393/4097 cut-off events. [2022-11-18 19:54:09,451 INFO L131 PetriNetUnfolder]: For 4682/4752 co-relation queries the response was YES. [2022-11-18 19:54:09,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11016 conditions, 4097 events. 1393/4097 cut-off events. For 4682/4752 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 36544 event pairs, 460 based on Foata normal form. 86/4089 useless extension candidates. Maximal degree in co-relation 10872. Up to 1308 conditions per place. [2022-11-18 19:54:09,494 INFO L137 encePairwiseOnDemand]: 145/153 looper letters, 64 selfloop transitions, 12 changer transitions 1/195 dead transitions. [2022-11-18 19:54:09,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 195 transitions, 994 flow [2022-11-18 19:54:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:54:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:54:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 711 transitions. [2022-11-18 19:54:09,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7745098039215687 [2022-11-18 19:54:09,500 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 711 transitions. [2022-11-18 19:54:09,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 711 transitions. [2022-11-18 19:54:09,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:09,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 711 transitions. [2022-11-18 19:54:09,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.5) internal successors, (711), 6 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:09,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:09,508 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:09,508 INFO L175 Difference]: Start difference. First operand has 205 places, 159 transitions, 679 flow. Second operand 6 states and 711 transitions. [2022-11-18 19:54:09,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 195 transitions, 994 flow [2022-11-18 19:54:09,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 195 transitions, 928 flow, removed 20 selfloop flow, removed 15 redundant places. [2022-11-18 19:54:09,551 INFO L231 Difference]: Finished difference. Result has 195 places, 164 transitions, 708 flow [2022-11-18 19:54:09,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=708, PETRI_PLACES=195, PETRI_TRANSITIONS=164} [2022-11-18 19:54:09,553 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 66 predicate places. [2022-11-18 19:54:09,553 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 164 transitions, 708 flow [2022-11-18 19:54:09,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:09,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:09,570 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:09,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:09,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:54:09,778 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash 461018195, now seen corresponding path program 1 times [2022-11-18 19:54:09,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:09,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706166622] [2022-11-18 19:54:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:09,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:12,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706166622] [2022-11-18 19:54:12,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706166622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:12,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732116211] [2022-11-18 19:54:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:12,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:12,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:12,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:12,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:54:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:12,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 19:54:12,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:12,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:54:12,239 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:54:12,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 19:54:12,906 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:54:12,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-18 19:54:13,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:54:13,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:54:14,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:54:14,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:54:14,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:54:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:14,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:15,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:15,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2022-11-18 19:54:15,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:15,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 182 [2022-11-18 19:54:15,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:15,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 164 [2022-11-18 19:54:15,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-18 19:54:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:17,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732116211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:54:17,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:54:17,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 58 [2022-11-18 19:54:17,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091069739] [2022-11-18 19:54:17,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:17,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-18 19:54:17,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:17,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-18 19:54:17,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3080, Unknown=13, NotChecked=0, Total=3422 [2022-11-18 19:54:17,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 153 [2022-11-18 19:54:17,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 164 transitions, 708 flow. Second operand has 59 states, 59 states have (on average 75.15254237288136) internal successors, (4434), 59 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:17,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:17,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 153 [2022-11-18 19:54:17,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:29,531 INFO L130 PetriNetUnfolder]: 1792/5304 cut-off events. [2022-11-18 19:54:29,531 INFO L131 PetriNetUnfolder]: For 7239/7632 co-relation queries the response was YES. [2022-11-18 19:54:29,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14724 conditions, 5304 events. 1792/5304 cut-off events. For 7239/7632 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 49800 event pairs, 522 based on Foata normal form. 185/5189 useless extension candidates. Maximal degree in co-relation 14565. Up to 1056 conditions per place. [2022-11-18 19:54:29,593 INFO L137 encePairwiseOnDemand]: 122/153 looper letters, 150 selfloop transitions, 73 changer transitions 1/294 dead transitions. [2022-11-18 19:54:29,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 294 transitions, 1754 flow [2022-11-18 19:54:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-18 19:54:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-18 19:54:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4004 transitions. [2022-11-18 19:54:29,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5032679738562091 [2022-11-18 19:54:29,603 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4004 transitions. [2022-11-18 19:54:29,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4004 transitions. [2022-11-18 19:54:29,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:29,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4004 transitions. [2022-11-18 19:54:29,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 77.0) internal successors, (4004), 52 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:29,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 153.0) internal successors, (8109), 53 states have internal predecessors, (8109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:29,630 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 153.0) internal successors, (8109), 53 states have internal predecessors, (8109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:29,630 INFO L175 Difference]: Start difference. First operand has 195 places, 164 transitions, 708 flow. Second operand 52 states and 4004 transitions. [2022-11-18 19:54:29,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 294 transitions, 1754 flow [2022-11-18 19:54:29,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 294 transitions, 1730 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-18 19:54:29,659 INFO L231 Difference]: Finished difference. Result has 256 places, 204 transitions, 1181 flow [2022-11-18 19:54:29,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1181, PETRI_PLACES=256, PETRI_TRANSITIONS=204} [2022-11-18 19:54:29,661 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 127 predicate places. [2022-11-18 19:54:29,661 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 204 transitions, 1181 flow [2022-11-18 19:54:29,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 75.15254237288136) internal successors, (4434), 59 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:29,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:29,663 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:29,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:29,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:54:29,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1421510028, now seen corresponding path program 1 times [2022-11-18 19:54:29,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:29,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832505351] [2022-11-18 19:54:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:30,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832505351] [2022-11-18 19:54:30,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832505351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118043574] [2022-11-18 19:54:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:30,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:30,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:30,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:54:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:30,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 19:54:30,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:31,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 19:54:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:31,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:31,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:54:31,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-11-18 19:54:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:32,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118043574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:54:32,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:54:32,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 11] total 41 [2022-11-18 19:54:32,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438097179] [2022-11-18 19:54:32,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:32,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 19:54:32,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:32,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 19:54:32,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 19:54:32,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 153 [2022-11-18 19:54:32,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 204 transitions, 1181 flow. Second operand has 42 states, 42 states have (on average 85.85714285714286) internal successors, (3606), 42 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:32,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:32,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 153 [2022-11-18 19:54:32,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:36,766 INFO L130 PetriNetUnfolder]: 2010/6375 cut-off events. [2022-11-18 19:54:36,766 INFO L131 PetriNetUnfolder]: For 17682/18388 co-relation queries the response was YES. [2022-11-18 19:54:36,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20201 conditions, 6375 events. 2010/6375 cut-off events. For 17682/18388 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 63116 event pairs, 215 based on Foata normal form. 265/6316 useless extension candidates. Maximal degree in co-relation 20022. Up to 987 conditions per place. [2022-11-18 19:54:36,827 INFO L137 encePairwiseOnDemand]: 123/153 looper letters, 178 selfloop transitions, 87 changer transitions 15/356 dead transitions. [2022-11-18 19:54:36,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 356 transitions, 2667 flow [2022-11-18 19:54:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 19:54:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-18 19:54:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3370 transitions. [2022-11-18 19:54:36,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5796353629170966 [2022-11-18 19:54:36,835 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3370 transitions. [2022-11-18 19:54:36,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3370 transitions. [2022-11-18 19:54:36,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:36,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3370 transitions. [2022-11-18 19:54:36,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 88.6842105263158) internal successors, (3370), 38 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 153.0) internal successors, (5967), 39 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,854 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 153.0) internal successors, (5967), 39 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,855 INFO L175 Difference]: Start difference. First operand has 256 places, 204 transitions, 1181 flow. Second operand 38 states and 3370 transitions. [2022-11-18 19:54:36,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 356 transitions, 2667 flow [2022-11-18 19:54:36,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 356 transitions, 2488 flow, removed 52 selfloop flow, removed 29 redundant places. [2022-11-18 19:54:36,958 INFO L231 Difference]: Finished difference. Result has 273 places, 245 transitions, 1671 flow [2022-11-18 19:54:36,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1671, PETRI_PLACES=273, PETRI_TRANSITIONS=245} [2022-11-18 19:54:36,959 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 144 predicate places. [2022-11-18 19:54:36,959 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 245 transitions, 1671 flow [2022-11-18 19:54:36,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 85.85714285714286) internal successors, (3606), 42 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:36,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:36,962 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:36,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:37,180 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1263421962, now seen corresponding path program 2 times [2022-11-18 19:54:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:37,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616874482] [2022-11-18 19:54:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:37,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:37,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:37,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616874482] [2022-11-18 19:54:37,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616874482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:37,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874200252] [2022-11-18 19:54:37,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:54:37,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:37,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:37,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:37,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:54:37,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:54:37,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:54:37,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:54:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 19:54:37,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 19:54:37,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874200252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:54:37,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:54:37,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-18 19:54:37,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695780500] [2022-11-18 19:54:37,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:37,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:54:37,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:37,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:54:37,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:54:37,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 153 [2022-11-18 19:54:37,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 245 transitions, 1671 flow. Second operand has 18 states, 18 states have (on average 112.61111111111111) internal successors, (2027), 18 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:37,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:37,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 153 [2022-11-18 19:54:37,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:39,292 INFO L130 PetriNetUnfolder]: 616/4065 cut-off events. [2022-11-18 19:54:39,293 INFO L131 PetriNetUnfolder]: For 25950/26334 co-relation queries the response was YES. [2022-11-18 19:54:39,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14734 conditions, 4065 events. 616/4065 cut-off events. For 25950/26334 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 41127 event pairs, 151 based on Foata normal form. 62/3959 useless extension candidates. Maximal degree in co-relation 14570. Up to 618 conditions per place. [2022-11-18 19:54:39,329 INFO L137 encePairwiseOnDemand]: 142/153 looper letters, 233 selfloop transitions, 25 changer transitions 0/415 dead transitions. [2022-11-18 19:54:39,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 415 transitions, 4129 flow [2022-11-18 19:54:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 19:54:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 19:54:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2713 transitions. [2022-11-18 19:54:39,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7388344226579521 [2022-11-18 19:54:39,336 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2713 transitions. [2022-11-18 19:54:39,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2713 transitions. [2022-11-18 19:54:39,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:39,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2713 transitions. [2022-11-18 19:54:39,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 113.04166666666667) internal successors, (2713), 24 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:39,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 153.0) internal successors, (3825), 25 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:39,351 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 153.0) internal successors, (3825), 25 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:39,352 INFO L175 Difference]: Start difference. First operand has 273 places, 245 transitions, 1671 flow. Second operand 24 states and 2713 transitions. [2022-11-18 19:54:39,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 415 transitions, 4129 flow [2022-11-18 19:54:39,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 415 transitions, 3495 flow, removed 292 selfloop flow, removed 25 redundant places. [2022-11-18 19:54:39,557 INFO L231 Difference]: Finished difference. Result has 267 places, 249 transitions, 1536 flow [2022-11-18 19:54:39,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1536, PETRI_PLACES=267, PETRI_TRANSITIONS=249} [2022-11-18 19:54:39,559 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 138 predicate places. [2022-11-18 19:54:39,559 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 249 transitions, 1536 flow [2022-11-18 19:54:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 112.61111111111111) internal successors, (2027), 18 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:39,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:39,560 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:39,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:39,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:39,766 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash 790246699, now seen corresponding path program 1 times [2022-11-18 19:54:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:39,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729574030] [2022-11-18 19:54:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:39,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:54:39,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729574030] [2022-11-18 19:54:39,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729574030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:39,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:54:39,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:54:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083285248] [2022-11-18 19:54:39,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:39,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:54:39,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:54:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:54:39,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 153 [2022-11-18 19:54:39,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 249 transitions, 1536 flow. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:39,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:39,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 153 [2022-11-18 19:54:39,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:41,350 INFO L130 PetriNetUnfolder]: 798/5066 cut-off events. [2022-11-18 19:54:41,350 INFO L131 PetriNetUnfolder]: For 38231/38730 co-relation queries the response was YES. [2022-11-18 19:54:41,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18756 conditions, 5066 events. 798/5066 cut-off events. For 38231/38730 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 52003 event pairs, 69 based on Foata normal form. 172/4955 useless extension candidates. Maximal degree in co-relation 18600. Up to 859 conditions per place. [2022-11-18 19:54:41,393 INFO L137 encePairwiseOnDemand]: 149/153 looper letters, 20 selfloop transitions, 36 changer transitions 22/251 dead transitions. [2022-11-18 19:54:41,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 251 transitions, 1732 flow [2022-11-18 19:54:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:54:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:54:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 528 transitions. [2022-11-18 19:54:41,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8627450980392157 [2022-11-18 19:54:41,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 528 transitions. [2022-11-18 19:54:41,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 528 transitions. [2022-11-18 19:54:41,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:41,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 528 transitions. [2022-11-18 19:54:41,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:41,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:41,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:41,401 INFO L175 Difference]: Start difference. First operand has 267 places, 249 transitions, 1536 flow. Second operand 4 states and 528 transitions. [2022-11-18 19:54:41,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 251 transitions, 1732 flow [2022-11-18 19:54:41,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 251 transitions, 1624 flow, removed 24 selfloop flow, removed 19 redundant places. [2022-11-18 19:54:41,613 INFO L231 Difference]: Finished difference. Result has 251 places, 225 transitions, 1484 flow [2022-11-18 19:54:41,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1484, PETRI_PLACES=251, PETRI_TRANSITIONS=225} [2022-11-18 19:54:41,614 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 122 predicate places. [2022-11-18 19:54:41,615 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 225 transitions, 1484 flow [2022-11-18 19:54:41,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:41,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:41,615 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:41,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 19:54:41,616 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1800901537, now seen corresponding path program 3 times [2022-11-18 19:54:41,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:41,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484568684] [2022-11-18 19:54:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:41,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:44,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:44,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484568684] [2022-11-18 19:54:44,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484568684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637362807] [2022-11-18 19:54:44,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:54:44,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:44,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:44,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:44,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:54:44,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:54:44,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:54:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 19:54:44,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:44,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:54:44,913 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:54:44,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:54:45,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:54:45,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:54:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:54:45,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:54:45,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637362807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:45,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:54:45,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [26] total 37 [2022-11-18 19:54:45,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795635714] [2022-11-18 19:54:45,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:45,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:54:45,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:45,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:54:45,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 19:54:45,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 153 [2022-11-18 19:54:45,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 225 transitions, 1484 flow. Second operand has 13 states, 13 states have (on average 93.46153846153847) internal successors, (1215), 13 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:45,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:45,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 153 [2022-11-18 19:54:45,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:48,325 INFO L130 PetriNetUnfolder]: 4070/11871 cut-off events. [2022-11-18 19:54:48,326 INFO L131 PetriNetUnfolder]: For 135103/139001 co-relation queries the response was YES. [2022-11-18 19:54:48,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51124 conditions, 11871 events. 4070/11871 cut-off events. For 135103/139001 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 122665 event pairs, 1058 based on Foata normal form. 340/11371 useless extension candidates. Maximal degree in co-relation 51080. Up to 3594 conditions per place. [2022-11-18 19:54:48,435 INFO L137 encePairwiseOnDemand]: 138/153 looper letters, 123 selfloop transitions, 28 changer transitions 4/258 dead transitions. [2022-11-18 19:54:48,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 258 transitions, 2096 flow [2022-11-18 19:54:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:54:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 19:54:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1350 transitions. [2022-11-18 19:54:48,440 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6302521008403361 [2022-11-18 19:54:48,440 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1350 transitions. [2022-11-18 19:54:48,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1350 transitions. [2022-11-18 19:54:48,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:48,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1350 transitions. [2022-11-18 19:54:48,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.42857142857143) internal successors, (1350), 14 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:48,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 153.0) internal successors, (2295), 15 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:48,447 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 153.0) internal successors, (2295), 15 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:48,448 INFO L175 Difference]: Start difference. First operand has 251 places, 225 transitions, 1484 flow. Second operand 14 states and 1350 transitions. [2022-11-18 19:54:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 258 transitions, 2096 flow [2022-11-18 19:54:49,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 258 transitions, 1894 flow, removed 89 selfloop flow, removed 6 redundant places. [2022-11-18 19:54:49,377 INFO L231 Difference]: Finished difference. Result has 241 places, 226 transitions, 1424 flow [2022-11-18 19:54:49,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1424, PETRI_PLACES=241, PETRI_TRANSITIONS=226} [2022-11-18 19:54:49,378 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 112 predicate places. [2022-11-18 19:54:49,378 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 226 transitions, 1424 flow [2022-11-18 19:54:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 93.46153846153847) internal successors, (1215), 13 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:49,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:49,379 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:49,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:49,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:49,584 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1798637939, now seen corresponding path program 2 times [2022-11-18 19:54:49,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:49,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847301060] [2022-11-18 19:54:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:49,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:52,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:52,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847301060] [2022-11-18 19:54:52,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847301060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:52,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152123790] [2022-11-18 19:54:52,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:54:52,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:52,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:52,843 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:52,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:54:52,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:54:52,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:54:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:54:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:53,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:54:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:54:53,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:54:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152123790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:53,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:54:53,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26] total 30 [2022-11-18 19:54:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429229449] [2022-11-18 19:54:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:53,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:54:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:54:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-11-18 19:54:53,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 153 [2022-11-18 19:54:53,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 226 transitions, 1424 flow. Second operand has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:53,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:53,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 153 [2022-11-18 19:54:53,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:55,912 INFO L130 PetriNetUnfolder]: 4108/12013 cut-off events. [2022-11-18 19:54:55,913 INFO L131 PetriNetUnfolder]: For 67418/70755 co-relation queries the response was YES. [2022-11-18 19:54:55,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45194 conditions, 12013 events. 4108/12013 cut-off events. For 67418/70755 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 125038 event pairs, 1206 based on Foata normal form. 582/11703 useless extension candidates. Maximal degree in co-relation 45151. Up to 3751 conditions per place. [2022-11-18 19:54:56,004 INFO L137 encePairwiseOnDemand]: 145/153 looper letters, 123 selfloop transitions, 20 changer transitions 0/266 dead transitions. [2022-11-18 19:54:56,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 266 transitions, 2086 flow [2022-11-18 19:54:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:54:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:54:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 711 transitions. [2022-11-18 19:54:56,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7745098039215687 [2022-11-18 19:54:56,007 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 711 transitions. [2022-11-18 19:54:56,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 711 transitions. [2022-11-18 19:54:56,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:56,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 711 transitions. [2022-11-18 19:54:56,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.5) internal successors, (711), 6 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:56,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:56,011 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:56,011 INFO L175 Difference]: Start difference. First operand has 241 places, 226 transitions, 1424 flow. Second operand 6 states and 711 transitions. [2022-11-18 19:54:56,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 266 transitions, 2086 flow [2022-11-18 19:54:56,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 266 transitions, 2041 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-11-18 19:54:56,221 INFO L231 Difference]: Finished difference. Result has 237 places, 227 transitions, 1446 flow [2022-11-18 19:54:56,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1446, PETRI_PLACES=237, PETRI_TRANSITIONS=227} [2022-11-18 19:54:56,222 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 108 predicate places. [2022-11-18 19:54:56,222 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 227 transitions, 1446 flow [2022-11-18 19:54:56,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:56,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:56,223 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:56,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 19:54:56,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 19:54:56,428 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1935395143, now seen corresponding path program 1 times [2022-11-18 19:54:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:56,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529440589] [2022-11-18 19:54:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:54:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529440589] [2022-11-18 19:54:56,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529440589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956414272] [2022-11-18 19:54:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:56,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:56,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:56,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:56,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:54:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:56,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:54:56,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:54:56,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:54:56,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956414272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:54:56,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:54:56,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 19:54:56,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429235459] [2022-11-18 19:54:56,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:54:56,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:54:56,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:54:56,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:54:56,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 153 [2022-11-18 19:54:56,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 227 transitions, 1446 flow. Second operand has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:56,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:54:56,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 153 [2022-11-18 19:54:56,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:54:58,145 INFO L130 PetriNetUnfolder]: 1291/5935 cut-off events. [2022-11-18 19:54:58,145 INFO L131 PetriNetUnfolder]: For 23185/23752 co-relation queries the response was YES. [2022-11-18 19:54:58,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 5935 events. 1291/5935 cut-off events. For 23185/23752 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 59232 event pairs, 174 based on Foata normal form. 315/5959 useless extension candidates. Maximal degree in co-relation 21980. Up to 1714 conditions per place. [2022-11-18 19:54:58,198 INFO L137 encePairwiseOnDemand]: 148/153 looper letters, 81 selfloop transitions, 8 changer transitions 0/250 dead transitions. [2022-11-18 19:54:58,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 250 transitions, 1810 flow [2022-11-18 19:54:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:54:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:54:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 882 transitions. [2022-11-18 19:54:58,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8235294117647058 [2022-11-18 19:54:58,202 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 882 transitions. [2022-11-18 19:54:58,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 882 transitions. [2022-11-18 19:54:58,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:54:58,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 882 transitions. [2022-11-18 19:54:58,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:58,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:58,208 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:58,208 INFO L175 Difference]: Start difference. First operand has 237 places, 227 transitions, 1446 flow. Second operand 7 states and 882 transitions. [2022-11-18 19:54:58,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 250 transitions, 1810 flow [2022-11-18 19:54:58,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 250 transitions, 1770 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-18 19:54:58,297 INFO L231 Difference]: Finished difference. Result has 238 places, 225 transitions, 1414 flow [2022-11-18 19:54:58,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1414, PETRI_PLACES=238, PETRI_TRANSITIONS=225} [2022-11-18 19:54:58,298 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 109 predicate places. [2022-11-18 19:54:58,298 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 225 transitions, 1414 flow [2022-11-18 19:54:58,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:58,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:54:58,299 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:58,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:58,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 19:54:58,506 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:54:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1632092576, now seen corresponding path program 2 times [2022-11-18 19:54:58,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:58,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372104679] [2022-11-18 19:54:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:02,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:02,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372104679] [2022-11-18 19:55:02,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372104679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:02,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567435595] [2022-11-18 19:55:02,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:55:02,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:02,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:02,253 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:02,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:55:02,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:55:02,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:55:02,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 19:55:02,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:02,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:55:02,672 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:55:02,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:55:03,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:55:03,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:55:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:55:03,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:55:03,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567435595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:55:03,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:55:03,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [26] total 37 [2022-11-18 19:55:03,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754365111] [2022-11-18 19:55:03,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:55:03,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:55:03,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:03,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:55:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 19:55:03,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 153 [2022-11-18 19:55:03,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 225 transitions, 1414 flow. Second operand has 13 states, 13 states have (on average 93.53846153846153) internal successors, (1216), 13 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:03,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:03,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 153 [2022-11-18 19:55:03,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:55:05,873 INFO L130 PetriNetUnfolder]: 4093/11495 cut-off events. [2022-11-18 19:55:05,873 INFO L131 PetriNetUnfolder]: For 68204/71572 co-relation queries the response was YES. [2022-11-18 19:55:05,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43824 conditions, 11495 events. 4093/11495 cut-off events. For 68204/71572 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 116689 event pairs, 1114 based on Foata normal form. 328/10935 useless extension candidates. Maximal degree in co-relation 43783. Up to 3754 conditions per place. [2022-11-18 19:55:05,954 INFO L137 encePairwiseOnDemand]: 138/153 looper letters, 110 selfloop transitions, 28 changer transitions 14/253 dead transitions. [2022-11-18 19:55:05,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 253 transitions, 1909 flow [2022-11-18 19:55:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:55:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 19:55:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1346 transitions. [2022-11-18 19:55:05,958 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6283846872082166 [2022-11-18 19:55:05,958 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1346 transitions. [2022-11-18 19:55:05,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1346 transitions. [2022-11-18 19:55:05,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:55:05,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1346 transitions. [2022-11-18 19:55:05,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.14285714285714) internal successors, (1346), 14 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:05,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 153.0) internal successors, (2295), 15 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:05,967 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 153.0) internal successors, (2295), 15 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:05,968 INFO L175 Difference]: Start difference. First operand has 238 places, 225 transitions, 1414 flow. Second operand 14 states and 1346 transitions. [2022-11-18 19:55:05,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 253 transitions, 1909 flow [2022-11-18 19:55:06,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 253 transitions, 1894 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-18 19:55:06,190 INFO L231 Difference]: Finished difference. Result has 246 places, 221 transitions, 1401 flow [2022-11-18 19:55:06,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1401, PETRI_PLACES=246, PETRI_TRANSITIONS=221} [2022-11-18 19:55:06,191 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 117 predicate places. [2022-11-18 19:55:06,191 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 221 transitions, 1401 flow [2022-11-18 19:55:06,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 93.53846153846153) internal successors, (1216), 13 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:06,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:55:06,192 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:06,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:06,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 19:55:06,392 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:55:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:06,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1725937726, now seen corresponding path program 1 times [2022-11-18 19:55:06,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:06,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429796976] [2022-11-18 19:55:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:06,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:09,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:09,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429796976] [2022-11-18 19:55:09,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429796976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530309728] [2022-11-18 19:55:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:09,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:09,603 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 19:55:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 19:55:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:09,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:55:10,083 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:55:10,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:55:10,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:55:11,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:55:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:11,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:11,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2022-11-18 19:55:11,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-18 19:55:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:13,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530309728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:13,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:55:13,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 63 [2022-11-18 19:55:13,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253980619] [2022-11-18 19:55:13,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:13,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-18 19:55:13,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-18 19:55:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3656, Unknown=12, NotChecked=0, Total=4032 [2022-11-18 19:55:13,559 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 153 [2022-11-18 19:55:13,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 221 transitions, 1401 flow. Second operand has 64 states, 64 states have (on average 73.546875) internal successors, (4707), 64 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:13,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:13,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 153 [2022-11-18 19:55:13,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:55:21,248 INFO L130 PetriNetUnfolder]: 4140/11372 cut-off events. [2022-11-18 19:55:21,249 INFO L131 PetriNetUnfolder]: For 71702/74604 co-relation queries the response was YES. [2022-11-18 19:55:21,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43694 conditions, 11372 events. 4140/11372 cut-off events. For 71702/74604 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 113990 event pairs, 519 based on Foata normal form. 750/11373 useless extension candidates. Maximal degree in co-relation 43654. Up to 2806 conditions per place. [2022-11-18 19:55:21,325 INFO L137 encePairwiseOnDemand]: 121/153 looper letters, 241 selfloop transitions, 116 changer transitions 0/417 dead transitions. [2022-11-18 19:55:21,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 417 transitions, 4027 flow [2022-11-18 19:55:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 19:55:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-18 19:55:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3316 transitions. [2022-11-18 19:55:21,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49257278669043375 [2022-11-18 19:55:21,331 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3316 transitions. [2022-11-18 19:55:21,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3316 transitions. [2022-11-18 19:55:21,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:55:21,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3316 transitions. [2022-11-18 19:55:21,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 75.36363636363636) internal successors, (3316), 44 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:21,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 153.0) internal successors, (6885), 45 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:21,349 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 153.0) internal successors, (6885), 45 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:21,349 INFO L175 Difference]: Start difference. First operand has 246 places, 221 transitions, 1401 flow. Second operand 44 states and 3316 transitions. [2022-11-18 19:55:21,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 417 transitions, 4027 flow [2022-11-18 19:55:21,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 417 transitions, 3730 flow, removed 68 selfloop flow, removed 16 redundant places. [2022-11-18 19:55:21,533 INFO L231 Difference]: Finished difference. Result has 275 places, 274 transitions, 2260 flow [2022-11-18 19:55:21,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2260, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2022-11-18 19:55:21,533 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 146 predicate places. [2022-11-18 19:55:21,533 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 2260 flow [2022-11-18 19:55:21,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 73.546875) internal successors, (4707), 64 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:21,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:55:21,534 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:21,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:21,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:21,735 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:55:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:21,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1895659313, now seen corresponding path program 2 times [2022-11-18 19:55:21,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:21,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876809631] [2022-11-18 19:55:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:21,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:21,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:21,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876809631] [2022-11-18 19:55:21,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876809631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:21,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284070741] [2022-11-18 19:55:21,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:55:21,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:21,968 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:21,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 19:55:22,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:55:22,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:55:22,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:55:22,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 19:55:22,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 19:55:22,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284070741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:22,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:55:22,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2022-11-18 19:55:22,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291679604] [2022-11-18 19:55:22,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:22,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:55:22,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:22,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:55:22,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:55:22,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 153 [2022-11-18 19:55:22,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 2260 flow. Second operand has 16 states, 16 states have (on average 98.375) internal successors, (1574), 16 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:22,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:22,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 153 [2022-11-18 19:55:22,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:55:24,221 INFO L130 PetriNetUnfolder]: 1168/5227 cut-off events. [2022-11-18 19:55:24,221 INFO L131 PetriNetUnfolder]: For 25739/26017 co-relation queries the response was YES. [2022-11-18 19:55:24,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21116 conditions, 5227 events. 1168/5227 cut-off events. For 25739/26017 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 49715 event pairs, 159 based on Foata normal form. 283/5255 useless extension candidates. Maximal degree in co-relation 21071. Up to 920 conditions per place. [2022-11-18 19:55:24,266 INFO L137 encePairwiseOnDemand]: 133/153 looper letters, 183 selfloop transitions, 54 changer transitions 2/369 dead transitions. [2022-11-18 19:55:24,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 369 transitions, 3552 flow [2022-11-18 19:55:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 19:55:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-18 19:55:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2716 transitions. [2022-11-18 19:55:24,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6339869281045751 [2022-11-18 19:55:24,271 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2716 transitions. [2022-11-18 19:55:24,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2716 transitions. [2022-11-18 19:55:24,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:55:24,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2716 transitions. [2022-11-18 19:55:24,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 97.0) internal successors, (2716), 28 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:24,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 153.0) internal successors, (4437), 29 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:24,283 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 153.0) internal successors, (4437), 29 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:24,283 INFO L175 Difference]: Start difference. First operand has 275 places, 274 transitions, 2260 flow. Second operand 28 states and 2716 transitions. [2022-11-18 19:55:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 369 transitions, 3552 flow [2022-11-18 19:55:24,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 369 transitions, 3355 flow, removed 52 selfloop flow, removed 27 redundant places. [2022-11-18 19:55:24,401 INFO L231 Difference]: Finished difference. Result has 278 places, 287 transitions, 2372 flow [2022-11-18 19:55:24,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2372, PETRI_PLACES=278, PETRI_TRANSITIONS=287} [2022-11-18 19:55:24,402 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 149 predicate places. [2022-11-18 19:55:24,402 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 287 transitions, 2372 flow [2022-11-18 19:55:24,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 98.375) internal successors, (1574), 16 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:24,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:55:24,403 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:24,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:24,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:24,608 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:55:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 355380723, now seen corresponding path program 1 times [2022-11-18 19:55:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:24,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283956752] [2022-11-18 19:55:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:24,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:26,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283956752] [2022-11-18 19:55:26,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283956752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954687845] [2022-11-18 19:55:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:26,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:26,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:26,675 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:26,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 19:55:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:26,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 19:55:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:26,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:55:27,136 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:55:27,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:55:28,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:55:28,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:55:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:28,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:28,441 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_465 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_465) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) 2147483648)) is different from false [2022-11-18 19:55:28,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:28,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2022-11-18 19:55:28,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-18 19:55:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:30,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954687845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:30,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:55:30,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 66 [2022-11-18 19:55:30,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540727465] [2022-11-18 19:55:30,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:30,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-18 19:55:30,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-18 19:55:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=3877, Unknown=1, NotChecked=128, Total=4422 [2022-11-18 19:55:30,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 153 [2022-11-18 19:55:30,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 287 transitions, 2372 flow. Second operand has 67 states, 67 states have (on average 73.43283582089552) internal successors, (4920), 67 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:30,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:30,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 153 [2022-11-18 19:55:30,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:55:35,515 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (<= (select (select |c_#memory_int| c_~q~0.base) .cse0) 2147483647) (= c_~s~0 0) (forall ((v_ArrVal_465 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_465) c_~q~0.base) .cse0)) 2147483648)))) is different from false [2022-11-18 19:55:40,715 INFO L130 PetriNetUnfolder]: 4233/11391 cut-off events. [2022-11-18 19:55:40,715 INFO L131 PetriNetUnfolder]: For 94286/97922 co-relation queries the response was YES. [2022-11-18 19:55:40,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49103 conditions, 11391 events. 4233/11391 cut-off events. For 94286/97922 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 113218 event pairs, 642 based on Foata normal form. 1045/11826 useless extension candidates. Maximal degree in co-relation 49056. Up to 2974 conditions per place. [2022-11-18 19:55:40,792 INFO L137 encePairwiseOnDemand]: 119/153 looper letters, 247 selfloop transitions, 136 changer transitions 5/456 dead transitions. [2022-11-18 19:55:40,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 456 transitions, 4578 flow [2022-11-18 19:55:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 19:55:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-18 19:55:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4061 transitions. [2022-11-18 19:55:40,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4915274751876059 [2022-11-18 19:55:40,800 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4061 transitions. [2022-11-18 19:55:40,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4061 transitions. [2022-11-18 19:55:40,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:55:40,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4061 transitions. [2022-11-18 19:55:40,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 75.20370370370371) internal successors, (4061), 54 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:40,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 153.0) internal successors, (8415), 55 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:40,819 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 153.0) internal successors, (8415), 55 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:40,819 INFO L175 Difference]: Start difference. First operand has 278 places, 287 transitions, 2372 flow. Second operand 54 states and 4061 transitions. [2022-11-18 19:55:40,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 456 transitions, 4578 flow [2022-11-18 19:55:41,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 456 transitions, 4537 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-11-18 19:55:41,202 INFO L231 Difference]: Finished difference. Result has 329 places, 341 transitions, 3448 flow [2022-11-18 19:55:41,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=3448, PETRI_PLACES=329, PETRI_TRANSITIONS=341} [2022-11-18 19:55:41,203 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 200 predicate places. [2022-11-18 19:55:41,203 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 341 transitions, 3448 flow [2022-11-18 19:55:41,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 73.43283582089552) internal successors, (4920), 67 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:41,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:55:41,204 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:41,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:41,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 19:55:41,407 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:55:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2024742325, now seen corresponding path program 1 times [2022-11-18 19:55:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:41,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101566547] [2022-11-18 19:55:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:43,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:43,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101566547] [2022-11-18 19:55:43,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101566547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:43,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295887459] [2022-11-18 19:55:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:43,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:43,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:43,031 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:43,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 19:55:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:43,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:55:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:43,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:55:43,486 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:55:43,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:55:44,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:55:45,206 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-18 19:55:45,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 16 [2022-11-18 19:55:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:45,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:45,865 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-18 19:55:45,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 115 [2022-11-18 19:55:45,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:45,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 55 [2022-11-18 19:55:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:50,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295887459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:50,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:55:50,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 68 [2022-11-18 19:55:50,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109007459] [2022-11-18 19:55:50,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:50,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 19:55:50,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 19:55:50,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=4269, Unknown=2, NotChecked=0, Total=4692 [2022-11-18 19:55:50,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 153 [2022-11-18 19:55:50,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 341 transitions, 3448 flow. Second operand has 69 states, 69 states have (on average 76.40579710144928) internal successors, (5272), 69 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:50,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:55:50,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 153 [2022-11-18 19:55:50,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:56:21,615 WARN L233 SmtUtils]: Spent 26.64s on a formula simplification. DAG size of input: 99 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:56:29,288 INFO L130 PetriNetUnfolder]: 4062/11209 cut-off events. [2022-11-18 19:56:29,288 INFO L131 PetriNetUnfolder]: For 111895/116132 co-relation queries the response was YES. [2022-11-18 19:56:29,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53304 conditions, 11209 events. 4062/11209 cut-off events. For 111895/116132 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 111408 event pairs, 788 based on Foata normal form. 1000/11680 useless extension candidates. Maximal degree in co-relation 53245. Up to 2466 conditions per place. [2022-11-18 19:56:29,385 INFO L137 encePairwiseOnDemand]: 120/153 looper letters, 267 selfloop transitions, 173 changer transitions 0/514 dead transitions. [2022-11-18 19:56:29,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 514 transitions, 6037 flow [2022-11-18 19:56:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 19:56:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-18 19:56:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3699 transitions. [2022-11-18 19:56:29,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5143929912390488 [2022-11-18 19:56:29,391 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3699 transitions. [2022-11-18 19:56:29,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3699 transitions. [2022-11-18 19:56:29,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:56:29,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3699 transitions. [2022-11-18 19:56:29,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 78.70212765957447) internal successors, (3699), 47 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:29,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 153.0) internal successors, (7344), 48 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:29,410 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 153.0) internal successors, (7344), 48 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:29,410 INFO L175 Difference]: Start difference. First operand has 329 places, 341 transitions, 3448 flow. Second operand 47 states and 3699 transitions. [2022-11-18 19:56:29,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 514 transitions, 6037 flow [2022-11-18 19:56:29,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 514 transitions, 5927 flow, removed 20 selfloop flow, removed 29 redundant places. [2022-11-18 19:56:29,938 INFO L231 Difference]: Finished difference. Result has 354 places, 410 transitions, 4877 flow [2022-11-18 19:56:29,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4877, PETRI_PLACES=354, PETRI_TRANSITIONS=410} [2022-11-18 19:56:29,939 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 225 predicate places. [2022-11-18 19:56:29,939 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 410 transitions, 4877 flow [2022-11-18 19:56:29,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 76.40579710144928) internal successors, (5272), 69 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:29,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:56:29,941 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:56:29,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:30,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 19:56:30,143 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:56:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:30,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1198379717, now seen corresponding path program 2 times [2022-11-18 19:56:30,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:56:30,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882991142] [2022-11-18 19:56:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:56:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:31,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:56:31,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882991142] [2022-11-18 19:56:31,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882991142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:56:31,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600521938] [2022-11-18 19:56:31,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:56:31,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:56:31,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:56:31,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:56:31,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 19:56:31,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:56:31,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:56:31,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 19:56:31,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:32,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:56:33,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:56:34,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:56:34,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 19:56:34,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:34,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 13 [2022-11-18 19:56:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:34,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:56:37,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:37,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 82 [2022-11-18 19:56:37,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:37,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 236 [2022-11-18 19:56:37,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:37,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 146 [2022-11-18 19:56:37,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:37,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 143 [2022-11-18 19:56:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:41,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600521938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:56:41,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:56:41,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25] total 69 [2022-11-18 19:56:41,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841423863] [2022-11-18 19:56:41,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:56:41,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-18 19:56:41,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:56:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-18 19:56:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=4412, Unknown=12, NotChecked=0, Total=4830 [2022-11-18 19:56:41,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 153 [2022-11-18 19:56:41,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 410 transitions, 4877 flow. Second operand has 70 states, 70 states have (on average 78.32857142857142) internal successors, (5483), 70 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:56:41,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:56:41,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 153 [2022-11-18 19:56:41,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:57:09,911 INFO L130 PetriNetUnfolder]: 4839/13615 cut-off events. [2022-11-18 19:57:09,911 INFO L131 PetriNetUnfolder]: For 210991/216021 co-relation queries the response was YES. [2022-11-18 19:57:10,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80808 conditions, 13615 events. 4839/13615 cut-off events. For 210991/216021 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 140533 event pairs, 289 based on Foata normal form. 1714/14838 useless extension candidates. Maximal degree in co-relation 80738. Up to 3024 conditions per place. [2022-11-18 19:57:10,073 INFO L137 encePairwiseOnDemand]: 119/153 looper letters, 314 selfloop transitions, 336 changer transitions 21/748 dead transitions. [2022-11-18 19:57:10,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 748 transitions, 10854 flow [2022-11-18 19:57:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 19:57:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-11-18 19:57:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6825 transitions. [2022-11-18 19:57:10,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.52479815455594 [2022-11-18 19:57:10,083 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6825 transitions. [2022-11-18 19:57:10,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6825 transitions. [2022-11-18 19:57:10,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:57:10,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6825 transitions. [2022-11-18 19:57:10,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 80.29411764705883) internal successors, (6825), 85 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:10,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 153.0) internal successors, (13158), 86 states have internal predecessors, (13158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:10,115 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 153.0) internal successors, (13158), 86 states have internal predecessors, (13158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:10,116 INFO L175 Difference]: Start difference. First operand has 354 places, 410 transitions, 4877 flow. Second operand 85 states and 6825 transitions. [2022-11-18 19:57:10,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 748 transitions, 10854 flow [2022-11-18 19:57:11,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 748 transitions, 10670 flow, removed 49 selfloop flow, removed 25 redundant places. [2022-11-18 19:57:11,374 INFO L231 Difference]: Finished difference. Result has 440 places, 543 transitions, 8046 flow [2022-11-18 19:57:11,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=8046, PETRI_PLACES=440, PETRI_TRANSITIONS=543} [2022-11-18 19:57:11,375 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 311 predicate places. [2022-11-18 19:57:11,375 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 543 transitions, 8046 flow [2022-11-18 19:57:11,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 78.32857142857142) internal successors, (5483), 70 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:11,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:57:11,376 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:11,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:11,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 19:57:11,576 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:57:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1470863478, now seen corresponding path program 1 times [2022-11-18 19:57:11,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:11,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957175914] [2022-11-18 19:57:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:12,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:12,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957175914] [2022-11-18 19:57:12,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957175914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:12,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546412701] [2022-11-18 19:57:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:12,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:12,764 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:12,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 19:57:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 19:57:12,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:12,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:57:13,385 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:57:13,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:57:13,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:57:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:14,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-18 19:57:15,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-18 19:57:16,220 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-18 19:57:16,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2022-11-18 19:57:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:16,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:16,876 WARN L837 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse6 c_~q~0.offset)) (.cse2 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_560 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_560) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< 0 (+ .cse0 1)) (< 0 (+ c_~s~0 .cse0 2147483649 (select .cse1 .cse2))))))) (forall ((v_ArrVal_560 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_560) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse2))) (or (< 0 (+ c_~s~0 2147483650 .cse4)) (< 0 (+ c_~s~0 (select .cse5 .cse3) 2147483649 .cse4)))))))))) is different from false [2022-11-18 19:57:19,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:19,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 158 [2022-11-18 19:57:19,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:19,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 464 treesize of output 453 [2022-11-18 19:57:19,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:19,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 344 [2022-11-18 19:57:19,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:19,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 345 [2022-11-18 19:57:19,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:19,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 318 treesize of output 280 [2022-11-18 19:57:19,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:19,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 280 treesize of output 282 [2022-11-18 19:57:26,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:57:26,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:57:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:26,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546412701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:26,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:26,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 28] total 75 [2022-11-18 19:57:26,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331903258] [2022-11-18 19:57:26,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:26,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-18 19:57:26,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-18 19:57:26,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=5140, Unknown=6, NotChecked=146, Total=5700 [2022-11-18 19:57:26,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 153 [2022-11-18 19:57:26,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 543 transitions, 8046 flow. Second operand has 76 states, 76 states have (on average 73.38157894736842) internal successors, (5577), 76 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:26,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:57:26,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 153 [2022-11-18 19:57:26,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:57:36,339 INFO L130 PetriNetUnfolder]: 5108/14110 cut-off events. [2022-11-18 19:57:36,339 INFO L131 PetriNetUnfolder]: For 421243/429762 co-relation queries the response was YES. [2022-11-18 19:57:36,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106888 conditions, 14110 events. 5108/14110 cut-off events. For 421243/429762 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 146008 event pairs, 1397 based on Foata normal form. 1011/14745 useless extension candidates. Maximal degree in co-relation 106791. Up to 7214 conditions per place. [2022-11-18 19:57:36,662 INFO L137 encePairwiseOnDemand]: 113/153 looper letters, 392 selfloop transitions, 198 changer transitions 11/669 dead transitions. [2022-11-18 19:57:36,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 669 transitions, 11150 flow [2022-11-18 19:57:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 19:57:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-18 19:57:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3782 transitions. [2022-11-18 19:57:36,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4846853774189414 [2022-11-18 19:57:36,667 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3782 transitions. [2022-11-18 19:57:36,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3782 transitions. [2022-11-18 19:57:36,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:57:36,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3782 transitions. [2022-11-18 19:57:36,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 74.15686274509804) internal successors, (3782), 51 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:36,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 153.0) internal successors, (7956), 52 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:36,682 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 153.0) internal successors, (7956), 52 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:36,682 INFO L175 Difference]: Start difference. First operand has 440 places, 543 transitions, 8046 flow. Second operand 51 states and 3782 transitions. [2022-11-18 19:57:36,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 669 transitions, 11150 flow [2022-11-18 19:57:39,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 669 transitions, 10277 flow, removed 279 selfloop flow, removed 33 redundant places. [2022-11-18 19:57:39,100 INFO L231 Difference]: Finished difference. Result has 468 places, 590 transitions, 8860 flow [2022-11-18 19:57:39,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=7314, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8860, PETRI_PLACES=468, PETRI_TRANSITIONS=590} [2022-11-18 19:57:39,101 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 339 predicate places. [2022-11-18 19:57:39,101 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 590 transitions, 8860 flow [2022-11-18 19:57:39,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 73.38157894736842) internal successors, (5577), 76 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:39,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:57:39,101 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:39,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:39,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 19:57:39,302 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:57:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1597105124, now seen corresponding path program 2 times [2022-11-18 19:57:39,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:39,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221376846] [2022-11-18 19:57:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:39,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:40,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:40,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221376846] [2022-11-18 19:57:40,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221376846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:40,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129012200] [2022-11-18 19:57:40,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:40,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:40,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:40,216 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:40,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 19:57:40,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:57:40,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:57:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:41,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:57:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:42,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-18 19:57:42,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:57:42,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-18 19:57:43,271 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-18 19:57:43,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 18 [2022-11-18 19:57:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:43,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:47,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:47,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2022-11-18 19:57:47,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:47,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 282 treesize of output 296 [2022-11-18 19:57:47,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:47,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 228 treesize of output 222 [2022-11-18 19:57:47,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:57:47,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 126 [2022-11-18 19:57:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:53,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129012200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:53,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:53,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 26] total 71 [2022-11-18 19:57:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647002992] [2022-11-18 19:57:53,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:53,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-18 19:57:53,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:53,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-18 19:57:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=4736, Unknown=4, NotChecked=0, Total=5112 [2022-11-18 19:57:53,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 153 [2022-11-18 19:57:53,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 590 transitions, 8860 flow. Second operand has 72 states, 72 states have (on average 76.47222222222223) internal successors, (5506), 72 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:53,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:57:53,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 153 [2022-11-18 19:57:53,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:02,916 INFO L130 PetriNetUnfolder]: 5152/14569 cut-off events. [2022-11-18 19:58:02,916 INFO L131 PetriNetUnfolder]: For 499986/512148 co-relation queries the response was YES. [2022-11-18 19:58:03,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116808 conditions, 14569 events. 5152/14569 cut-off events. For 499986/512148 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 152687 event pairs, 1966 based on Foata normal form. 943/14900 useless extension candidates. Maximal degree in co-relation 116701. Up to 9509 conditions per place. [2022-11-18 19:58:03,127 INFO L137 encePairwiseOnDemand]: 118/153 looper letters, 487 selfloop transitions, 99 changer transitions 23/680 dead transitions. [2022-11-18 19:58:03,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 680 transitions, 11716 flow [2022-11-18 19:58:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 19:58:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-18 19:58:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3418 transitions. [2022-11-18 19:58:03,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5077243018419489 [2022-11-18 19:58:03,132 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3418 transitions. [2022-11-18 19:58:03,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3418 transitions. [2022-11-18 19:58:03,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:03,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3418 transitions. [2022-11-18 19:58:03,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 77.68181818181819) internal successors, (3418), 44 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:03,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 153.0) internal successors, (6885), 45 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:03,144 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 153.0) internal successors, (6885), 45 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:03,145 INFO L175 Difference]: Start difference. First operand has 468 places, 590 transitions, 8860 flow. Second operand 44 states and 3418 transitions. [2022-11-18 19:58:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 680 transitions, 11716 flow [2022-11-18 19:58:05,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 680 transitions, 11488 flow, removed 65 selfloop flow, removed 36 redundant places. [2022-11-18 19:58:05,631 INFO L231 Difference]: Finished difference. Result has 482 places, 636 transitions, 9989 flow [2022-11-18 19:58:05,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=8636, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9989, PETRI_PLACES=482, PETRI_TRANSITIONS=636} [2022-11-18 19:58:05,632 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 353 predicate places. [2022-11-18 19:58:05,633 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 636 transitions, 9989 flow [2022-11-18 19:58:05,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 76.47222222222223) internal successors, (5506), 72 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:05,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:05,634 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:05,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 19:58:05,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 19:58:05,834 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:58:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:05,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1817580402, now seen corresponding path program 3 times [2022-11-18 19:58:05,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:05,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638218062] [2022-11-18 19:58:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:05,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:07,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638218062] [2022-11-18 19:58:07,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638218062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:58:07,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831441067] [2022-11-18 19:58:07,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:58:07,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:58:07,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:58:07,128 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:58:07,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 19:58:07,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:58:07,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:58:07,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:58:07,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:58:07,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:58:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:58:07,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:58:07,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:58:07,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-11-18 19:58:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:58:07,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831441067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:58:07,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:58:07,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 28 [2022-11-18 19:58:07,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112414431] [2022-11-18 19:58:07,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:58:07,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 19:58:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:58:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 19:58:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2022-11-18 19:58:07,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 153 [2022-11-18 19:58:07,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 636 transitions, 9989 flow. Second operand has 29 states, 29 states have (on average 86.3103448275862) internal successors, (2503), 29 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:07,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:58:07,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 153 [2022-11-18 19:58:07,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:16,324 INFO L130 PetriNetUnfolder]: 5770/16521 cut-off events. [2022-11-18 19:58:16,324 INFO L131 PetriNetUnfolder]: For 632018/645471 co-relation queries the response was YES. [2022-11-18 19:58:16,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134823 conditions, 16521 events. 5770/16521 cut-off events. For 632018/645471 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 176654 event pairs, 488 based on Foata normal form. 3328/19554 useless extension candidates. Maximal degree in co-relation 134709. Up to 3760 conditions per place. [2022-11-18 19:58:16,587 INFO L137 encePairwiseOnDemand]: 130/153 looper letters, 391 selfloop transitions, 316 changer transitions 48/835 dead transitions. [2022-11-18 19:58:16,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 835 transitions, 15562 flow [2022-11-18 19:58:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 19:58:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 19:58:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3465 transitions. [2022-11-18 19:58:16,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5806938159879337 [2022-11-18 19:58:16,592 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3465 transitions. [2022-11-18 19:58:16,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3465 transitions. [2022-11-18 19:58:16,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:16,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3465 transitions. [2022-11-18 19:58:16,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.84615384615384) internal successors, (3465), 39 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:16,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 153.0) internal successors, (6120), 40 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:16,604 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 153.0) internal successors, (6120), 40 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:16,605 INFO L175 Difference]: Start difference. First operand has 482 places, 636 transitions, 9989 flow. Second operand 39 states and 3465 transitions. [2022-11-18 19:58:16,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 835 transitions, 15562 flow [2022-11-18 19:58:20,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 835 transitions, 14950 flow, removed 271 selfloop flow, removed 32 redundant places. [2022-11-18 19:58:20,266 INFO L231 Difference]: Finished difference. Result has 494 places, 664 transitions, 11256 flow [2022-11-18 19:58:20,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=9577, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11256, PETRI_PLACES=494, PETRI_TRANSITIONS=664} [2022-11-18 19:58:20,268 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 365 predicate places. [2022-11-18 19:58:20,268 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 664 transitions, 11256 flow [2022-11-18 19:58:20,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.3103448275862) internal successors, (2503), 29 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:20,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:20,269 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:20,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 19:58:20,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 19:58:20,469 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:58:20,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:20,470 INFO L85 PathProgramCache]: Analyzing trace with hash 303449282, now seen corresponding path program 4 times [2022-11-18 19:58:20,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:20,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553728362] [2022-11-18 19:58:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:20,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:23,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:23,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553728362] [2022-11-18 19:58:23,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553728362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:58:23,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622860994] [2022-11-18 19:58:23,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:58:23,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:58:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:58:23,121 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:58:23,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 19:58:23,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:58:23,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:58:23,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:58:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:58:24,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:58:25,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:58:25,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-18 19:58:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:58:25,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-18 19:58:26,266 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-18 19:58:26,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 18 [2022-11-18 19:58:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:26,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:58:30,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:58:30,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2022-11-18 19:58:30,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:58:30,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 189 [2022-11-18 19:58:30,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 71 [2022-11-18 19:58:30,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:58:30,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 73 [2022-11-18 19:58:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:35,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622860994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:58:35,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:58:35,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 78 [2022-11-18 19:58:35,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209603396] [2022-11-18 19:58:35,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:58:35,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-18 19:58:35,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:58:35,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-18 19:58:35,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=5683, Unknown=5, NotChecked=0, Total=6162 [2022-11-18 19:58:35,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 153 [2022-11-18 19:58:35,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 664 transitions, 11256 flow. Second operand has 79 states, 79 states have (on average 76.25316455696202) internal successors, (6024), 79 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:35,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:58:35,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 153 [2022-11-18 19:58:35,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:54,498 INFO L130 PetriNetUnfolder]: 5640/15884 cut-off events. [2022-11-18 19:58:54,498 INFO L131 PetriNetUnfolder]: For 661451/676344 co-relation queries the response was YES. [2022-11-18 19:58:54,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138273 conditions, 15884 events. 5640/15884 cut-off events. For 661451/676344 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 168384 event pairs, 2141 based on Foata normal form. 1142/16485 useless extension candidates. Maximal degree in co-relation 138152. Up to 10287 conditions per place. [2022-11-18 19:58:54,784 INFO L137 encePairwiseOnDemand]: 116/153 looper letters, 529 selfloop transitions, 115 changer transitions 0/715 dead transitions. [2022-11-18 19:58:54,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 715 transitions, 13486 flow [2022-11-18 19:58:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 19:58:54,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-18 19:58:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3838 transitions. [2022-11-18 19:58:54,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016993464052287 [2022-11-18 19:58:54,789 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3838 transitions. [2022-11-18 19:58:54,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3838 transitions. [2022-11-18 19:58:54,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:54,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3838 transitions. [2022-11-18 19:58:54,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 76.76) internal successors, (3838), 50 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:54,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 153.0) internal successors, (7803), 51 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:54,805 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 153.0) internal successors, (7803), 51 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:54,805 INFO L175 Difference]: Start difference. First operand has 494 places, 664 transitions, 11256 flow. Second operand 50 states and 3838 transitions. [2022-11-18 19:58:54,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 715 transitions, 13486 flow [2022-11-18 19:58:58,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 715 transitions, 12958 flow, removed 70 selfloop flow, removed 27 redundant places. [2022-11-18 19:58:58,824 INFO L231 Difference]: Finished difference. Result has 514 places, 697 transitions, 11810 flow [2022-11-18 19:58:58,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=10770, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=11810, PETRI_PLACES=514, PETRI_TRANSITIONS=697} [2022-11-18 19:58:58,826 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 385 predicate places. [2022-11-18 19:58:58,826 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 697 transitions, 11810 flow [2022-11-18 19:58:58,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 76.25316455696202) internal successors, (6024), 79 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:58,828 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:58,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 19:58:59,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 19:58:59,031 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:58:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:59,032 INFO L85 PathProgramCache]: Analyzing trace with hash -575394924, now seen corresponding path program 5 times [2022-11-18 19:58:59,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:59,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566793758] [2022-11-18 19:58:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:59,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:00,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566793758] [2022-11-18 19:59:00,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566793758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124643274] [2022-11-18 19:59:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:59:00,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:00,503 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:00,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ab6e31-9113-4676-bbca-c3cbfb3acee8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 19:59:00,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 19:59:00,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:00,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:59:00,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:00,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:59:00,738 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:59:00,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 19:59:01,373 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:59:01,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-18 19:59:01,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:59:03,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-18 19:59:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:03,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-18 19:59:04,446 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-18 19:59:04,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 18 [2022-11-18 19:59:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:04,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:06,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:06,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2022-11-18 19:59:06,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:06,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 229 [2022-11-18 19:59:06,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:06,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 149 [2022-11-18 19:59:06,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:06,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2022-11-18 19:59:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:16,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124643274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:16,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:59:16,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 27] total 74 [2022-11-18 19:59:16,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641633755] [2022-11-18 19:59:16,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:16,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-18 19:59:16,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:16,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-18 19:59:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=5118, Unknown=6, NotChecked=0, Total=5550 [2022-11-18 19:59:16,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 153 [2022-11-18 19:59:16,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 697 transitions, 11810 flow. Second operand has 75 states, 75 states have (on average 73.41333333333333) internal successors, (5506), 75 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:16,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:16,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 153 [2022-11-18 19:59:16,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:32,377 INFO L130 PetriNetUnfolder]: 6127/17111 cut-off events. [2022-11-18 19:59:32,377 INFO L131 PetriNetUnfolder]: For 710892/727005 co-relation queries the response was YES. [2022-11-18 19:59:32,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151124 conditions, 17111 events. 6127/17111 cut-off events. For 710892/727005 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 182244 event pairs, 1546 based on Foata normal form. 2026/18719 useless extension candidates. Maximal degree in co-relation 151000. Up to 9576 conditions per place. [2022-11-18 19:59:32,743 INFO L137 encePairwiseOnDemand]: 117/153 looper letters, 520 selfloop transitions, 288 changer transitions 0/876 dead transitions. [2022-11-18 19:59:32,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 876 transitions, 17941 flow [2022-11-18 19:59:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 19:59:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-18 19:59:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3413 transitions. [2022-11-18 19:59:32,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4849389030974709 [2022-11-18 19:59:32,750 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3413 transitions. [2022-11-18 19:59:32,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3413 transitions. [2022-11-18 19:59:32,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:32,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3413 transitions. [2022-11-18 19:59:32,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 74.19565217391305) internal successors, (3413), 46 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:32,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 153.0) internal successors, (7191), 47 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:32,770 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 153.0) internal successors, (7191), 47 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:32,770 INFO L175 Difference]: Start difference. First operand has 514 places, 697 transitions, 11810 flow. Second operand 46 states and 3413 transitions. [2022-11-18 19:59:32,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 876 transitions, 17941 flow