./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e3c959108026afa89c4d07543133cda81a16d409ef9b7609f190c1caa51d799 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:30:23,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:30:23,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:30:23,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:30:23,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:30:23,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:30:23,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:30:23,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:30:23,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:30:23,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:30:23,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:30:23,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:30:23,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:30:23,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:30:23,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:30:23,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:30:23,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:30:23,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:30:23,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:30:23,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:30:23,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:30:23,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:30:23,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:30:23,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:30:23,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:30:23,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:30:23,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:30:23,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:30:23,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:30:23,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:30:23,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:30:23,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:30:23,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:30:23,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:30:23,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:30:23,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:30:23,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:30:23,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:30:23,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:30:23,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:30:23,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:30:23,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 10:30:23,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:30:23,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:30:23,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:30:23,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:30:23,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:30:23,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:30:23,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:30:23,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:30:23,616 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:30:23,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:30:23,617 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:30:23,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:30:23,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:30:23,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:30:23,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:30:23,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:30:23,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:30:23,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:30:23,619 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 10:30:23,619 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:30:23,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:30:23,620 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:30:23,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:30:23,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:30:23,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:30:23,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:30:23,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:23,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:30:23,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:30:23,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:30:23,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:30:23,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:30:23,623 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:30:23,623 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:30:23,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:30:23,623 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_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3c959108026afa89c4d07543133cda81a16d409ef9b7609f190c1caa51d799 [2022-11-20 10:30:23,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:30:23,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:30:23,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:30:23,920 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:30:23,921 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:30:23,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2022-11-20 10:30:27,072 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:30:27,278 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:30:27,279 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2022-11-20 10:30:27,286 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/data/6d54066ce/219bd5d003cb49d6b31ad2ebba5fbaad/FLAGeed3f7a65 [2022-11-20 10:30:27,304 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/data/6d54066ce/219bd5d003cb49d6b31ad2ebba5fbaad [2022-11-20 10:30:27,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:30:27,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:30:27,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:27,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:30:27,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:30:27,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b176322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27, skipping insertion in model container [2022-11-20 10:30:27,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:30:27,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:30:27,604 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2410,2423] [2022-11-20 10:30:27,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:27,625 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:30:27,645 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2410,2423] [2022-11-20 10:30:27,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:27,660 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:30:27,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27 WrapperNode [2022-11-20 10:30:27,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:27,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:27,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:30:27,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:30:27,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,702 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-11-20 10:30:27,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:27,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:30:27,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:30:27,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:30:27,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:30:27,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:30:27,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:30:27,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:30:27,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (1/1) ... [2022-11-20 10:30:27,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:27,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:27,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:30:27,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:30:27,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:30:27,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:30:27,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:30:27,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:30:27,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:30:27,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:30:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:30:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:30:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:30:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:30:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:30:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:30:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:30:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:30:27,838 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:30:27,951 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:30:27,955 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:30:28,166 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:30:28,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:30:28,255 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:30:28,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:28 BoogieIcfgContainer [2022-11-20 10:30:28,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:30:28,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:30:28,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:30:28,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:30:28,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:30:27" (1/3) ... [2022-11-20 10:30:28,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370ddae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:28, skipping insertion in model container [2022-11-20 10:30:28,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:27" (2/3) ... [2022-11-20 10:30:28,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370ddae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:28, skipping insertion in model container [2022-11-20 10:30:28,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:28" (3/3) ... [2022-11-20 10:30:28,281 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2022-11-20 10:30:28,294 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:30:28,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:30:28,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-20 10:30:28,307 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:30:28,413 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:30:28,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 220 flow [2022-11-20 10:30:28,532 INFO L130 PetriNetUnfolder]: 11/100 cut-off events. [2022-11-20 10:30:28,532 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:30:28,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 11/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 141 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2022-11-20 10:30:28,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 102 transitions, 220 flow [2022-11-20 10:30:28,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 81 transitions, 171 flow [2022-11-20 10:30:28,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:30:28,560 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;@5d91f39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:30:28,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-20 10:30:28,573 INFO L130 PetriNetUnfolder]: 2/37 cut-off events. [2022-11-20 10:30:28,573 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:30:28,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:28,574 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] [2022-11-20 10:30:28,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash -754746104, now seen corresponding path program 1 times [2022-11-20 10:30:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:28,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403751329] [2022-11-20 10:30:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:29,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:29,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403751329] [2022-11-20 10:30:29,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403751329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:29,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:29,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:30:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701930827] [2022-11-20 10:30:29,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:29,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:30:29,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:29,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:30:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:29,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:29,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:29,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:29,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:29,221 INFO L130 PetriNetUnfolder]: 129/304 cut-off events. [2022-11-20 10:30:29,221 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-20 10:30:29,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 304 events. 129/304 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1298 event pairs, 24 based on Foata normal form. 28/199 useless extension candidates. Maximal degree in co-relation 401. Up to 169 conditions per place. [2022-11-20 10:30:29,231 INFO L137 encePairwiseOnDemand]: 87/102 looper letters, 17 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2022-11-20 10:30:29,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 229 flow [2022-11-20 10:30:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:30:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:30:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2022-11-20 10:30:29,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8954248366013072 [2022-11-20 10:30:29,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2022-11-20 10:30:29,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2022-11-20 10:30:29,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:29,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2022-11-20 10:30:29,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,275 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 171 flow. Second operand 3 states and 274 transitions. [2022-11-20 10:30:29,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 229 flow [2022-11-20 10:30:29,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 85 transitions, 221 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:30:29,288 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 209 flow [2022-11-20 10:30:29,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2022-11-20 10:30:29,298 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2022-11-20 10:30:29,298 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 209 flow [2022-11-20 10:30:29,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:29,299 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] [2022-11-20 10:30:29,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:30:29,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 104939503, now seen corresponding path program 1 times [2022-11-20 10:30:29,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:29,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911439136] [2022-11-20 10:30:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:29,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:29,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911439136] [2022-11-20 10:30:29,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911439136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:29,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:29,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:29,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578603469] [2022-11-20 10:30:29,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:29,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:30:29,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:30:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:29,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 102 [2022-11-20 10:30:29,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:29,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 102 [2022-11-20 10:30:29,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:29,691 INFO L130 PetriNetUnfolder]: 161/389 cut-off events. [2022-11-20 10:30:29,691 INFO L131 PetriNetUnfolder]: For 56/144 co-relation queries the response was YES. [2022-11-20 10:30:29,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 389 events. 161/389 cut-off events. For 56/144 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1835 event pairs, 30 based on Foata normal form. 5/243 useless extension candidates. Maximal degree in co-relation 577. Up to 173 conditions per place. [2022-11-20 10:30:29,702 INFO L137 encePairwiseOnDemand]: 96/102 looper letters, 29 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2022-11-20 10:30:29,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 314 flow [2022-11-20 10:30:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:30:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:30:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-20 10:30:29,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8496732026143791 [2022-11-20 10:30:29,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-20 10:30:29,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-20 10:30:29,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:29,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-20 10:30:29,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,717 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 209 flow. Second operand 3 states and 260 transitions. [2022-11-20 10:30:29,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 314 flow [2022-11-20 10:30:29,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 93 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:30:29,724 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 234 flow [2022-11-20 10:30:29,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2022-11-20 10:30:29,726 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2022-11-20 10:30:29,726 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 234 flow [2022-11-20 10:30:29,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:29,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:29,728 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:30:29,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:29,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash 104939537, now seen corresponding path program 1 times [2022-11-20 10:30:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:29,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334648493] [2022-11-20 10:30:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:29,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:29,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334648493] [2022-11-20 10:30:29,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334648493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:29,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934779760] [2022-11-20 10:30:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:29,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:29,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:29,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:30:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:30:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:30,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:30,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934779760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:30,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:30,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 10:30:30,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075315113] [2022-11-20 10:30:30,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:30:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:30:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:30:30,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:30,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:30,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:30,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:30,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:30,424 INFO L130 PetriNetUnfolder]: 219/659 cut-off events. [2022-11-20 10:30:30,424 INFO L131 PetriNetUnfolder]: For 126/175 co-relation queries the response was YES. [2022-11-20 10:30:30,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1225 conditions, 659 events. 219/659 cut-off events. For 126/175 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3562 event pairs, 2 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 701. Up to 213 conditions per place. [2022-11-20 10:30:30,434 INFO L137 encePairwiseOnDemand]: 89/102 looper letters, 21 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2022-11-20 10:30:30,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 391 flow [2022-11-20 10:30:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:30:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:30:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 530 transitions. [2022-11-20 10:30:30,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8660130718954249 [2022-11-20 10:30:30,437 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 530 transitions. [2022-11-20 10:30:30,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 530 transitions. [2022-11-20 10:30:30,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:30,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 530 transitions. [2022-11-20 10:30:30,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 88.33333333333333) internal successors, (530), 6 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:30,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 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) [2022-11-20 10:30:30,442 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 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) [2022-11-20 10:30:30,442 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 234 flow. Second operand 6 states and 530 transitions. [2022-11-20 10:30:30,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 391 flow [2022-11-20 10:30:30,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 105 transitions, 381 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:30:30,450 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 358 flow [2022-11-20 10:30:30,450 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2022-11-20 10:30:30,456 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2022-11-20 10:30:30,456 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 358 flow [2022-11-20 10:30:30,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:30,456 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:30,457 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] [2022-11-20 10:30:30,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:30,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:30,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1078330672, now seen corresponding path program 1 times [2022-11-20 10:30:30,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:30,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901547104] [2022-11-20 10:30:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:30,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:30,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:30,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901547104] [2022-11-20 10:30:30,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901547104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:30,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44666275] [2022-11-20 10:30:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:30,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:30,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:30,781 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:30,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:30:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:30:30,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:30,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:31,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44666275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:31,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:31,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-20 10:30:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711875467] [2022-11-20 10:30:31,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:31,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:30:31,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:30:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:30:31,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:31,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 358 flow. Second operand has 8 states, 8 states have (on average 81.5) internal successors, (652), 8 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:31,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:31,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:31,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:31,428 INFO L130 PetriNetUnfolder]: 521/1835 cut-off events. [2022-11-20 10:30:31,428 INFO L131 PetriNetUnfolder]: For 2314/2663 co-relation queries the response was YES. [2022-11-20 10:30:31,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 1835 events. 521/1835 cut-off events. For 2314/2663 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 14118 event pairs, 10 based on Foata normal form. 153/1661 useless extension candidates. Maximal degree in co-relation 2111. Up to 445 conditions per place. [2022-11-20 10:30:31,445 INFO L137 encePairwiseOnDemand]: 91/102 looper letters, 51 selfloop transitions, 41 changer transitions 0/157 dead transitions. [2022-11-20 10:30:31,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 157 transitions, 919 flow [2022-11-20 10:30:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:30:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 10:30:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 722 transitions. [2022-11-20 10:30:31,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8848039215686274 [2022-11-20 10:30:31,448 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 722 transitions. [2022-11-20 10:30:31,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 722 transitions. [2022-11-20 10:30:31,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:31,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 722 transitions. [2022-11-20 10:30:31,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.25) internal successors, (722), 8 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:31,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 102.0) internal successors, (918), 9 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) [2022-11-20 10:30:31,454 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 102.0) internal successors, (918), 9 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) [2022-11-20 10:30:31,455 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 358 flow. Second operand 8 states and 722 transitions. [2022-11-20 10:30:31,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 157 transitions, 919 flow [2022-11-20 10:30:31,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 157 transitions, 873 flow, removed 20 selfloop flow, removed 2 redundant places. [2022-11-20 10:30:31,461 INFO L231 Difference]: Finished difference. Result has 95 places, 135 transitions, 863 flow [2022-11-20 10:30:31,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=863, PETRI_PLACES=95, PETRI_TRANSITIONS=135} [2022-11-20 10:30:31,463 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 17 predicate places. [2022-11-20 10:30:31,463 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 135 transitions, 863 flow [2022-11-20 10:30:31,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 81.5) internal successors, (652), 8 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:31,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:31,464 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] [2022-11-20 10:30:31,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:31,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:31,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:31,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:31,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1781447959, now seen corresponding path program 1 times [2022-11-20 10:30:31,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:31,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975973443] [2022-11-20 10:30:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:31,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:31,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:31,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975973443] [2022-11-20 10:30:31,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975973443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:31,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:31,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418510200] [2022-11-20 10:30:31,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:31,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:30:31,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:30:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:31,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:31,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 135 transitions, 863 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:31,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:31,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:31,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:32,232 INFO L130 PetriNetUnfolder]: 751/2662 cut-off events. [2022-11-20 10:30:32,232 INFO L131 PetriNetUnfolder]: For 7322/7886 co-relation queries the response was YES. [2022-11-20 10:30:32,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6440 conditions, 2662 events. 751/2662 cut-off events. For 7322/7886 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 22710 event pairs, 18 based on Foata normal form. 109/2319 useless extension candidates. Maximal degree in co-relation 4821. Up to 525 conditions per place. [2022-11-20 10:30:32,261 INFO L137 encePairwiseOnDemand]: 91/102 looper letters, 79 selfloop transitions, 35 changer transitions 0/179 dead transitions. [2022-11-20 10:30:32,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 179 transitions, 1531 flow [2022-11-20 10:30:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:30:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:30:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2022-11-20 10:30:32,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8627450980392157 [2022-11-20 10:30:32,263 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2022-11-20 10:30:32,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2022-11-20 10:30:32,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:32,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2022-11-20 10:30:32,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:32,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:32,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:32,266 INFO L175 Difference]: Start difference. First operand has 95 places, 135 transitions, 863 flow. Second operand 4 states and 352 transitions. [2022-11-20 10:30:32,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 179 transitions, 1531 flow [2022-11-20 10:30:32,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 179 transitions, 1451 flow, removed 40 selfloop flow, removed 0 redundant places. [2022-11-20 10:30:32,285 INFO L231 Difference]: Finished difference. Result has 100 places, 161 transitions, 1303 flow [2022-11-20 10:30:32,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1303, PETRI_PLACES=100, PETRI_TRANSITIONS=161} [2022-11-20 10:30:32,287 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 22 predicate places. [2022-11-20 10:30:32,288 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 161 transitions, 1303 flow [2022-11-20 10:30:32,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:32,288 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:32,289 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:32,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:30:32,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 147883295, now seen corresponding path program 1 times [2022-11-20 10:30:32,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:32,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591215977] [2022-11-20 10:30:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:32,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:32,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:32,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591215977] [2022-11-20 10:30:32,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591215977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:32,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:32,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796050508] [2022-11-20 10:30:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:30:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:30:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:32,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 102 [2022-11-20 10:30:32,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 161 transitions, 1303 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:32,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:32,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 102 [2022-11-20 10:30:32,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:33,196 INFO L130 PetriNetUnfolder]: 1600/4633 cut-off events. [2022-11-20 10:30:33,196 INFO L131 PetriNetUnfolder]: For 17107/17447 co-relation queries the response was YES. [2022-11-20 10:30:33,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12268 conditions, 4633 events. 1600/4633 cut-off events. For 17107/17447 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 44105 event pairs, 178 based on Foata normal form. 78/3795 useless extension candidates. Maximal degree in co-relation 11208. Up to 1124 conditions per place. [2022-11-20 10:30:33,247 INFO L137 encePairwiseOnDemand]: 96/102 looper letters, 141 selfloop transitions, 5 changer transitions 0/210 dead transitions. [2022-11-20 10:30:33,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 210 transitions, 2181 flow [2022-11-20 10:30:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:30:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:30:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-11-20 10:30:33,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8464052287581699 [2022-11-20 10:30:33,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2022-11-20 10:30:33,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2022-11-20 10:30:33,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:33,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2022-11-20 10:30:33,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:33,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:33,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:33,253 INFO L175 Difference]: Start difference. First operand has 100 places, 161 transitions, 1303 flow. Second operand 3 states and 259 transitions. [2022-11-20 10:30:33,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 210 transitions, 2181 flow [2022-11-20 10:30:33,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 210 transitions, 2168 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-20 10:30:33,307 INFO L231 Difference]: Finished difference. Result has 103 places, 163 transitions, 1324 flow [2022-11-20 10:30:33,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1324, PETRI_PLACES=103, PETRI_TRANSITIONS=163} [2022-11-20 10:30:33,308 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 25 predicate places. [2022-11-20 10:30:33,309 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 163 transitions, 1324 flow [2022-11-20 10:30:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:33,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:33,309 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:33,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:30:33,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1483966816, now seen corresponding path program 1 times [2022-11-20 10:30:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230803340] [2022-11-20 10:30:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:33,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:33,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230803340] [2022-11-20 10:30:33,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230803340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:33,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022890048] [2022-11-20 10:30:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:33,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:33,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:33,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:33,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:30:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:33,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:33,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:30:33,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022890048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:33,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:30:33,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 10:30:33,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247361165] [2022-11-20 10:30:33,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:33,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:30:33,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:30:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:30:33,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:33,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 163 transitions, 1324 flow. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:33,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:33,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:33,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:34,339 INFO L130 PetriNetUnfolder]: 1199/4182 cut-off events. [2022-11-20 10:30:34,340 INFO L131 PetriNetUnfolder]: For 17511/18514 co-relation queries the response was YES. [2022-11-20 10:30:34,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11613 conditions, 4182 events. 1199/4182 cut-off events. For 17511/18514 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 39226 event pairs, 55 based on Foata normal form. 213/3830 useless extension candidates. Maximal degree in co-relation 6670. Up to 818 conditions per place. [2022-11-20 10:30:34,395 INFO L137 encePairwiseOnDemand]: 92/102 looper letters, 98 selfloop transitions, 74 changer transitions 0/239 dead transitions. [2022-11-20 10:30:34,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 239 transitions, 2636 flow [2022-11-20 10:30:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:30:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:30:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2022-11-20 10:30:34,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8774509803921569 [2022-11-20 10:30:34,398 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2022-11-20 10:30:34,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2022-11-20 10:30:34,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:34,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2022-11-20 10:30:34,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:34,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:34,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:34,401 INFO L175 Difference]: Start difference. First operand has 103 places, 163 transitions, 1324 flow. Second operand 4 states and 358 transitions. [2022-11-20 10:30:34,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 239 transitions, 2636 flow [2022-11-20 10:30:34,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 239 transitions, 2626 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:30:34,436 INFO L231 Difference]: Finished difference. Result has 106 places, 223 transitions, 2509 flow [2022-11-20 10:30:34,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2509, PETRI_PLACES=106, PETRI_TRANSITIONS=223} [2022-11-20 10:30:34,437 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 28 predicate places. [2022-11-20 10:30:34,438 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 223 transitions, 2509 flow [2022-11-20 10:30:34,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:34,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:34,438 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:34,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:34,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:34,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2124675729, now seen corresponding path program 1 times [2022-11-20 10:30:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:34,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725819333] [2022-11-20 10:30:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:34,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:34,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725819333] [2022-11-20 10:30:34,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725819333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912968824] [2022-11-20 10:30:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:34,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:34,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:34,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:34,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:30:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:34,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:34,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:30:34,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912968824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:34,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:30:34,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-20 10:30:34,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902966878] [2022-11-20 10:30:34,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:34,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:30:34,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:30:34,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:30:34,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:34,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 223 transitions, 2509 flow. Second operand has 5 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:34,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:34,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:34,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:36,110 INFO L130 PetriNetUnfolder]: 1714/6166 cut-off events. [2022-11-20 10:30:36,111 INFO L131 PetriNetUnfolder]: For 40758/42796 co-relation queries the response was YES. [2022-11-20 10:30:36,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17678 conditions, 6166 events. 1714/6166 cut-off events. For 40758/42796 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 62881 event pairs, 34 based on Foata normal form. 652/5914 useless extension candidates. Maximal degree in co-relation 15505. Up to 1190 conditions per place. [2022-11-20 10:30:36,198 INFO L137 encePairwiseOnDemand]: 91/102 looper letters, 89 selfloop transitions, 135 changer transitions 0/291 dead transitions. [2022-11-20 10:30:36,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 291 transitions, 3887 flow [2022-11-20 10:30:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:30:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:30:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 450 transitions. [2022-11-20 10:30:36,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8823529411764706 [2022-11-20 10:30:36,200 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 450 transitions. [2022-11-20 10:30:36,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 450 transitions. [2022-11-20 10:30:36,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:36,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 450 transitions. [2022-11-20 10:30:36,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:36,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 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) [2022-11-20 10:30:36,205 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 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) [2022-11-20 10:30:36,205 INFO L175 Difference]: Start difference. First operand has 106 places, 223 transitions, 2509 flow. Second operand 5 states and 450 transitions. [2022-11-20 10:30:36,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 291 transitions, 3887 flow [2022-11-20 10:30:36,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 291 transitions, 3751 flow, removed 68 selfloop flow, removed 0 redundant places. [2022-11-20 10:30:36,260 INFO L231 Difference]: Finished difference. Result has 113 places, 279 transitions, 3841 flow [2022-11-20 10:30:36,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3841, PETRI_PLACES=113, PETRI_TRANSITIONS=279} [2022-11-20 10:30:36,261 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 35 predicate places. [2022-11-20 10:30:36,261 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 279 transitions, 3841 flow [2022-11-20 10:30:36,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:36,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:36,262 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] [2022-11-20 10:30:36,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:36,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:30:36,468 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:36,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:36,468 INFO L85 PathProgramCache]: Analyzing trace with hash -517162754, now seen corresponding path program 1 times [2022-11-20 10:30:36,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:36,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839359362] [2022-11-20 10:30:36,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:36,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:36,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:36,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839359362] [2022-11-20 10:30:36,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839359362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:36,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203439118] [2022-11-20 10:30:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:36,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:36,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:36,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:30:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:36,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:36,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203439118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:36,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:36,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-20 10:30:36,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306492366] [2022-11-20 10:30:36,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:30:36,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:30:36,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:30:36,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:36,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 279 transitions, 3841 flow. Second operand has 9 states, 9 states have (on average 81.77777777777777) internal successors, (736), 9 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:36,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:36,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:36,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:41,015 INFO L130 PetriNetUnfolder]: 6181/21994 cut-off events. [2022-11-20 10:30:41,015 INFO L131 PetriNetUnfolder]: For 185771/189132 co-relation queries the response was YES. [2022-11-20 10:30:41,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70077 conditions, 21994 events. 6181/21994 cut-off events. For 185771/189132 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 247761 event pairs, 38 based on Foata normal form. 1398/20341 useless extension candidates. Maximal degree in co-relation 62695. Up to 4210 conditions per place. [2022-11-20 10:30:41,402 INFO L137 encePairwiseOnDemand]: 91/102 looper letters, 249 selfloop transitions, 487 changer transitions 0/803 dead transitions. [2022-11-20 10:30:41,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 803 transitions, 13954 flow [2022-11-20 10:30:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:30:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:30:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 812 transitions. [2022-11-20 10:30:41,408 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8845315904139434 [2022-11-20 10:30:41,408 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 812 transitions. [2022-11-20 10:30:41,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 812 transitions. [2022-11-20 10:30:41,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:41,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 812 transitions. [2022-11-20 10:30:41,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 90.22222222222223) internal successors, (812), 9 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:41,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 102.0) internal successors, (1020), 10 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:41,414 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 102.0) internal successors, (1020), 10 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:41,414 INFO L175 Difference]: Start difference. First operand has 113 places, 279 transitions, 3841 flow. Second operand 9 states and 812 transitions. [2022-11-20 10:30:41,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 803 transitions, 13954 flow [2022-11-20 10:30:41,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 803 transitions, 13446 flow, removed 254 selfloop flow, removed 0 redundant places. [2022-11-20 10:30:41,727 INFO L231 Difference]: Finished difference. Result has 127 places, 695 transitions, 12975 flow [2022-11-20 10:30:41,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12975, PETRI_PLACES=127, PETRI_TRANSITIONS=695} [2022-11-20 10:30:41,728 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 49 predicate places. [2022-11-20 10:30:41,729 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 695 transitions, 12975 flow [2022-11-20 10:30:41,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 81.77777777777777) internal successors, (736), 9 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:41,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:41,729 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] [2022-11-20 10:30:41,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:41,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:41,935 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash 756072459, now seen corresponding path program 1 times [2022-11-20 10:30:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6399819] [2022-11-20 10:30:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:42,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6399819] [2022-11-20 10:30:42,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6399819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:42,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832051687] [2022-11-20 10:30:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:42,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:42,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:42,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:42,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:30:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:42,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832051687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:42,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:42,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:30:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678786068] [2022-11-20 10:30:42,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:42,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:30:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:30:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:30:42,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:42,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 695 transitions, 12975 flow. Second operand has 11 states, 11 states have (on average 81.63636363636364) internal successors, (898), 11 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:42,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:42,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:42,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:54,439 INFO L130 PetriNetUnfolder]: 15953/60705 cut-off events. [2022-11-20 10:30:54,439 INFO L131 PetriNetUnfolder]: For 936218/941779 co-relation queries the response was YES. [2022-11-20 10:30:54,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194050 conditions, 60705 events. 15953/60705 cut-off events. For 936218/941779 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 836276 event pairs, 142 based on Foata normal form. 8449/60337 useless extension candidates. Maximal degree in co-relation 141065. Up to 9804 conditions per place. [2022-11-20 10:30:55,564 INFO L137 encePairwiseOnDemand]: 91/102 looper letters, 565 selfloop transitions, 1122 changer transitions 0/1754 dead transitions. [2022-11-20 10:30:55,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 1754 transitions, 36456 flow [2022-11-20 10:30:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:30:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 10:30:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 996 transitions. [2022-11-20 10:30:55,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8877005347593583 [2022-11-20 10:30:55,568 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 996 transitions. [2022-11-20 10:30:55,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 996 transitions. [2022-11-20 10:30:55,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:55,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 996 transitions. [2022-11-20 10:30:55,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 90.54545454545455) internal successors, (996), 11 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:55,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 102.0) internal successors, (1224), 12 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) [2022-11-20 10:30:55,576 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 102.0) internal successors, (1224), 12 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) [2022-11-20 10:30:55,576 INFO L175 Difference]: Start difference. First operand has 127 places, 695 transitions, 12975 flow. Second operand 11 states and 996 transitions. [2022-11-20 10:30:55,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 1754 transitions, 36456 flow [2022-11-20 10:30:56,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 1754 transitions, 33816 flow, removed 1182 selfloop flow, removed 2 redundant places. [2022-11-20 10:30:56,590 INFO L231 Difference]: Finished difference. Result has 143 places, 1710 transitions, 37230 flow [2022-11-20 10:30:56,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=12165, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=37230, PETRI_PLACES=143, PETRI_TRANSITIONS=1710} [2022-11-20 10:30:56,591 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 65 predicate places. [2022-11-20 10:30:56,591 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 1710 transitions, 37230 flow [2022-11-20 10:30:56,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.63636363636364) internal successors, (898), 11 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:56,592 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:56,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:56,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:30:56,797 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:30:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:56,798 INFO L85 PathProgramCache]: Analyzing trace with hash -137224160, now seen corresponding path program 1 times [2022-11-20 10:30:56,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:56,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418894061] [2022-11-20 10:30:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:56,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:56,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:56,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418894061] [2022-11-20 10:30:56,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418894061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:56,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744572663] [2022-11-20 10:30:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:56,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:56,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:56,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:56,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a127c1-7926-4749-bda8-aa22ebdd6fd6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:30:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:30:57,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:57,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:57,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744572663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:57,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:57,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-20 10:30:57,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730658456] [2022-11-20 10:30:57,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:57,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:30:57,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:57,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:30:57,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=93, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:30:57,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 102 [2022-11-20 10:30:57,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 1710 transitions, 37230 flow. Second operand has 14 states, 14 states have (on average 81.5) internal successors, (1141), 14 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:57,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 102 [2022-11-20 10:30:57,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand