./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/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_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/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_aabc5e43-5f81-4705-a191-b0ee724ef0e0/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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:10:20,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:10:20,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:10:20,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:10:20,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:10:20,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:10:20,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:10:20,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:10:20,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:10:20,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:10:20,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:10:20,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:10:20,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:10:20,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:10:20,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:10:20,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:10:20,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:10:20,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:10:20,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:10:20,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:10:20,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:10:20,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:10:20,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:10:20,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:10:20,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:10:20,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:10:20,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:10:20,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:10:20,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:10:20,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:10:20,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:10:20,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:10:20,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:10:20,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:10:20,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:10:20,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:10:20,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:10:20,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:10:20,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:10:20,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:10:20,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:10:20,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 11:10:20,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:10:20,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:10:20,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:10:20,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:10:20,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:10:20,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:10:20,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:10:20,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:10:20,562 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:10:20,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:10:20,562 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:10:20,563 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:10:20,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:10:20,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:10:20,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:10:20,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:10:20,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:10:20,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:10:20,564 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 11:10:20,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:10:20,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:10:20,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:10:20,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:10:20,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:10:20,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:10:20,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:10:20,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:10:20,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:10:20,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:10:20,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:10:20,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:10:20,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:10:20,567 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:10:20,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:10:20,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:10:20,568 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_aabc5e43-5f81-4705-a191-b0ee724ef0e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-11-20 11:10:20,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:10:20,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:10:20,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:10:20,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:10:20,825 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:10:20,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-20 11:10:23,935 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:10:24,175 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:10:24,176 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-20 11:10:24,184 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/data/f66739783/f47341b2d2e84dcdbe406d3338dc0a06/FLAG40d4b2062 [2022-11-20 11:10:24,199 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/data/f66739783/f47341b2d2e84dcdbe406d3338dc0a06 [2022-11-20 11:10:24,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:10:24,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:10:24,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:10:24,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:10:24,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:10:24,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@197b54b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24, skipping insertion in model container [2022-11-20 11:10:24,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:10:24,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:10:24,431 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_aabc5e43-5f81-4705-a191-b0ee724ef0e0/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-20 11:10:24,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:10:24,447 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:10:24,471 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_aabc5e43-5f81-4705-a191-b0ee724ef0e0/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-20 11:10:24,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:10:24,492 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:10:24,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24 WrapperNode [2022-11-20 11:10:24,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:10:24,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:10:24,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:10:24,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:10:24,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,553 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2022-11-20 11:10:24,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:10:24,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:10:24,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:10:24,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:10:24,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:10:24,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:10:24,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:10:24,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:10:24,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (1/1) ... [2022-11-20 11:10:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:10:24,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:24,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:10:24,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:10:24,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:10:24,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:10:24,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:10:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:10:24,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:10:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:10:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:10:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:10:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:10:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:10:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:10:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:10:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:10:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:10:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:10:24,719 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:10:24,828 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:10:24,829 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:10:25,155 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:10:25,398 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:10:25,398 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:10:25,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:10:25 BoogieIcfgContainer [2022-11-20 11:10:25,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:10:25,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:10:25,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:10:25,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:10:25,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:10:24" (1/3) ... [2022-11-20 11:10:25,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1899b53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:10:25, skipping insertion in model container [2022-11-20 11:10:25,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:24" (2/3) ... [2022-11-20 11:10:25,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1899b53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:10:25, skipping insertion in model container [2022-11-20 11:10:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:10:25" (3/3) ... [2022-11-20 11:10:25,413 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-11-20 11:10:25,423 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:10:25,435 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:10:25,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-20 11:10:25,436 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:10:25,577 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:10:25,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2022-11-20 11:10:25,701 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2022-11-20 11:10:25,701 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:10:25,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 128 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-11-20 11:10:25,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2022-11-20 11:10:25,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 123 transitions, 255 flow [2022-11-20 11:10:25,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:10:25,732 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;@432e53f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:10:25,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-20 11:10:25,753 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-11-20 11:10:25,753 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:10:25,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:25,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:25,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:25,761 INFO L85 PathProgramCache]: Analyzing trace with hash 45377837, now seen corresponding path program 1 times [2022-11-20 11:10:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:25,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184151903] [2022-11-20 11:10:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:25,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:26,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:26,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184151903] [2022-11-20 11:10:26,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184151903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:26,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:26,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:10:26,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827387526] [2022-11-20 11:10:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:26,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:10:26,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:10:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:10:26,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-20 11:10:26,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:26,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:26,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-20 11:10:26,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:26,640 INFO L130 PetriNetUnfolder]: 73/312 cut-off events. [2022-11-20 11:10:26,641 INFO L131 PetriNetUnfolder]: For 52/58 co-relation queries the response was YES. [2022-11-20 11:10:26,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 312 events. 73/312 cut-off events. For 52/58 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1152 event pairs, 46 based on Foata normal form. 28/222 useless extension candidates. Maximal degree in co-relation 164. Up to 82 conditions per place. [2022-11-20 11:10:26,646 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 42 selfloop transitions, 4 changer transitions 2/137 dead transitions. [2022-11-20 11:10:26,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 137 transitions, 384 flow [2022-11-20 11:10:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:10:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:10:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-11-20 11:10:26,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8402777777777778 [2022-11-20 11:10:26,669 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-11-20 11:10:26,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-11-20 11:10:26,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:26,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-11-20 11:10:26,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:26,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:26,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:26,695 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 255 flow. Second operand 5 states and 605 transitions. [2022-11-20 11:10:26,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 137 transitions, 384 flow [2022-11-20 11:10:26,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 137 transitions, 374 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 11:10:26,712 INFO L231 Difference]: Finished difference. Result has 123 places, 117 transitions, 262 flow [2022-11-20 11:10:26,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2022-11-20 11:10:26,721 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 3 predicate places. [2022-11-20 11:10:26,722 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 262 flow [2022-11-20 11:10:26,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:26,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:26,723 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:10:26,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash -696994827, now seen corresponding path program 1 times [2022-11-20 11:10:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:26,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327761506] [2022-11-20 11:10:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:26,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:27,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:27,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327761506] [2022-11-20 11:10:27,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327761506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:27,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:27,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:10:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714502406] [2022-11-20 11:10:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:10:27,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:10:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:10:27,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 144 [2022-11-20 11:10:27,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:27,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:27,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 144 [2022-11-20 11:10:27,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:27,327 INFO L130 PetriNetUnfolder]: 77/382 cut-off events. [2022-11-20 11:10:27,328 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-20 11:10:27,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 382 events. 77/382 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1584 event pairs, 28 based on Foata normal form. 14/276 useless extension candidates. Maximal degree in co-relation 302. Up to 102 conditions per place. [2022-11-20 11:10:27,331 INFO L137 encePairwiseOnDemand]: 133/144 looper letters, 22 selfloop transitions, 7 changer transitions 0/125 dead transitions. [2022-11-20 11:10:27,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 125 transitions, 337 flow [2022-11-20 11:10:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:10:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:10:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2022-11-20 11:10:27,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2022-11-20 11:10:27,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2022-11-20 11:10:27,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2022-11-20 11:10:27,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:27,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2022-11-20 11:10:27,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:27,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:27,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:27,337 INFO L175 Difference]: Start difference. First operand has 123 places, 117 transitions, 262 flow. Second operand 3 states and 372 transitions. [2022-11-20 11:10:27,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 125 transitions, 337 flow [2022-11-20 11:10:27,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 125 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:10:27,341 INFO L231 Difference]: Finished difference. Result has 124 places, 121 transitions, 312 flow [2022-11-20 11:10:27,341 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2022-11-20 11:10:27,342 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 4 predicate places. [2022-11-20 11:10:27,343 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 312 flow [2022-11-20 11:10:27,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:27,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:27,344 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:27,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:10:27,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash -778668931, now seen corresponding path program 1 times [2022-11-20 11:10:27,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:27,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393259680] [2022-11-20 11:10:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:27,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393259680] [2022-11-20 11:10:27,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393259680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755054497] [2022-11-20 11:10:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:27,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:27,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:27,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:27,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:10:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:10:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:27,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:27,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755054497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:27,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:27,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 11:10:27,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388341713] [2022-11-20 11:10:27,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:27,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:10:27,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:27,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:10:27,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:10:27,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-20 11:10:27,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 312 flow. Second operand has 12 states, 12 states have (on average 111.66666666666667) internal successors, (1340), 12 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:27,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:27,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-20 11:10:27,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:28,328 INFO L130 PetriNetUnfolder]: 161/772 cut-off events. [2022-11-20 11:10:28,328 INFO L131 PetriNetUnfolder]: For 342/642 co-relation queries the response was YES. [2022-11-20 11:10:28,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 772 events. 161/772 cut-off events. For 342/642 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4151 event pairs, 65 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 568. Up to 132 conditions per place. [2022-11-20 11:10:28,337 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 113 selfloop transitions, 18 changer transitions 0/220 dead transitions. [2022-11-20 11:10:28,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 220 transitions, 938 flow [2022-11-20 11:10:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:10:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:10:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2076 transitions. [2022-11-20 11:10:28,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8009259259259259 [2022-11-20 11:10:28,344 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2076 transitions. [2022-11-20 11:10:28,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2076 transitions. [2022-11-20 11:10:28,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:28,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2076 transitions. [2022-11-20 11:10:28,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.33333333333333) internal successors, (2076), 18 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:28,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:28,404 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:28,404 INFO L175 Difference]: Start difference. First operand has 124 places, 121 transitions, 312 flow. Second operand 18 states and 2076 transitions. [2022-11-20 11:10:28,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 220 transitions, 938 flow [2022-11-20 11:10:28,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 220 transitions, 892 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:10:28,411 INFO L231 Difference]: Finished difference. Result has 143 places, 133 transitions, 404 flow [2022-11-20 11:10:28,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=404, PETRI_PLACES=143, PETRI_TRANSITIONS=133} [2022-11-20 11:10:28,413 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 23 predicate places. [2022-11-20 11:10:28,413 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 133 transitions, 404 flow [2022-11-20 11:10:28,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.66666666666667) internal successors, (1340), 12 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:28,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:28,414 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:28,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:28,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:28,620 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1631067334, now seen corresponding path program 1 times [2022-11-20 11:10:28,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:28,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061613039] [2022-11-20 11:10:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:28,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:28,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061613039] [2022-11-20 11:10:28,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061613039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:28,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085924270] [2022-11-20 11:10:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:28,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:28,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:28,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:28,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:10:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:10:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:28,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:10:28,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085924270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:28,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:10:28,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:10:28,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139307427] [2022-11-20 11:10:28,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:28,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:10:28,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:28,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:10:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:10:28,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-20 11:10:28,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 133 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:28,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:28,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-20 11:10:28,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:29,234 INFO L130 PetriNetUnfolder]: 161/768 cut-off events. [2022-11-20 11:10:29,235 INFO L131 PetriNetUnfolder]: For 167/317 co-relation queries the response was YES. [2022-11-20 11:10:29,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 768 events. 161/768 cut-off events. For 167/317 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4119 event pairs, 65 based on Foata normal form. 4/517 useless extension candidates. Maximal degree in co-relation 1107. Up to 272 conditions per place. [2022-11-20 11:10:29,242 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 51 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2022-11-20 11:10:29,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 151 transitions, 575 flow [2022-11-20 11:10:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:10:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:10:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 809 transitions. [2022-11-20 11:10:29,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025793650793651 [2022-11-20 11:10:29,245 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 809 transitions. [2022-11-20 11:10:29,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 809 transitions. [2022-11-20 11:10:29,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:29,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 809 transitions. [2022-11-20 11:10:29,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:29,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:29,253 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:29,253 INFO L175 Difference]: Start difference. First operand has 143 places, 133 transitions, 404 flow. Second operand 7 states and 809 transitions. [2022-11-20 11:10:29,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 151 transitions, 575 flow [2022-11-20 11:10:29,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 151 transitions, 543 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 11:10:29,262 INFO L231 Difference]: Finished difference. Result has 139 places, 129 transitions, 367 flow [2022-11-20 11:10:29,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=367, PETRI_PLACES=139, PETRI_TRANSITIONS=129} [2022-11-20 11:10:29,265 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 19 predicate places. [2022-11-20 11:10:29,265 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 129 transitions, 367 flow [2022-11-20 11:10:29,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:29,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:29,266 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:29,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:29,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:29,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash 62535906, now seen corresponding path program 1 times [2022-11-20 11:10:29,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:29,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609873354] [2022-11-20 11:10:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:29,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:29,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609873354] [2022-11-20 11:10:29,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609873354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:29,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:29,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:10:29,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497541116] [2022-11-20 11:10:29,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:10:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:10:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:10:29,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 144 [2022-11-20 11:10:29,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 129 transitions, 367 flow. Second operand has 9 states, 9 states have (on average 102.11111111111111) internal successors, (919), 9 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:29,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:29,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 144 [2022-11-20 11:10:29,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:30,470 INFO L130 PetriNetUnfolder]: 309/1090 cut-off events. [2022-11-20 11:10:30,470 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-20 11:10:30,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 1090 events. 309/1090 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6830 event pairs, 138 based on Foata normal form. 4/798 useless extension candidates. Maximal degree in co-relation 1694. Up to 399 conditions per place. [2022-11-20 11:10:30,480 INFO L137 encePairwiseOnDemand]: 127/144 looper letters, 55 selfloop transitions, 19 changer transitions 4/161 dead transitions. [2022-11-20 11:10:30,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 161 transitions, 613 flow [2022-11-20 11:10:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:10:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 11:10:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1174 transitions. [2022-11-20 11:10:30,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7411616161616161 [2022-11-20 11:10:30,484 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1174 transitions. [2022-11-20 11:10:30,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1174 transitions. [2022-11-20 11:10:30,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:30,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1174 transitions. [2022-11-20 11:10:30,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.72727272727273) internal successors, (1174), 11 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,494 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,494 INFO L175 Difference]: Start difference. First operand has 139 places, 129 transitions, 367 flow. Second operand 11 states and 1174 transitions. [2022-11-20 11:10:30,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 161 transitions, 613 flow [2022-11-20 11:10:30,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 161 transitions, 599 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:10:30,501 INFO L231 Difference]: Finished difference. Result has 150 places, 137 transitions, 456 flow [2022-11-20 11:10:30,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=456, PETRI_PLACES=150, PETRI_TRANSITIONS=137} [2022-11-20 11:10:30,504 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 30 predicate places. [2022-11-20 11:10:30,505 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 137 transitions, 456 flow [2022-11-20 11:10:30,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.11111111111111) internal successors, (919), 9 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:30,506 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:30,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:10:30,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:30,507 INFO L85 PathProgramCache]: Analyzing trace with hash 62535907, now seen corresponding path program 1 times [2022-11-20 11:10:30,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:30,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363523904] [2022-11-20 11:10:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:30,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363523904] [2022-11-20 11:10:30,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363523904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:30,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:30,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:10:30,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478821029] [2022-11-20 11:10:30,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:30,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:10:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:30,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:10:30,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:10:30,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 144 [2022-11-20 11:10:30,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 137 transitions, 456 flow. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:30,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 144 [2022-11-20 11:10:30,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:30,863 INFO L130 PetriNetUnfolder]: 159/728 cut-off events. [2022-11-20 11:10:30,863 INFO L131 PetriNetUnfolder]: For 703/945 co-relation queries the response was YES. [2022-11-20 11:10:30,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 728 events. 159/728 cut-off events. For 703/945 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3615 event pairs, 78 based on Foata normal form. 42/610 useless extension candidates. Maximal degree in co-relation 1135. Up to 303 conditions per place. [2022-11-20 11:10:30,869 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 20 selfloop transitions, 4 changer transitions 0/131 dead transitions. [2022-11-20 11:10:30,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 131 transitions, 462 flow [2022-11-20 11:10:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:10:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:10:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2022-11-20 11:10:30,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8138888888888889 [2022-11-20 11:10:30,875 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2022-11-20 11:10:30,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2022-11-20 11:10:30,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:30,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2022-11-20 11:10:30,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,881 INFO L175 Difference]: Start difference. First operand has 150 places, 137 transitions, 456 flow. Second operand 5 states and 586 transitions. [2022-11-20 11:10:30,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 131 transitions, 462 flow [2022-11-20 11:10:30,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 131 transitions, 448 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 11:10:30,886 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 408 flow [2022-11-20 11:10:30,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=408, PETRI_PLACES=148, PETRI_TRANSITIONS=131} [2022-11-20 11:10:30,890 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 28 predicate places. [2022-11-20 11:10:30,890 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 408 flow [2022-11-20 11:10:30,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:30,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:30,892 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:10:30,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1008127265, now seen corresponding path program 1 times [2022-11-20 11:10:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:30,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196127461] [2022-11-20 11:10:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:30,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:30,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196127461] [2022-11-20 11:10:30,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196127461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:30,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:30,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:10:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300949764] [2022-11-20 11:10:30,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:10:31,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:10:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:10:31,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-11-20 11:10:31,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 131 transitions, 408 flow. Second operand has 4 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:31,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:31,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-11-20 11:10:31,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:31,277 INFO L130 PetriNetUnfolder]: 264/1153 cut-off events. [2022-11-20 11:10:31,277 INFO L131 PetriNetUnfolder]: For 418/600 co-relation queries the response was YES. [2022-11-20 11:10:31,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2292 conditions, 1153 events. 264/1153 cut-off events. For 418/600 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7056 event pairs, 103 based on Foata normal form. 2/885 useless extension candidates. Maximal degree in co-relation 2240. Up to 262 conditions per place. [2022-11-20 11:10:31,287 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 20 selfloop transitions, 10 changer transitions 0/140 dead transitions. [2022-11-20 11:10:31,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 140 transitions, 503 flow [2022-11-20 11:10:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:10:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:10:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2022-11-20 11:10:31,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8416666666666667 [2022-11-20 11:10:31,290 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2022-11-20 11:10:31,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2022-11-20 11:10:31,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:31,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2022-11-20 11:10:31,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:31,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:31,296 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:31,296 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 408 flow. Second operand 5 states and 606 transitions. [2022-11-20 11:10:31,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 140 transitions, 503 flow [2022-11-20 11:10:31,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 140 transitions, 495 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:10:31,302 INFO L231 Difference]: Finished difference. Result has 150 places, 134 transitions, 455 flow [2022-11-20 11:10:31,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=455, PETRI_PLACES=150, PETRI_TRANSITIONS=134} [2022-11-20 11:10:31,303 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 30 predicate places. [2022-11-20 11:10:31,303 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 134 transitions, 455 flow [2022-11-20 11:10:31,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:31,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:31,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:31,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:10:31,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:31,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1008127267, now seen corresponding path program 1 times [2022-11-20 11:10:31,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:31,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942473855] [2022-11-20 11:10:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:31,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942473855] [2022-11-20 11:10:31,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942473855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:31,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:31,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:10:31,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842667523] [2022-11-20 11:10:31,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:31,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:31,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:31,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:31,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:31,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 144 [2022-11-20 11:10:31,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 134 transitions, 455 flow. Second operand has 10 states, 10 states have (on average 100.2) internal successors, (1002), 10 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:31,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:31,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 144 [2022-11-20 11:10:31,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:32,440 INFO L130 PetriNetUnfolder]: 531/1947 cut-off events. [2022-11-20 11:10:32,440 INFO L131 PetriNetUnfolder]: For 1476/1476 co-relation queries the response was YES. [2022-11-20 11:10:32,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4401 conditions, 1947 events. 531/1947 cut-off events. For 1476/1476 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 14132 event pairs, 208 based on Foata normal form. 16/1711 useless extension candidates. Maximal degree in co-relation 4080. Up to 681 conditions per place. [2022-11-20 11:10:32,457 INFO L137 encePairwiseOnDemand]: 132/144 looper letters, 73 selfloop transitions, 10 changer transitions 1/165 dead transitions. [2022-11-20 11:10:32,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 165 transitions, 743 flow [2022-11-20 11:10:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:10:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:10:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1054 transitions. [2022-11-20 11:10:32,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7319444444444444 [2022-11-20 11:10:32,462 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1054 transitions. [2022-11-20 11:10:32,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1054 transitions. [2022-11-20 11:10:32,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:32,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1054 transitions. [2022-11-20 11:10:32,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:32,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 144.0) internal successors, (1584), 11 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:32,469 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 144.0) internal successors, (1584), 11 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:32,469 INFO L175 Difference]: Start difference. First operand has 150 places, 134 transitions, 455 flow. Second operand 10 states and 1054 transitions. [2022-11-20 11:10:32,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 165 transitions, 743 flow [2022-11-20 11:10:32,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 165 transitions, 738 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:10:32,480 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 491 flow [2022-11-20 11:10:32,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=491, PETRI_PLACES=159, PETRI_TRANSITIONS=135} [2022-11-20 11:10:32,483 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 39 predicate places. [2022-11-20 11:10:32,483 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 491 flow [2022-11-20 11:10:32,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.2) internal successors, (1002), 10 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:32,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:32,484 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:32,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:10:32,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2129092498, now seen corresponding path program 1 times [2022-11-20 11:10:32,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:32,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070447404] [2022-11-20 11:10:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:32,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:32,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:32,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070447404] [2022-11-20 11:10:32,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070447404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:32,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655676497] [2022-11-20 11:10:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:32,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:32,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:32,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:32,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:10:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:32,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:10:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:33,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:10:33,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655676497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:33,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:10:33,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-20 11:10:33,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079545282] [2022-11-20 11:10:33,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:33,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:10:33,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:33,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:10:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:10:33,196 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 144 [2022-11-20 11:10:33,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 135 transitions, 491 flow. Second operand has 7 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:33,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:33,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 144 [2022-11-20 11:10:33,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:33,659 INFO L130 PetriNetUnfolder]: 385/1323 cut-off events. [2022-11-20 11:10:33,659 INFO L131 PetriNetUnfolder]: For 1644/1644 co-relation queries the response was YES. [2022-11-20 11:10:33,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3294 conditions, 1323 events. 385/1323 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8516 event pairs, 17 based on Foata normal form. 116/1260 useless extension candidates. Maximal degree in co-relation 3157. Up to 338 conditions per place. [2022-11-20 11:10:33,672 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 27 selfloop transitions, 14 changer transitions 12/150 dead transitions. [2022-11-20 11:10:33,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 150 transitions, 709 flow [2022-11-20 11:10:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:10:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:10:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1011 transitions. [2022-11-20 11:10:33,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7800925925925926 [2022-11-20 11:10:33,675 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1011 transitions. [2022-11-20 11:10:33,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1011 transitions. [2022-11-20 11:10:33,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:33,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1011 transitions. [2022-11-20 11:10:33,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:33,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:33,682 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:33,682 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 491 flow. Second operand 9 states and 1011 transitions. [2022-11-20 11:10:33,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 150 transitions, 709 flow [2022-11-20 11:10:33,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 686 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-20 11:10:33,690 INFO L231 Difference]: Finished difference. Result has 156 places, 123 transitions, 435 flow [2022-11-20 11:10:33,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=435, PETRI_PLACES=156, PETRI_TRANSITIONS=123} [2022-11-20 11:10:33,691 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 36 predicate places. [2022-11-20 11:10:33,692 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 123 transitions, 435 flow [2022-11-20 11:10:33,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:33,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:33,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:33,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:33,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:33,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:33,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2028117293, now seen corresponding path program 1 times [2022-11-20 11:10:33,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:33,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771769082] [2022-11-20 11:10:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:33,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:34,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771769082] [2022-11-20 11:10:34,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771769082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:34,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:34,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:10:34,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915065230] [2022-11-20 11:10:34,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:34,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:10:34,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:10:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:10:34,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 144 [2022-11-20 11:10:34,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 123 transitions, 435 flow. Second operand has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:34,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 144 [2022-11-20 11:10:34,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:34,430 INFO L130 PetriNetUnfolder]: 341/1221 cut-off events. [2022-11-20 11:10:34,430 INFO L131 PetriNetUnfolder]: For 2160/2448 co-relation queries the response was YES. [2022-11-20 11:10:34,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3242 conditions, 1221 events. 341/1221 cut-off events. For 2160/2448 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6729 event pairs, 68 based on Foata normal form. 16/973 useless extension candidates. Maximal degree in co-relation 3132. Up to 338 conditions per place. [2022-11-20 11:10:34,444 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 34 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2022-11-20 11:10:34,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 136 transitions, 593 flow [2022-11-20 11:10:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:10:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:10:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2022-11-20 11:10:34,447 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7833333333333333 [2022-11-20 11:10:34,447 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2022-11-20 11:10:34,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2022-11-20 11:10:34,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:34,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2022-11-20 11:10:34,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,451 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,451 INFO L175 Difference]: Start difference. First operand has 156 places, 123 transitions, 435 flow. Second operand 5 states and 564 transitions. [2022-11-20 11:10:34,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 136 transitions, 593 flow [2022-11-20 11:10:34,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 136 transitions, 525 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-20 11:10:34,458 INFO L231 Difference]: Finished difference. Result has 140 places, 124 transitions, 419 flow [2022-11-20 11:10:34,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=140, PETRI_TRANSITIONS=124} [2022-11-20 11:10:34,459 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 20 predicate places. [2022-11-20 11:10:34,460 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 124 transitions, 419 flow [2022-11-20 11:10:34,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,460 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:34,460 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:34,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:10:34,461 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:34,461 INFO L85 PathProgramCache]: Analyzing trace with hash -280902964, now seen corresponding path program 1 times [2022-11-20 11:10:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:34,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804808301] [2022-11-20 11:10:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:34,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:34,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:34,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804808301] [2022-11-20 11:10:34,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804808301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:34,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:34,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:10:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027438966] [2022-11-20 11:10:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:34,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:10:34,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:10:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:10:34,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2022-11-20 11:10:34,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 124 transitions, 419 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:34,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2022-11-20 11:10:34,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:34,710 INFO L130 PetriNetUnfolder]: 161/845 cut-off events. [2022-11-20 11:10:34,711 INFO L131 PetriNetUnfolder]: For 663/663 co-relation queries the response was YES. [2022-11-20 11:10:34,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1769 conditions, 845 events. 161/845 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4055 event pairs, 48 based on Foata normal form. 0/737 useless extension candidates. Maximal degree in co-relation 1676. Up to 277 conditions per place. [2022-11-20 11:10:34,717 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 20 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-11-20 11:10:34,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 128 transitions, 475 flow [2022-11-20 11:10:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:10:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:10:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-11-20 11:10:34,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8541666666666666 [2022-11-20 11:10:34,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-11-20 11:10:34,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-11-20 11:10:34,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:34,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-11-20 11:10:34,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,722 INFO L175 Difference]: Start difference. First operand has 140 places, 124 transitions, 419 flow. Second operand 3 states and 369 transitions. [2022-11-20 11:10:34,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 128 transitions, 475 flow [2022-11-20 11:10:34,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 128 transitions, 463 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:10:34,726 INFO L231 Difference]: Finished difference. Result has 139 places, 123 transitions, 398 flow [2022-11-20 11:10:34,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=139, PETRI_TRANSITIONS=123} [2022-11-20 11:10:34,727 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 19 predicate places. [2022-11-20 11:10:34,727 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 123 transitions, 398 flow [2022-11-20 11:10:34,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:34,728 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:34,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:10:34,729 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2112266963, now seen corresponding path program 2 times [2022-11-20 11:10:34,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:34,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826816457] [2022-11-20 11:10:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:34,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:34,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:34,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826816457] [2022-11-20 11:10:34,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826816457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:34,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658368331] [2022-11-20 11:10:34,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:34,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:34,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:34,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:34,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:10:35,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:10:35,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:35,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:10:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:10:35,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:10:35,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658368331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:35,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:35,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 11:10:35,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377780891] [2022-11-20 11:10:35,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:10:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:10:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:10:35,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 144 [2022-11-20 11:10:35,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 123 transitions, 398 flow. Second operand has 18 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:35,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:35,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 144 [2022-11-20 11:10:35,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:36,229 INFO L130 PetriNetUnfolder]: 139/871 cut-off events. [2022-11-20 11:10:36,230 INFO L131 PetriNetUnfolder]: For 703/847 co-relation queries the response was YES. [2022-11-20 11:10:36,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 871 events. 139/871 cut-off events. For 703/847 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4156 event pairs, 42 based on Foata normal form. 2/759 useless extension candidates. Maximal degree in co-relation 1754. Up to 200 conditions per place. [2022-11-20 11:10:36,238 INFO L137 encePairwiseOnDemand]: 133/144 looper letters, 114 selfloop transitions, 25 changer transitions 0/216 dead transitions. [2022-11-20 11:10:36,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 216 transitions, 1191 flow [2022-11-20 11:10:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:10:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 11:10:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2463 transitions. [2022-11-20 11:10:36,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7126736111111112 [2022-11-20 11:10:36,244 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2463 transitions. [2022-11-20 11:10:36,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2463 transitions. [2022-11-20 11:10:36,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:36,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2463 transitions. [2022-11-20 11:10:36,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.625) internal successors, (2463), 24 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:36,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:36,259 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:36,260 INFO L175 Difference]: Start difference. First operand has 139 places, 123 transitions, 398 flow. Second operand 24 states and 2463 transitions. [2022-11-20 11:10:36,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 216 transitions, 1191 flow [2022-11-20 11:10:36,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 216 transitions, 1181 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:10:36,265 INFO L231 Difference]: Finished difference. Result has 157 places, 127 transitions, 457 flow [2022-11-20 11:10:36,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=457, PETRI_PLACES=157, PETRI_TRANSITIONS=127} [2022-11-20 11:10:36,266 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 37 predicate places. [2022-11-20 11:10:36,266 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 127 transitions, 457 flow [2022-11-20 11:10:36,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:36,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:36,268 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:36,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:36,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:10:36,473 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:36,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1893728656, now seen corresponding path program 1 times [2022-11-20 11:10:36,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:36,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686875252] [2022-11-20 11:10:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:36,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:36,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:36,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686875252] [2022-11-20 11:10:36,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686875252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:36,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415328331] [2022-11-20 11:10:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:36,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:36,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:36,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:10:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:36,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:10:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:36,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:10:36,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415328331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:36,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:10:36,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 11:10:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698804077] [2022-11-20 11:10:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:36,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:10:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:10:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:10:36,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-11-20 11:10:36,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 127 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:36,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:36,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-11-20 11:10:36,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:37,186 INFO L130 PetriNetUnfolder]: 211/1423 cut-off events. [2022-11-20 11:10:37,187 INFO L131 PetriNetUnfolder]: For 1137/1281 co-relation queries the response was YES. [2022-11-20 11:10:37,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 1423 events. 211/1423 cut-off events. For 1137/1281 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8440 event pairs, 30 based on Foata normal form. 36/1309 useless extension candidates. Maximal degree in co-relation 463. Up to 284 conditions per place. [2022-11-20 11:10:37,199 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 19 selfloop transitions, 8 changer transitions 0/137 dead transitions. [2022-11-20 11:10:37,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 137 transitions, 576 flow [2022-11-20 11:10:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:10:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:10:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2022-11-20 11:10:37,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8472222222222222 [2022-11-20 11:10:37,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2022-11-20 11:10:37,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2022-11-20 11:10:37,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:37,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2022-11-20 11:10:37,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:37,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:37,205 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:37,206 INFO L175 Difference]: Start difference. First operand has 157 places, 127 transitions, 457 flow. Second operand 4 states and 488 transitions. [2022-11-20 11:10:37,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 137 transitions, 576 flow [2022-11-20 11:10:37,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 137 transitions, 518 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-20 11:10:37,211 INFO L231 Difference]: Finished difference. Result has 145 places, 133 transitions, 495 flow [2022-11-20 11:10:37,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=495, PETRI_PLACES=145, PETRI_TRANSITIONS=133} [2022-11-20 11:10:37,213 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 25 predicate places. [2022-11-20 11:10:37,213 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 133 transitions, 495 flow [2022-11-20 11:10:37,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:37,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:37,214 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:37,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:37,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:37,420 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:37,421 INFO L85 PathProgramCache]: Analyzing trace with hash 330984268, now seen corresponding path program 1 times [2022-11-20 11:10:37,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:37,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630498251] [2022-11-20 11:10:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:37,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:10:37,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:37,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630498251] [2022-11-20 11:10:37,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630498251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:37,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:37,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:10:37,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410058023] [2022-11-20 11:10:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:37,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:10:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:10:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:10:37,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2022-11-20 11:10:37,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 133 transitions, 495 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:37,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:37,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2022-11-20 11:10:37,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:38,201 INFO L130 PetriNetUnfolder]: 385/2641 cut-off events. [2022-11-20 11:10:38,201 INFO L131 PetriNetUnfolder]: For 3191/3191 co-relation queries the response was YES. [2022-11-20 11:10:38,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5924 conditions, 2641 events. 385/2641 cut-off events. For 3191/3191 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 20421 event pairs, 66 based on Foata normal form. 96/2437 useless extension candidates. Maximal degree in co-relation 974. Up to 524 conditions per place. [2022-11-20 11:10:38,234 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 27 selfloop transitions, 4 changer transitions 0/141 dead transitions. [2022-11-20 11:10:38,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 141 transitions, 639 flow [2022-11-20 11:10:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:10:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:10:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2022-11-20 11:10:38,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8420138888888888 [2022-11-20 11:10:38,236 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2022-11-20 11:10:38,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2022-11-20 11:10:38,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:38,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2022-11-20 11:10:38,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:38,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:38,240 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:38,241 INFO L175 Difference]: Start difference. First operand has 145 places, 133 transitions, 495 flow. Second operand 4 states and 485 transitions. [2022-11-20 11:10:38,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 141 transitions, 639 flow [2022-11-20 11:10:38,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 632 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 11:10:38,247 INFO L231 Difference]: Finished difference. Result has 149 places, 134 transitions, 511 flow [2022-11-20 11:10:38,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=511, PETRI_PLACES=149, PETRI_TRANSITIONS=134} [2022-11-20 11:10:38,248 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 29 predicate places. [2022-11-20 11:10:38,248 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 134 transitions, 511 flow [2022-11-20 11:10:38,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:38,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:38,249 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:38,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:10:38,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:38,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1026591748, now seen corresponding path program 1 times [2022-11-20 11:10:38,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055901366] [2022-11-20 11:10:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:38,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:38,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055901366] [2022-11-20 11:10:38,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055901366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561205827] [2022-11-20 11:10:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:38,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:38,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:38,714 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:38,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:10:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:38,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:10:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:39,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:40,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561205827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:40,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:40,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2022-11-20 11:10:40,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574913524] [2022-11-20 11:10:40,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:40,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:10:40,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:40,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:10:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:10:40,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 144 [2022-11-20 11:10:40,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 134 transitions, 511 flow. Second operand has 31 states, 31 states have (on average 96.03225806451613) internal successors, (2977), 31 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:40,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:40,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 144 [2022-11-20 11:10:40,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:41,678 INFO L130 PetriNetUnfolder]: 640/2685 cut-off events. [2022-11-20 11:10:41,678 INFO L131 PetriNetUnfolder]: For 5390/5390 co-relation queries the response was YES. [2022-11-20 11:10:41,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7449 conditions, 2685 events. 640/2685 cut-off events. For 5390/5390 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 19185 event pairs, 420 based on Foata normal form. 2/2288 useless extension candidates. Maximal degree in co-relation 1437. Up to 1330 conditions per place. [2022-11-20 11:10:41,702 INFO L137 encePairwiseOnDemand]: 127/144 looper letters, 55 selfloop transitions, 18 changer transitions 19/165 dead transitions. [2022-11-20 11:10:41,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 165 transitions, 826 flow [2022-11-20 11:10:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:10:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-20 11:10:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2211 transitions. [2022-11-20 11:10:41,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.667572463768116 [2022-11-20 11:10:41,714 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2211 transitions. [2022-11-20 11:10:41,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2211 transitions. [2022-11-20 11:10:41,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:41,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2211 transitions. [2022-11-20 11:10:41,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 96.1304347826087) internal successors, (2211), 23 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:41,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:41,730 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:41,731 INFO L175 Difference]: Start difference. First operand has 149 places, 134 transitions, 511 flow. Second operand 23 states and 2211 transitions. [2022-11-20 11:10:41,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 165 transitions, 826 flow [2022-11-20 11:10:41,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 165 transitions, 821 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 11:10:41,741 INFO L231 Difference]: Finished difference. Result has 181 places, 135 transitions, 586 flow [2022-11-20 11:10:41,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=586, PETRI_PLACES=181, PETRI_TRANSITIONS=135} [2022-11-20 11:10:41,742 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 61 predicate places. [2022-11-20 11:10:41,742 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 135 transitions, 586 flow [2022-11-20 11:10:41,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 96.03225806451613) internal successors, (2977), 31 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:41,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:41,744 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:41,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:10:41,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash 258873332, now seen corresponding path program 2 times [2022-11-20 11:10:41,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:41,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300684419] [2022-11-20 11:10:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:41,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:10:42,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:42,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300684419] [2022-11-20 11:10:42,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300684419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:42,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516317077] [2022-11-20 11:10:42,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:42,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:42,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:42,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:42,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:10:42,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:10:42,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 11:10:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:43,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 11:10:43,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:10:43,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:10:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:43,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:46,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:46,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-20 11:10:46,267 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-20 11:10:46,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 144 [2022-11-20 11:10:46,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:10:46,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 95 [2022-11-20 11:10:46,294 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-20 11:10:46,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 96 [2022-11-20 11:10:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:47,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516317077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:47,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:47,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 22, 19] total 44 [2022-11-20 11:10:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665406670] [2022-11-20 11:10:47,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 11:10:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 11:10:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1633, Unknown=28, NotChecked=0, Total=1980 [2022-11-20 11:10:47,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 144 [2022-11-20 11:10:47,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 135 transitions, 586 flow. Second operand has 45 states, 45 states have (on average 75.88888888888889) internal successors, (3415), 45 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:47,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:47,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 144 [2022-11-20 11:10:47,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:10:50,816 INFO L130 PetriNetUnfolder]: 831/4340 cut-off events. [2022-11-20 11:10:50,816 INFO L131 PetriNetUnfolder]: For 9161/9409 co-relation queries the response was YES. [2022-11-20 11:10:50,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11875 conditions, 4340 events. 831/4340 cut-off events. For 9161/9409 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 39111 event pairs, 19 based on Foata normal form. 44/4012 useless extension candidates. Maximal degree in co-relation 3087. Up to 820 conditions per place. [2022-11-20 11:10:50,860 INFO L137 encePairwiseOnDemand]: 116/144 looper letters, 106 selfloop transitions, 69 changer transitions 0/234 dead transitions. [2022-11-20 11:10:50,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 234 transitions, 1595 flow [2022-11-20 11:10:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:10:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 11:10:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3013 transitions. [2022-11-20 11:10:50,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5365028490028491 [2022-11-20 11:10:50,873 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3013 transitions. [2022-11-20 11:10:50,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3013 transitions. [2022-11-20 11:10:50,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:10:50,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3013 transitions. [2022-11-20 11:10:50,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 77.25641025641026) internal successors, (3013), 39 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:50,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 144.0) internal successors, (5760), 40 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:50,895 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 144.0) internal successors, (5760), 40 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:50,895 INFO L175 Difference]: Start difference. First operand has 181 places, 135 transitions, 586 flow. Second operand 39 states and 3013 transitions. [2022-11-20 11:10:50,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 234 transitions, 1595 flow [2022-11-20 11:10:50,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 234 transitions, 1484 flow, removed 40 selfloop flow, removed 17 redundant places. [2022-11-20 11:10:50,910 INFO L231 Difference]: Finished difference. Result has 206 places, 176 transitions, 1136 flow [2022-11-20 11:10:50,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1136, PETRI_PLACES=206, PETRI_TRANSITIONS=176} [2022-11-20 11:10:50,911 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 86 predicate places. [2022-11-20 11:10:50,911 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 176 transitions, 1136 flow [2022-11-20 11:10:50,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 75.88888888888889) internal successors, (3415), 45 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:50,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:10:50,913 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:50,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:51,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:51,124 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:10:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1653712901, now seen corresponding path program 1 times [2022-11-20 11:10:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:51,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439104377] [2022-11-20 11:10:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:55,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:55,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439104377] [2022-11-20 11:10:55,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439104377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:55,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579346331] [2022-11-20 11:10:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:55,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:55,511 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:55,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:10:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 11:10:55,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:57,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:57,606 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-20 11:10:57,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 56 [2022-11-20 11:10:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:59,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579346331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:59,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:59,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14, 14] total 54 [2022-11-20 11:10:59,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752541928] [2022-11-20 11:10:59,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:59,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:10:59,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:10:59,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2635, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 11:10:59,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2022-11-20 11:10:59,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 176 transitions, 1136 flow. Second operand has 55 states, 55 states have (on average 72.0) internal successors, (3960), 55 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:59,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:10:59,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2022-11-20 11:10:59,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:11:23,833 INFO L130 PetriNetUnfolder]: 3264/9580 cut-off events. [2022-11-20 11:11:23,833 INFO L131 PetriNetUnfolder]: For 66921/67003 co-relation queries the response was YES. [2022-11-20 11:11:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34917 conditions, 9580 events. 3264/9580 cut-off events. For 66921/67003 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 88302 event pairs, 20 based on Foata normal form. 646/9757 useless extension candidates. Maximal degree in co-relation 28547. Up to 2467 conditions per place. [2022-11-20 11:11:23,945 INFO L137 encePairwiseOnDemand]: 114/144 looper letters, 328 selfloop transitions, 139 changer transitions 75/597 dead transitions. [2022-11-20 11:11:23,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 597 transitions, 4912 flow [2022-11-20 11:11:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-20 11:11:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-11-20 11:11:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 7524 transitions. [2022-11-20 11:11:23,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5173267326732673 [2022-11-20 11:11:23,963 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 7524 transitions. [2022-11-20 11:11:23,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 7524 transitions. [2022-11-20 11:11:23,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:11:23,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 7524 transitions. [2022-11-20 11:11:23,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 74.4950495049505) internal successors, (7524), 101 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:24,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 144.0) internal successors, (14688), 102 states have internal predecessors, (14688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:24,007 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 144.0) internal successors, (14688), 102 states have internal predecessors, (14688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:24,008 INFO L175 Difference]: Start difference. First operand has 206 places, 176 transitions, 1136 flow. Second operand 101 states and 7524 transitions. [2022-11-20 11:11:24,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 597 transitions, 4912 flow [2022-11-20 11:11:24,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 597 transitions, 4645 flow, removed 108 selfloop flow, removed 19 redundant places. [2022-11-20 11:11:24,409 INFO L231 Difference]: Finished difference. Result has 326 places, 257 transitions, 2390 flow [2022-11-20 11:11:24,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=2390, PETRI_PLACES=326, PETRI_TRANSITIONS=257} [2022-11-20 11:11:24,410 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 206 predicate places. [2022-11-20 11:11:24,411 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 257 transitions, 2390 flow [2022-11-20 11:11:24,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 72.0) internal successors, (3960), 55 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:24,412 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:11:24,412 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:24,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 11:11:24,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:11:24,619 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:11:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1224931097, now seen corresponding path program 2 times [2022-11-20 11:11:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:24,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519222863] [2022-11-20 11:11:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:29,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:29,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519222863] [2022-11-20 11:11:29,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519222863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:29,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520989496] [2022-11-20 11:11:29,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:11:29,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:29,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:29,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:29,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:11:29,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:11:29,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:11:29,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:11:30,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:31,156 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2022-11-20 11:11:31,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 61 [2022-11-20 11:11:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:11:32,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520989496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:32,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:11:32,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7, 6] total 40 [2022-11-20 11:11:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004133422] [2022-11-20 11:11:32,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:32,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:11:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:11:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:11:32,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-11-20 11:11:32,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 257 transitions, 2390 flow. Second operand has 41 states, 41 states have (on average 70.8780487804878) internal successors, (2906), 41 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:32,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:11:32,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-11-20 11:11:32,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:11:43,869 INFO L130 PetriNetUnfolder]: 4027/11153 cut-off events. [2022-11-20 11:11:43,869 INFO L131 PetriNetUnfolder]: For 195483/195631 co-relation queries the response was YES. [2022-11-20 11:11:43,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60017 conditions, 11153 events. 4027/11153 cut-off events. For 195483/195631 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 102161 event pairs, 516 based on Foata normal form. 117/10698 useless extension candidates. Maximal degree in co-relation 59808. Up to 4079 conditions per place. [2022-11-20 11:11:44,022 INFO L137 encePairwiseOnDemand]: 113/144 looper letters, 312 selfloop transitions, 175 changer transitions 11/551 dead transitions. [2022-11-20 11:11:44,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 551 transitions, 7415 flow [2022-11-20 11:11:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-20 11:11:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-20 11:11:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4023 transitions. [2022-11-20 11:11:44,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49888392857142855 [2022-11-20 11:11:44,034 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4023 transitions. [2022-11-20 11:11:44,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4023 transitions. [2022-11-20 11:11:44,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:11:44,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4023 transitions. [2022-11-20 11:11:44,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 71.83928571428571) internal successors, (4023), 56 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:44,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 144.0) internal successors, (8208), 57 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:44,058 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 144.0) internal successors, (8208), 57 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:44,058 INFO L175 Difference]: Start difference. First operand has 326 places, 257 transitions, 2390 flow. Second operand 56 states and 4023 transitions. [2022-11-20 11:11:44,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 551 transitions, 7415 flow [2022-11-20 11:11:44,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 551 transitions, 5379 flow, removed 832 selfloop flow, removed 42 redundant places. [2022-11-20 11:11:44,774 INFO L231 Difference]: Finished difference. Result has 344 places, 384 transitions, 3441 flow [2022-11-20 11:11:44,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=3441, PETRI_PLACES=344, PETRI_TRANSITIONS=384} [2022-11-20 11:11:44,775 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 224 predicate places. [2022-11-20 11:11:44,775 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 384 transitions, 3441 flow [2022-11-20 11:11:44,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 70.8780487804878) internal successors, (2906), 41 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:44,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:11:44,776 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:44,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:44,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:11:44,979 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:11:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1224931098, now seen corresponding path program 3 times [2022-11-20 11:11:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:44,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121572580] [2022-11-20 11:11:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:11:45,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:45,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121572580] [2022-11-20 11:11:45,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121572580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998879122] [2022-11-20 11:11:45,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:11:45,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:45,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:45,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:45,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:11:45,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:11:45,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:11:45,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:11:45,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:46,044 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 11:11:46,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-11-20 11:11:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:11:46,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998879122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:46,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:11:46,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-20 11:11:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491734953] [2022-11-20 11:11:46,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:46,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:11:46,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:11:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:11:46,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 144 [2022-11-20 11:11:46,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 384 transitions, 3441 flow. Second operand has 14 states, 14 states have (on average 108.28571428571429) internal successors, (1516), 14 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:46,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:11:46,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 144 [2022-11-20 11:11:46,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:11:49,293 INFO L130 PetriNetUnfolder]: 1733/9366 cut-off events. [2022-11-20 11:11:49,293 INFO L131 PetriNetUnfolder]: For 175737/177025 co-relation queries the response was YES. [2022-11-20 11:11:49,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44898 conditions, 9366 events. 1733/9366 cut-off events. For 175737/177025 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 101496 event pairs, 67 based on Foata normal form. 441/9265 useless extension candidates. Maximal degree in co-relation 44706. Up to 1843 conditions per place. [2022-11-20 11:11:49,421 INFO L137 encePairwiseOnDemand]: 133/144 looper letters, 205 selfloop transitions, 149 changer transitions 0/484 dead transitions. [2022-11-20 11:11:49,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 484 transitions, 5480 flow [2022-11-20 11:11:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:11:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 11:11:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2080 transitions. [2022-11-20 11:11:49,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7602339181286549 [2022-11-20 11:11:49,429 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2080 transitions. [2022-11-20 11:11:49,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2080 transitions. [2022-11-20 11:11:49,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:11:49,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2080 transitions. [2022-11-20 11:11:49,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 109.47368421052632) internal successors, (2080), 19 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:49,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 144.0) internal successors, (2880), 20 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:49,438 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 144.0) internal successors, (2880), 20 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:49,438 INFO L175 Difference]: Start difference. First operand has 344 places, 384 transitions, 3441 flow. Second operand 19 states and 2080 transitions. [2022-11-20 11:11:49,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 484 transitions, 5480 flow [2022-11-20 11:11:49,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 484 transitions, 4930 flow, removed 186 selfloop flow, removed 22 redundant places. [2022-11-20 11:11:49,973 INFO L231 Difference]: Finished difference. Result has 350 places, 459 transitions, 4610 flow [2022-11-20 11:11:49,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4610, PETRI_PLACES=350, PETRI_TRANSITIONS=459} [2022-11-20 11:11:49,974 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 230 predicate places. [2022-11-20 11:11:49,975 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 459 transitions, 4610 flow [2022-11-20 11:11:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.28571428571429) internal successors, (1516), 14 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:49,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:11:49,975 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:49,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:50,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:50,181 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:11:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash -269696338, now seen corresponding path program 1 times [2022-11-20 11:11:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:50,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707550548] [2022-11-20 11:11:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:50,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:52,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:52,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707550548] [2022-11-20 11:11:52,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707550548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:52,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853697337] [2022-11-20 11:11:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:52,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:52,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:52,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:52,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:11:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:11:52,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:53,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:53,599 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-20 11:11:53,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-20 11:11:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:54,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853697337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:54,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:11:54,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 47 [2022-11-20 11:11:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374389652] [2022-11-20 11:11:54,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:54,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:11:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:11:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:11:54,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 144 [2022-11-20 11:11:54,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 459 transitions, 4610 flow. Second operand has 48 states, 48 states have (on average 79.25) internal successors, (3804), 48 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:54,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:11:54,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 144 [2022-11-20 11:11:54,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:05,183 INFO L130 PetriNetUnfolder]: 6404/19029 cut-off events. [2022-11-20 11:12:05,183 INFO L131 PetriNetUnfolder]: For 440744/441495 co-relation queries the response was YES. [2022-11-20 11:12:05,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112834 conditions, 19029 events. 6404/19029 cut-off events. For 440744/441495 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 198118 event pairs, 554 based on Foata normal form. 816/18832 useless extension candidates. Maximal degree in co-relation 112621. Up to 3549 conditions per place. [2022-11-20 11:12:05,755 INFO L137 encePairwiseOnDemand]: 116/144 looper letters, 319 selfloop transitions, 189 changer transitions 21/589 dead transitions. [2022-11-20 11:12:05,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 589 transitions, 8583 flow [2022-11-20 11:12:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 11:12:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 11:12:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4004 transitions. [2022-11-20 11:12:05,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2022-11-20 11:12:05,765 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4004 transitions. [2022-11-20 11:12:05,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4004 transitions. [2022-11-20 11:12:05,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:05,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4004 transitions. [2022-11-20 11:12:05,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 81.71428571428571) internal successors, (4004), 49 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 144.0) internal successors, (7200), 50 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,787 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 144.0) internal successors, (7200), 50 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,788 INFO L175 Difference]: Start difference. First operand has 350 places, 459 transitions, 4610 flow. Second operand 49 states and 4004 transitions. [2022-11-20 11:12:05,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 589 transitions, 8583 flow [2022-11-20 11:12:06,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 589 transitions, 6174 flow, removed 1143 selfloop flow, removed 25 redundant places. [2022-11-20 11:12:06,834 INFO L231 Difference]: Finished difference. Result has 348 places, 387 transitions, 3842 flow [2022-11-20 11:12:06,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=3842, PETRI_PLACES=348, PETRI_TRANSITIONS=387} [2022-11-20 11:12:06,835 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 228 predicate places. [2022-11-20 11:12:06,836 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 387 transitions, 3842 flow [2022-11-20 11:12:06,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 79.25) internal successors, (3804), 48 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:06,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:06,837 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:06,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 11:12:07,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:07,043 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:12:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1880894841, now seen corresponding path program 1 times [2022-11-20 11:12:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:07,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622806289] [2022-11-20 11:12:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:09,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:09,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622806289] [2022-11-20 11:12:09,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622806289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:09,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628261675] [2022-11-20 11:12:09,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:09,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:09,717 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:09,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:12:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:09,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-20 11:12:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:10,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 11:12:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:11,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 11:12:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:11,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 11:12:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:12,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:14,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:14,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2022-11-20 11:12:14,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:14,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 229 [2022-11-20 11:12:14,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:14,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 149 [2022-11-20 11:12:14,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:14,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2022-11-20 11:12:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:19,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628261675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:19,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:19,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 71 [2022-11-20 11:12:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438390792] [2022-11-20 11:12:19,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:19,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-20 11:12:19,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-20 11:12:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=4747, Unknown=10, NotChecked=0, Total=5112 [2022-11-20 11:12:20,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-11-20 11:12:20,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 387 transitions, 3842 flow. Second operand has 72 states, 72 states have (on average 69.5) internal successors, (5004), 72 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:20,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:20,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-11-20 11:12:20,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:33,757 INFO L130 PetriNetUnfolder]: 8352/24338 cut-off events. [2022-11-20 11:12:33,757 INFO L131 PetriNetUnfolder]: For 281759/282492 co-relation queries the response was YES. [2022-11-20 11:12:34,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119906 conditions, 24338 events. 8352/24338 cut-off events. For 281759/282492 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 258551 event pairs, 1142 based on Foata normal form. 231/23156 useless extension candidates. Maximal degree in co-relation 119688. Up to 10737 conditions per place. [2022-11-20 11:12:34,189 INFO L137 encePairwiseOnDemand]: 108/144 looper letters, 276 selfloop transitions, 240 changer transitions 2/571 dead transitions. [2022-11-20 11:12:34,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 571 transitions, 6844 flow [2022-11-20 11:12:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 11:12:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-20 11:12:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3585 transitions. [2022-11-20 11:12:34,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4881535947712418 [2022-11-20 11:12:34,200 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3585 transitions. [2022-11-20 11:12:34,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3585 transitions. [2022-11-20 11:12:34,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:34,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3585 transitions. [2022-11-20 11:12:34,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 70.29411764705883) internal successors, (3585), 51 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:34,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 144.0) internal successors, (7488), 52 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:34,223 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 144.0) internal successors, (7488), 52 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:34,223 INFO L175 Difference]: Start difference. First operand has 348 places, 387 transitions, 3842 flow. Second operand 51 states and 3585 transitions. [2022-11-20 11:12:34,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 571 transitions, 6844 flow [2022-11-20 11:12:36,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 571 transitions, 6407 flow, removed 98 selfloop flow, removed 36 redundant places. [2022-11-20 11:12:36,083 INFO L231 Difference]: Finished difference. Result has 368 places, 528 transitions, 6055 flow [2022-11-20 11:12:36,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=6055, PETRI_PLACES=368, PETRI_TRANSITIONS=528} [2022-11-20 11:12:36,085 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 248 predicate places. [2022-11-20 11:12:36,085 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 528 transitions, 6055 flow [2022-11-20 11:12:36,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 69.5) internal successors, (5004), 72 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:36,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:36,086 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:36,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:36,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:12:36,292 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:12:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash -8621585, now seen corresponding path program 2 times [2022-11-20 11:12:36,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:36,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282715446] [2022-11-20 11:12:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:36,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:38,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:38,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282715446] [2022-11-20 11:12:38,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282715446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:38,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136231396] [2022-11-20 11:12:38,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:12:38,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:38,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:38,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:38,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:12:38,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:12:38,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:38,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:12:38,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:38,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:39,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:39,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 70 [2022-11-20 11:12:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:12:39,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136231396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:39,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:39,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9, 6] total 35 [2022-11-20 11:12:39,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199930721] [2022-11-20 11:12:39,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:39,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:12:39,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:39,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:12:39,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:12:39,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 144 [2022-11-20 11:12:39,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 528 transitions, 6055 flow. Second operand has 36 states, 36 states have (on average 80.25) internal successors, (2889), 36 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:39,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:39,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 144 [2022-11-20 11:12:39,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:52,401 INFO L130 PetriNetUnfolder]: 11100/31134 cut-off events. [2022-11-20 11:12:52,401 INFO L131 PetriNetUnfolder]: For 437071/439120 co-relation queries the response was YES. [2022-11-20 11:12:52,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169463 conditions, 31134 events. 11100/31134 cut-off events. For 437071/439120 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 344820 event pairs, 1075 based on Foata normal form. 932/30079 useless extension candidates. Maximal degree in co-relation 169229. Up to 9746 conditions per place. [2022-11-20 11:12:53,024 INFO L137 encePairwiseOnDemand]: 120/144 looper letters, 533 selfloop transitions, 143 changer transitions 6/744 dead transitions. [2022-11-20 11:12:53,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 744 transitions, 10122 flow [2022-11-20 11:12:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 11:12:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-20 11:12:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3078 transitions. [2022-11-20 11:12:53,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5625 [2022-11-20 11:12:53,030 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3078 transitions. [2022-11-20 11:12:53,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3078 transitions. [2022-11-20 11:12:53,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:53,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3078 transitions. [2022-11-20 11:12:53,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 81.0) internal successors, (3078), 38 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:53,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:53,045 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:53,045 INFO L175 Difference]: Start difference. First operand has 368 places, 528 transitions, 6055 flow. Second operand 38 states and 3078 transitions. [2022-11-20 11:12:53,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 744 transitions, 10122 flow [2022-11-20 11:12:57,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 744 transitions, 9513 flow, removed 247 selfloop flow, removed 40 redundant places. [2022-11-20 11:12:57,878 INFO L231 Difference]: Finished difference. Result has 365 places, 533 transitions, 6216 flow [2022-11-20 11:12:57,878 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6216, PETRI_PLACES=365, PETRI_TRANSITIONS=533} [2022-11-20 11:12:57,879 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 245 predicate places. [2022-11-20 11:12:57,879 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 533 transitions, 6216 flow [2022-11-20 11:12:57,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 80.25) internal successors, (2889), 36 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:57,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:57,879 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:57,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 11:12:58,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:12:58,080 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:12:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:58,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1709887303, now seen corresponding path program 3 times [2022-11-20 11:12:58,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:58,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422608127] [2022-11-20 11:12:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:58,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:12:58,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:58,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422608127] [2022-11-20 11:12:58,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422608127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389121180] [2022-11-20 11:12:58,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:12:58,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:58,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:58,231 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:58,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:12:58,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:12:58,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:58,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:12:58,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:12:58,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:12:59,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389121180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:59,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:59,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 24 [2022-11-20 11:12:59,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753411125] [2022-11-20 11:12:59,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:59,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:12:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:12:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:12:59,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 144 [2022-11-20 11:12:59,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 533 transitions, 6216 flow. Second operand has 24 states, 24 states have (on average 100.66666666666667) internal successors, (2416), 24 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:59,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:59,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 144 [2022-11-20 11:12:59,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:09,000 INFO L130 PetriNetUnfolder]: 7214/29408 cut-off events. [2022-11-20 11:13:09,000 INFO L131 PetriNetUnfolder]: For 365884/372889 co-relation queries the response was YES. [2022-11-20 11:13:09,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131491 conditions, 29408 events. 7214/29408 cut-off events. For 365884/372889 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 379840 event pairs, 300 based on Foata normal form. 2001/29470 useless extension candidates. Maximal degree in co-relation 131278. Up to 7995 conditions per place. [2022-11-20 11:13:09,520 INFO L137 encePairwiseOnDemand]: 127/144 looper letters, 152 selfloop transitions, 135 changer transitions 184/579 dead transitions. [2022-11-20 11:13:09,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 579 transitions, 7709 flow [2022-11-20 11:13:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:13:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-20 11:13:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2822 transitions. [2022-11-20 11:13:09,524 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6999007936507936 [2022-11-20 11:13:09,524 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2822 transitions. [2022-11-20 11:13:09,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2822 transitions. [2022-11-20 11:13:09,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:09,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2822 transitions. [2022-11-20 11:13:09,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 100.78571428571429) internal successors, (2822), 28 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:09,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:09,535 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:09,535 INFO L175 Difference]: Start difference. First operand has 365 places, 533 transitions, 6216 flow. Second operand 28 states and 2822 transitions. [2022-11-20 11:13:09,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 579 transitions, 7709 flow [2022-11-20 11:13:14,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 579 transitions, 7421 flow, removed 52 selfloop flow, removed 33 redundant places. [2022-11-20 11:13:14,758 INFO L231 Difference]: Finished difference. Result has 364 places, 366 transitions, 4612 flow [2022-11-20 11:13:14,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4612, PETRI_PLACES=364, PETRI_TRANSITIONS=366} [2022-11-20 11:13:14,759 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 244 predicate places. [2022-11-20 11:13:14,760 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 366 transitions, 4612 flow [2022-11-20 11:13:14,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.66666666666667) internal successors, (2416), 24 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:14,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:14,760 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:14,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:14,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aabc5e43-5f81-4705-a191-b0ee724ef0e0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:14,961 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:13:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1507177018, now seen corresponding path program 4 times [2022-11-20 11:13:14,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85247629] [2022-11-20 11:13:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:14,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat