./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f 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_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8 --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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- 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-e04fb08 [2022-11-16 12:29:33,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:29:33,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:29:33,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:29:33,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:29:33,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:29:33,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:29:33,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:29:33,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:29:33,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:29:33,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:29:33,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:29:33,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:29:33,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:29:33,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:29:33,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:29:33,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:29:33,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:29:33,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:29:33,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:29:33,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:29:33,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:29:33,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:29:33,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:29:33,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:29:33,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:29:33,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:29:33,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:29:33,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:29:33,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:29:33,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:29:33,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:29:33,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:29:33,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:29:33,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:29:33,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:29:33,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:29:33,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:29:33,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:29:33,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:29:33,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:29:33,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:29:33,484 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:29:33,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:29:33,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:29:33,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:29:33,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:29:33,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:29:33,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:29:33,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:29:33,488 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:29:33,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:29:33,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:29:33,490 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:29:33,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:29:33,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:29:33,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:29:33,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:29:33,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:29:33,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:29:33,491 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:29:33,492 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:29:33,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:29:33,492 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:29:33,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:29:33,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:29:33,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:29:33,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:29:33,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:29:33,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:29:33,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:29:33,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:29:33,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:29:33,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:29:33,497 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:29:33,497 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:29:33,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:29:33,497 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_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-11-16 12:29:33,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:29:33,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:29:33,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:29:33,905 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:29:33,906 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:29:33,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-11-16 12:29:34,016 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/data/12848bef7/7fdbffe66f3643c2b6ebd4b7d3ec48ee/FLAGf9e9b2f37 [2022-11-16 12:29:34,635 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:29:34,638 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-11-16 12:29:34,652 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/data/12848bef7/7fdbffe66f3643c2b6ebd4b7d3ec48ee/FLAGf9e9b2f37 [2022-11-16 12:29:34,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/data/12848bef7/7fdbffe66f3643c2b6ebd4b7d3ec48ee [2022-11-16 12:29:34,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:29:34,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:29:34,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:29:34,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:29:34,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:29:34,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:29:34" (1/1) ... [2022-11-16 12:29:34,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fb9715a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:34, skipping insertion in model container [2022-11-16 12:29:34,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:29:34" (1/1) ... [2022-11-16 12:29:34,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:29:35,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:29:35,414 WARN L229 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_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-11-16 12:29:35,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:29:35,451 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:29:35,500 WARN L229 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_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-11-16 12:29:35,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:29:35,540 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:29:35,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35 WrapperNode [2022-11-16 12:29:35,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:29:35,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:29:35,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:29:35,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:29:35,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,632 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 156 [2022-11-16 12:29:35,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:29:35,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:29:35,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:29:35,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:29:35,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:29:35,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:29:35,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:29:35,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:29:35,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (1/1) ... [2022-11-16 12:29:35,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:29:35,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:35,763 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:29:35,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:29:35,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:29:35,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:29:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:29:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:29:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:29:35,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:29:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:29:35,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:29:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:29:35,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:29:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:29:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:29:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:29:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:29:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:29:35,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:29:35,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:29:35,821 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:29:35,974 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:29:35,976 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:29:36,560 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:29:36,626 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:29:36,626 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 12:29:36,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:29:36 BoogieIcfgContainer [2022-11-16 12:29:36,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:29:36,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:29:36,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:29:36,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:29:36,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:29:34" (1/3) ... [2022-11-16 12:29:36,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46218ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:29:36, skipping insertion in model container [2022-11-16 12:29:36,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:35" (2/3) ... [2022-11-16 12:29:36,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46218ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:29:36, skipping insertion in model container [2022-11-16 12:29:36,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:29:36" (3/3) ... [2022-11-16 12:29:36,643 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2022-11-16 12:29:36,654 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:29:36,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:29:36,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-16 12:29:36,669 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:29:36,780 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:29:36,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 253 transitions, 530 flow [2022-11-16 12:29:36,942 INFO L130 PetriNetUnfolder]: 20/250 cut-off events. [2022-11-16 12:29:36,943 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:29:36,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 250 events. 20/250 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 237 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 206. Up to 3 conditions per place. [2022-11-16 12:29:36,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 253 transitions, 530 flow [2022-11-16 12:29:36,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 229 transitions, 473 flow [2022-11-16 12:29:36,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:29:36,981 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;@36c0fde5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:29:36,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-11-16 12:29:37,016 INFO L130 PetriNetUnfolder]: 3/60 cut-off events. [2022-11-16 12:29:37,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:29:37,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:37,028 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:37,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash 310039223, now seen corresponding path program 1 times [2022-11-16 12:29:37,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:37,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550100646] [2022-11-16 12:29:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:37,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550100646] [2022-11-16 12:29:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550100646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:37,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:37,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:29:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210380588] [2022-11-16 12:29:37,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:37,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:37,698 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 253 [2022-11-16 12:29:37,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 229 transitions, 473 flow. Second operand has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:37,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:37,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 253 [2022-11-16 12:29:37,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:29:38,176 INFO L130 PetriNetUnfolder]: 75/517 cut-off events. [2022-11-16 12:29:38,176 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-16 12:29:38,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 517 events. 75/517 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1850 event pairs, 34 based on Foata normal form. 68/475 useless extension candidates. Maximal degree in co-relation 369. Up to 93 conditions per place. [2022-11-16 12:29:38,192 INFO L137 encePairwiseOnDemand]: 221/253 looper letters, 66 selfloop transitions, 14 changer transitions 6/252 dead transitions. [2022-11-16 12:29:38,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 252 transitions, 694 flow [2022-11-16 12:29:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:29:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:29:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1069 transitions. [2022-11-16 12:29:38,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8450592885375494 [2022-11-16 12:29:38,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1069 transitions. [2022-11-16 12:29:38,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1069 transitions. [2022-11-16 12:29:38,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:29:38,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1069 transitions. [2022-11-16 12:29:38,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.8) internal successors, (1069), 5 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:38,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:38,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:38,259 INFO L175 Difference]: Start difference. First operand has 220 places, 229 transitions, 473 flow. Second operand 5 states and 1069 transitions. [2022-11-16 12:29:38,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 252 transitions, 694 flow [2022-11-16 12:29:38,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 252 transitions, 676 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:29:38,274 INFO L231 Difference]: Finished difference. Result has 222 places, 222 transitions, 532 flow [2022-11-16 12:29:38,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=532, PETRI_PLACES=222, PETRI_TRANSITIONS=222} [2022-11-16 12:29:38,282 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 2 predicate places. [2022-11-16 12:29:38,282 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 222 transitions, 532 flow [2022-11-16 12:29:38,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:38,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:38,285 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:38,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:29:38,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:38,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2061385864, now seen corresponding path program 1 times [2022-11-16 12:29:38,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:38,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757374729] [2022-11-16 12:29:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:38,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:38,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:38,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757374729] [2022-11-16 12:29:38,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757374729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26873453] [2022-11-16 12:29:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:38,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:38,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:38,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:38,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:29:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:38,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:29:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:38,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:38,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26873453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:38,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:29:38,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:29:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17309829] [2022-11-16 12:29:38,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:38,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:29:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:38,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:29:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:29:38,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 253 [2022-11-16 12:29:38,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 222 transitions, 532 flow. Second operand has 12 states, 12 states have (on average 195.66666666666666) internal successors, (2348), 12 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:38,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:38,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 253 [2022-11-16 12:29:38,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:29:39,882 INFO L130 PetriNetUnfolder]: 186/1153 cut-off events. [2022-11-16 12:29:39,883 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2022-11-16 12:29:39,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1706 conditions, 1153 events. 186/1153 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6115 event pairs, 85 based on Foata normal form. 9/917 useless extension candidates. Maximal degree in co-relation 1016. Up to 84 conditions per place. [2022-11-16 12:29:39,898 INFO L137 encePairwiseOnDemand]: 230/253 looper letters, 129 selfloop transitions, 62 changer transitions 0/357 dead transitions. [2022-11-16 12:29:39,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 357 transitions, 1286 flow [2022-11-16 12:29:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:29:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:29:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3674 transitions. [2022-11-16 12:29:39,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8067632850241546 [2022-11-16 12:29:39,909 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3674 transitions. [2022-11-16 12:29:39,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3674 transitions. [2022-11-16 12:29:39,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:29:39,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3674 transitions. [2022-11-16 12:29:39,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 204.11111111111111) internal successors, (3674), 18 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:39,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:39,935 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:39,936 INFO L175 Difference]: Start difference. First operand has 222 places, 222 transitions, 532 flow. Second operand 18 states and 3674 transitions. [2022-11-16 12:29:39,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 357 transitions, 1286 flow [2022-11-16 12:29:39,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 357 transitions, 1278 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:29:39,946 INFO L231 Difference]: Finished difference. Result has 236 places, 264 transitions, 894 flow [2022-11-16 12:29:39,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=894, PETRI_PLACES=236, PETRI_TRANSITIONS=264} [2022-11-16 12:29:39,948 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 16 predicate places. [2022-11-16 12:29:39,949 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 264 transitions, 894 flow [2022-11-16 12:29:39,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.66666666666666) internal successors, (2348), 12 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:39,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:39,951 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] [2022-11-16 12:29:39,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:29:40,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:40,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash -521547190, now seen corresponding path program 1 times [2022-11-16 12:29:40,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:40,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834752186] [2022-11-16 12:29:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:40,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:40,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:40,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834752186] [2022-11-16 12:29:40,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834752186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:40,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326653162] [2022-11-16 12:29:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:40,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:40,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:40,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:40,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:29:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:40,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:29:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:40,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:29:40,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326653162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:40,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:29:40,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:29:40,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526531208] [2022-11-16 12:29:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:40,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:29:40,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:29:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:29:40,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 253 [2022-11-16 12:29:40,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 264 transitions, 894 flow. Second operand has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:40,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:40,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 253 [2022-11-16 12:29:40,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:29:41,196 INFO L130 PetriNetUnfolder]: 186/1141 cut-off events. [2022-11-16 12:29:41,196 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2022-11-16 12:29:41,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 1141 events. 186/1141 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6048 event pairs, 85 based on Foata normal form. 12/908 useless extension candidates. Maximal degree in co-relation 1363. Up to 264 conditions per place. [2022-11-16 12:29:41,213 INFO L137 encePairwiseOnDemand]: 236/253 looper letters, 67 selfloop transitions, 43 changer transitions 0/276 dead transitions. [2022-11-16 12:29:41,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 276 transitions, 1093 flow [2022-11-16 12:29:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:29:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:29:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1431 transitions. [2022-11-16 12:29:41,218 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8080180688876341 [2022-11-16 12:29:41,218 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1431 transitions. [2022-11-16 12:29:41,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1431 transitions. [2022-11-16 12:29:41,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:29:41,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1431 transitions. [2022-11-16 12:29:41,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 204.42857142857142) internal successors, (1431), 7 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:41,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 253.0) internal successors, (2024), 8 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:41,229 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 253.0) internal successors, (2024), 8 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:41,229 INFO L175 Difference]: Start difference. First operand has 236 places, 264 transitions, 894 flow. Second operand 7 states and 1431 transitions. [2022-11-16 12:29:41,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 276 transitions, 1093 flow [2022-11-16 12:29:41,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 276 transitions, 977 flow, removed 41 selfloop flow, removed 5 redundant places. [2022-11-16 12:29:41,247 INFO L231 Difference]: Finished difference. Result has 230 places, 252 transitions, 783 flow [2022-11-16 12:29:41,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=230, PETRI_TRANSITIONS=252} [2022-11-16 12:29:41,251 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 10 predicate places. [2022-11-16 12:29:41,251 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 252 transitions, 783 flow [2022-11-16 12:29:41,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:41,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:41,252 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-16 12:29:41,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:41,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:41,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 462832635, now seen corresponding path program 2 times [2022-11-16 12:29:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:41,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691057820] [2022-11-16 12:29:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:41,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:41,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:41,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691057820] [2022-11-16 12:29:41,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691057820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:41,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522656595] [2022-11-16 12:29:41,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:29:41,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:41,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:41,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:41,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:29:41,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:29:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:29:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:29:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 12:29:42,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 12:29:42,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522656595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:42,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:29:42,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 12:29:42,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000336807] [2022-11-16 12:29:42,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:42,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:29:42,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:29:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:29:42,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 253 [2022-11-16 12:29:42,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 252 transitions, 783 flow. Second operand has 18 states, 18 states have (on average 170.61111111111111) internal successors, (3071), 18 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:42,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:42,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 253 [2022-11-16 12:29:42,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:29:45,084 INFO L130 PetriNetUnfolder]: 1842/5394 cut-off events. [2022-11-16 12:29:45,084 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-11-16 12:29:45,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8694 conditions, 5394 events. 1842/5394 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 42542 event pairs, 1127 based on Foata normal form. 6/3531 useless extension candidates. Maximal degree in co-relation 6938. Up to 427 conditions per place. [2022-11-16 12:29:45,150 INFO L137 encePairwiseOnDemand]: 226/253 looper letters, 224 selfloop transitions, 81 changer transitions 0/445 dead transitions. [2022-11-16 12:29:45,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 445 transitions, 1882 flow [2022-11-16 12:29:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:29:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:29:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4319 transitions. [2022-11-16 12:29:45,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7112977602108037 [2022-11-16 12:29:45,163 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4319 transitions. [2022-11-16 12:29:45,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4319 transitions. [2022-11-16 12:29:45,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:29:45,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4319 transitions. [2022-11-16 12:29:45,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 179.95833333333334) internal successors, (4319), 24 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:45,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:45,198 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:45,198 INFO L175 Difference]: Start difference. First operand has 230 places, 252 transitions, 783 flow. Second operand 24 states and 4319 transitions. [2022-11-16 12:29:45,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 445 transitions, 1882 flow [2022-11-16 12:29:45,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 445 transitions, 1791 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-16 12:29:45,217 INFO L231 Difference]: Finished difference. Result has 242 places, 268 transitions, 946 flow [2022-11-16 12:29:45,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=946, PETRI_PLACES=242, PETRI_TRANSITIONS=268} [2022-11-16 12:29:45,220 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 22 predicate places. [2022-11-16 12:29:45,221 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 268 transitions, 946 flow [2022-11-16 12:29:45,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 170.61111111111111) internal successors, (3071), 18 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:45,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:45,223 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:45,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:45,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:45,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1911360043, now seen corresponding path program 1 times [2022-11-16 12:29:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281227551] [2022-11-16 12:29:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:45,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:45,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281227551] [2022-11-16 12:29:45,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281227551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:45,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:45,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:29:45,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999510931] [2022-11-16 12:29:45,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:45,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:29:45,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:29:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:29:45,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 253 [2022-11-16 12:29:45,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 268 transitions, 946 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:45,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:45,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 253 [2022-11-16 12:29:45,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:29:46,320 INFO L130 PetriNetUnfolder]: 512/2321 cut-off events. [2022-11-16 12:29:46,320 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2022-11-16 12:29:46,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3711 conditions, 2321 events. 512/2321 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 17203 event pairs, 259 based on Foata normal form. 0/1915 useless extension candidates. Maximal degree in co-relation 654. Up to 596 conditions per place. [2022-11-16 12:29:46,359 INFO L137 encePairwiseOnDemand]: 249/253 looper letters, 21 selfloop transitions, 2 changer transitions 0/277 dead transitions. [2022-11-16 12:29:46,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 277 transitions, 1014 flow [2022-11-16 12:29:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:29:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:29:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2022-11-16 12:29:46,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9183135704874835 [2022-11-16 12:29:46,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2022-11-16 12:29:46,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2022-11-16 12:29:46,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:29:46,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2022-11-16 12:29:46,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:46,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:46,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:46,372 INFO L175 Difference]: Start difference. First operand has 242 places, 268 transitions, 946 flow. Second operand 3 states and 697 transitions. [2022-11-16 12:29:46,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 277 transitions, 1014 flow [2022-11-16 12:29:46,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 277 transitions, 891 flow, removed 12 selfloop flow, removed 15 redundant places. [2022-11-16 12:29:46,382 INFO L231 Difference]: Finished difference. Result has 230 places, 269 transitions, 837 flow [2022-11-16 12:29:46,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=837, PETRI_PLACES=230, PETRI_TRANSITIONS=269} [2022-11-16 12:29:46,387 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 10 predicate places. [2022-11-16 12:29:46,387 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 269 transitions, 837 flow [2022-11-16 12:29:46,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:46,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:46,388 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:46,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:29:46,389 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:46,390 INFO L85 PathProgramCache]: Analyzing trace with hash 99647845, now seen corresponding path program 1 times [2022-11-16 12:29:46,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:46,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136175740] [2022-11-16 12:29:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:46,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:46,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136175740] [2022-11-16 12:29:46,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136175740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:46,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:46,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:29:46,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629437610] [2022-11-16 12:29:46,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:46,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:46,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:46,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:46,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:46,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 253 [2022-11-16 12:29:46,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 269 transitions, 837 flow. Second operand has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:46,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:46,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 253 [2022-11-16 12:29:46,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:29:49,724 INFO L130 PetriNetUnfolder]: 3830/10945 cut-off events. [2022-11-16 12:29:49,724 INFO L131 PetriNetUnfolder]: For 732/1299 co-relation queries the response was YES. [2022-11-16 12:29:49,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20190 conditions, 10945 events. 3830/10945 cut-off events. For 732/1299 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 112665 event pairs, 2562 based on Foata normal form. 434/9216 useless extension candidates. Maximal degree in co-relation 4070. Up to 3487 conditions per place. [2022-11-16 12:29:49,868 INFO L137 encePairwiseOnDemand]: 247/253 looper letters, 46 selfloop transitions, 4 changer transitions 0/298 dead transitions. [2022-11-16 12:29:49,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 298 transitions, 1018 flow [2022-11-16 12:29:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:29:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:29:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1137 transitions. [2022-11-16 12:29:49,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8988142292490119 [2022-11-16 12:29:49,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1137 transitions. [2022-11-16 12:29:49,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1137 transitions. [2022-11-16 12:29:49,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:29:49,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1137 transitions. [2022-11-16 12:29:49,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.4) internal successors, (1137), 5 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:49,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:49,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:49,883 INFO L175 Difference]: Start difference. First operand has 230 places, 269 transitions, 837 flow. Second operand 5 states and 1137 transitions. [2022-11-16 12:29:49,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 298 transitions, 1018 flow [2022-11-16 12:29:49,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 298 transitions, 1016 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:29:49,894 INFO L231 Difference]: Finished difference. Result has 236 places, 272 transitions, 865 flow [2022-11-16 12:29:49,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=865, PETRI_PLACES=236, PETRI_TRANSITIONS=272} [2022-11-16 12:29:49,895 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 16 predicate places. [2022-11-16 12:29:49,895 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 272 transitions, 865 flow [2022-11-16 12:29:49,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:49,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:49,896 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:49,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:29:49,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1428978962, now seen corresponding path program 1 times [2022-11-16 12:29:49,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:49,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057925184] [2022-11-16 12:29:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:49,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057925184] [2022-11-16 12:29:50,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057925184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:50,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:50,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:29:50,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530993571] [2022-11-16 12:29:50,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:50,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:50,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:50,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 253 [2022-11-16 12:29:50,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 272 transitions, 865 flow. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:50,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:50,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 253 [2022-11-16 12:29:50,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:29:52,088 INFO L130 PetriNetUnfolder]: 1786/6759 cut-off events. [2022-11-16 12:29:52,089 INFO L131 PetriNetUnfolder]: For 809/928 co-relation queries the response was YES. [2022-11-16 12:29:52,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10204 conditions, 6759 events. 1786/6759 cut-off events. For 809/928 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 67075 event pairs, 707 based on Foata normal form. 14/5191 useless extension candidates. Maximal degree in co-relation 6695. Up to 1695 conditions per place. [2022-11-16 12:29:52,172 INFO L137 encePairwiseOnDemand]: 247/253 looper letters, 33 selfloop transitions, 4 changer transitions 0/289 dead transitions. [2022-11-16 12:29:52,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 289 transitions, 983 flow [2022-11-16 12:29:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:29:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:29:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1134 transitions. [2022-11-16 12:29:52,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8964426877470356 [2022-11-16 12:29:52,179 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1134 transitions. [2022-11-16 12:29:52,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1134 transitions. [2022-11-16 12:29:52,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:29:52,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1134 transitions. [2022-11-16 12:29:52,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 226.8) internal successors, (1134), 5 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:52,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:52,200 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:52,201 INFO L175 Difference]: Start difference. First operand has 236 places, 272 transitions, 865 flow. Second operand 5 states and 1134 transitions. [2022-11-16 12:29:52,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 289 transitions, 983 flow [2022-11-16 12:29:52,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 289 transitions, 981 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:29:52,209 INFO L231 Difference]: Finished difference. Result has 242 places, 274 transitions, 889 flow [2022-11-16 12:29:52,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=889, PETRI_PLACES=242, PETRI_TRANSITIONS=274} [2022-11-16 12:29:52,223 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 22 predicate places. [2022-11-16 12:29:52,223 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 274 transitions, 889 flow [2022-11-16 12:29:52,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:52,224 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:52,225 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:52,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:29:52,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1283058024, now seen corresponding path program 1 times [2022-11-16 12:29:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:52,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567007616] [2022-11-16 12:29:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:52,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:52,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567007616] [2022-11-16 12:29:52,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567007616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:52,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224035277] [2022-11-16 12:29:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:52,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:52,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:52,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:52,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:29:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:52,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:29:52,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:29:52,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:29:52,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224035277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:52,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:29:52,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2022-11-16 12:29:52,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802372516] [2022-11-16 12:29:52,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:52,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:29:52,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:52,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:29:52,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:29:52,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 253 [2022-11-16 12:29:52,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 274 transitions, 889 flow. Second operand has 7 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:52,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:52,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 253 [2022-11-16 12:29:52,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:29:56,849 INFO L130 PetriNetUnfolder]: 5745/15666 cut-off events. [2022-11-16 12:29:56,850 INFO L131 PetriNetUnfolder]: For 5529/5529 co-relation queries the response was YES. [2022-11-16 12:29:56,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30824 conditions, 15666 events. 5745/15666 cut-off events. For 5529/5529 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 162474 event pairs, 4622 based on Foata normal form. 0/12567 useless extension candidates. Maximal degree in co-relation 17756. Up to 7446 conditions per place. [2022-11-16 12:29:57,021 INFO L137 encePairwiseOnDemand]: 234/253 looper letters, 164 selfloop transitions, 43 changer transitions 0/378 dead transitions. [2022-11-16 12:29:57,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 378 transitions, 1660 flow [2022-11-16 12:29:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:29:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 12:29:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2149 transitions. [2022-11-16 12:29:57,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7721882860222781 [2022-11-16 12:29:57,028 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2149 transitions. [2022-11-16 12:29:57,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2149 transitions. [2022-11-16 12:29:57,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:29:57,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2149 transitions. [2022-11-16 12:29:57,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.36363636363637) internal successors, (2149), 11 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:57,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:57,043 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:57,044 INFO L175 Difference]: Start difference. First operand has 242 places, 274 transitions, 889 flow. Second operand 11 states and 2149 transitions. [2022-11-16 12:29:57,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 378 transitions, 1660 flow [2022-11-16 12:29:57,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 378 transitions, 1652 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:29:57,114 INFO L231 Difference]: Finished difference. Result has 253 places, 291 transitions, 1071 flow [2022-11-16 12:29:57,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1071, PETRI_PLACES=253, PETRI_TRANSITIONS=291} [2022-11-16 12:29:57,115 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 33 predicate places. [2022-11-16 12:29:57,116 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 291 transitions, 1071 flow [2022-11-16 12:29:57,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:57,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:29:57,117 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:57,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:57,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:57,325 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:29:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1589026149, now seen corresponding path program 1 times [2022-11-16 12:29:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:57,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444858994] [2022-11-16 12:29:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:57,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444858994] [2022-11-16 12:29:57,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444858994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:29:57,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:29:57,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:29:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105610928] [2022-11-16 12:29:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:29:57,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:29:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:29:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:29:57,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 253 [2022-11-16 12:29:57,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 291 transitions, 1071 flow. Second operand has 4 states, 4 states have (on average 220.25) internal successors, (881), 4 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:57,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:29:57,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 253 [2022-11-16 12:29:57,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:00,939 INFO L130 PetriNetUnfolder]: 4373/13215 cut-off events. [2022-11-16 12:30:00,939 INFO L131 PetriNetUnfolder]: For 3651/4079 co-relation queries the response was YES. [2022-11-16 12:30:01,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24588 conditions, 13215 events. 4373/13215 cut-off events. For 3651/4079 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 147780 event pairs, 2096 based on Foata normal form. 378/11321 useless extension candidates. Maximal degree in co-relation 15646. Up to 4084 conditions per place. [2022-11-16 12:30:01,078 INFO L137 encePairwiseOnDemand]: 247/253 looper letters, 40 selfloop transitions, 4 changer transitions 0/315 dead transitions. [2022-11-16 12:30:01,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 315 transitions, 1225 flow [2022-11-16 12:30:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:30:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:30:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1136 transitions. [2022-11-16 12:30:01,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8980237154150198 [2022-11-16 12:30:01,083 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1136 transitions. [2022-11-16 12:30:01,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1136 transitions. [2022-11-16 12:30:01,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:01,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1136 transitions. [2022-11-16 12:30:01,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:01,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:01,091 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:01,091 INFO L175 Difference]: Start difference. First operand has 253 places, 291 transitions, 1071 flow. Second operand 5 states and 1136 transitions. [2022-11-16 12:30:01,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 315 transitions, 1225 flow [2022-11-16 12:30:01,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 315 transitions, 1220 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:30:01,123 INFO L231 Difference]: Finished difference. Result has 258 places, 294 transitions, 1096 flow [2022-11-16 12:30:01,124 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1096, PETRI_PLACES=258, PETRI_TRANSITIONS=294} [2022-11-16 12:30:01,125 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 38 predicate places. [2022-11-16 12:30:01,125 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 294 transitions, 1096 flow [2022-11-16 12:30:01,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.25) internal successors, (881), 4 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:01,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:01,126 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:01,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:30:01,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:30:01,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:01,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1257883517, now seen corresponding path program 1 times [2022-11-16 12:30:01,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:01,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818590768] [2022-11-16 12:30:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:01,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:01,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:01,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818590768] [2022-11-16 12:30:01,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818590768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:01,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271499217] [2022-11-16 12:30:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:01,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:01,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:01,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:30:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:01,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:30:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:30:01,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:01,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271499217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:01,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:01,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-16 12:30:01,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076113022] [2022-11-16 12:30:01,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:01,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:01,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:30:01,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 253 [2022-11-16 12:30:01,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 294 transitions, 1096 flow. Second operand has 7 states, 7 states have (on average 184.85714285714286) internal successors, (1294), 7 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:01,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:01,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 253 [2022-11-16 12:30:01,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:10,762 INFO L130 PetriNetUnfolder]: 13235/35794 cut-off events. [2022-11-16 12:30:10,762 INFO L131 PetriNetUnfolder]: For 12092/12894 co-relation queries the response was YES. [2022-11-16 12:30:11,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74567 conditions, 35794 events. 13235/35794 cut-off events. For 12092/12894 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 418593 event pairs, 12218 based on Foata normal form. 196/31696 useless extension candidates. Maximal degree in co-relation 46687. Up to 18948 conditions per place. [2022-11-16 12:30:11,129 INFO L137 encePairwiseOnDemand]: 234/253 looper letters, 158 selfloop transitions, 43 changer transitions 4/379 dead transitions. [2022-11-16 12:30:11,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 379 transitions, 1790 flow [2022-11-16 12:30:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:30:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 12:30:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2125 transitions. [2022-11-16 12:30:11,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7635644987423643 [2022-11-16 12:30:11,136 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2125 transitions. [2022-11-16 12:30:11,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2125 transitions. [2022-11-16 12:30:11,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:11,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2125 transitions. [2022-11-16 12:30:11,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 193.1818181818182) internal successors, (2125), 11 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:11,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:11,151 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:11,152 INFO L175 Difference]: Start difference. First operand has 258 places, 294 transitions, 1096 flow. Second operand 11 states and 2125 transitions. [2022-11-16 12:30:11,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 379 transitions, 1790 flow [2022-11-16 12:30:11,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 379 transitions, 1788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:30:11,362 INFO L231 Difference]: Finished difference. Result has 269 places, 296 transitions, 1196 flow [2022-11-16 12:30:11,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1196, PETRI_PLACES=269, PETRI_TRANSITIONS=296} [2022-11-16 12:30:11,363 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 49 predicate places. [2022-11-16 12:30:11,364 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 296 transitions, 1196 flow [2022-11-16 12:30:11,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.85714285714286) internal successors, (1294), 7 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:11,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:11,365 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:11,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:11,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:30:11,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:30:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1435827169, now seen corresponding path program 1 times [2022-11-16 12:30:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:11,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582094692] [2022-11-16 12:30:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:11,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:11,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:11,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582094692] [2022-11-16 12:30:11,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582094692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:11,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387044910] [2022-11-16 12:30:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:11,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:11,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:11,775 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:11,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:30:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:30:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:30:12,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:12,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387044910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:12,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:12,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-16 12:30:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627352554] [2022-11-16 12:30:12,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:12,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:12,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:12,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:30:12,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 253 [2022-11-16 12:30:12,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 296 transitions, 1196 flow. Second operand has 7 states, 7 states have (on average 186.14285714285714) internal successors, (1303), 7 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:12,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:12,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 253 [2022-11-16 12:30:12,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:19,054 INFO L130 PetriNetUnfolder]: 11068/25168 cut-off events. [2022-11-16 12:30:19,054 INFO L131 PetriNetUnfolder]: For 14693/14819 co-relation queries the response was YES. [2022-11-16 12:30:19,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54977 conditions, 25168 events. 11068/25168 cut-off events. For 14693/14819 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 266604 event pairs, 9712 based on Foata normal form. 126/22194 useless extension candidates. Maximal degree in co-relation 31287. Up to 15696 conditions per place. [2022-11-16 12:30:19,325 INFO L137 encePairwiseOnDemand]: 234/253 looper letters, 84 selfloop transitions, 24 changer transitions 92/373 dead transitions. [2022-11-16 12:30:19,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 373 transitions, 1854 flow [2022-11-16 12:30:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:30:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 12:30:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2127 transitions. [2022-11-16 12:30:19,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7642831476823572 [2022-11-16 12:30:19,332 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2127 transitions. [2022-11-16 12:30:19,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2127 transitions. [2022-11-16 12:30:19,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:19,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2127 transitions. [2022-11-16 12:30:19,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 193.36363636363637) internal successors, (2127), 11 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:19,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:19,346 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:19,347 INFO L175 Difference]: Start difference. First operand has 269 places, 296 transitions, 1196 flow. Second operand 11 states and 2127 transitions. [2022-11-16 12:30:19,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 373 transitions, 1854 flow [2022-11-16 12:30:19,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 373 transitions, 1814 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:30:19,489 INFO L231 Difference]: Finished difference. Result has 278 places, 275 transitions, 1047 flow [2022-11-16 12:30:19,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1047, PETRI_PLACES=278, PETRI_TRANSITIONS=275} [2022-11-16 12:30:19,490 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 58 predicate places. [2022-11-16 12:30:19,490 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 275 transitions, 1047 flow [2022-11-16 12:30:19,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 186.14285714285714) internal successors, (1303), 7 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:19,491 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:19,491 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:19,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:19,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:19,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:30:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1752564407, now seen corresponding path program 1 times [2022-11-16 12:30:19,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025517737] [2022-11-16 12:30:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:19,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:30:19,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:19,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025517737] [2022-11-16 12:30:19,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025517737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:19,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596313632] [2022-11-16 12:30:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:19,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:19,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:19,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:19,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:30:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:20,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:30:20,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:30:20,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:20,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596313632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:20,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:20,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 12:30:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145326155] [2022-11-16 12:30:20,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:20,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:20,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 253 [2022-11-16 12:30:20,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 275 transitions, 1047 flow. Second operand has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:20,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:20,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 253 [2022-11-16 12:30:20,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:21,720 INFO L130 PetriNetUnfolder]: 1855/6810 cut-off events. [2022-11-16 12:30:21,720 INFO L131 PetriNetUnfolder]: For 2343/2421 co-relation queries the response was YES. [2022-11-16 12:30:21,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12963 conditions, 6810 events. 1855/6810 cut-off events. For 2343/2421 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 70094 event pairs, 648 based on Foata normal form. 66/6150 useless extension candidates. Maximal degree in co-relation 12450. Up to 1422 conditions per place. [2022-11-16 12:30:21,796 INFO L137 encePairwiseOnDemand]: 248/253 looper letters, 21 selfloop transitions, 5 changer transitions 0/279 dead transitions. [2022-11-16 12:30:21,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 279 transitions, 1109 flow [2022-11-16 12:30:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:30:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:30:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 901 transitions. [2022-11-16 12:30:21,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8903162055335968 [2022-11-16 12:30:21,801 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 901 transitions. [2022-11-16 12:30:21,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 901 transitions. [2022-11-16 12:30:21,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:21,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 901 transitions. [2022-11-16 12:30:21,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:21,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:21,809 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:21,809 INFO L175 Difference]: Start difference. First operand has 278 places, 275 transitions, 1047 flow. Second operand 4 states and 901 transitions. [2022-11-16 12:30:21,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 279 transitions, 1109 flow [2022-11-16 12:30:21,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 279 transitions, 932 flow, removed 10 selfloop flow, removed 18 redundant places. [2022-11-16 12:30:21,840 INFO L231 Difference]: Finished difference. Result has 247 places, 273 transitions, 872 flow [2022-11-16 12:30:21,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=872, PETRI_PLACES=247, PETRI_TRANSITIONS=273} [2022-11-16 12:30:21,842 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 27 predicate places. [2022-11-16 12:30:21,842 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 273 transitions, 872 flow [2022-11-16 12:30:21,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:21,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:21,844 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:21,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:30:22,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:30:22,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:30:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:22,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1752564408, now seen corresponding path program 1 times [2022-11-16 12:30:22,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:22,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113238727] [2022-11-16 12:30:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:30:22,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:22,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113238727] [2022-11-16 12:30:22,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113238727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:22,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901497245] [2022-11-16 12:30:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:22,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:22,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:22,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:30:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:22,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:30:22,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:30:22,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:30:22,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901497245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:22,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:22,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-16 12:30:22,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053022155] [2022-11-16 12:30:22,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:30:22,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:30:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:30:22,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 253 [2022-11-16 12:30:22,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 273 transitions, 872 flow. Second operand has 10 states, 10 states have (on average 221.9) internal successors, (2219), 10 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:22,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:22,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 253 [2022-11-16 12:30:22,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:24,347 INFO L130 PetriNetUnfolder]: 2503/6300 cut-off events. [2022-11-16 12:30:24,347 INFO L131 PetriNetUnfolder]: For 2166/2250 co-relation queries the response was YES. [2022-11-16 12:30:24,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12813 conditions, 6300 events. 2503/6300 cut-off events. For 2166/2250 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 62586 event pairs, 438 based on Foata normal form. 192/5508 useless extension candidates. Maximal degree in co-relation 8633. Up to 1224 conditions per place. [2022-11-16 12:30:24,397 INFO L137 encePairwiseOnDemand]: 246/253 looper letters, 51 selfloop transitions, 9 changer transitions 0/313 dead transitions. [2022-11-16 12:30:24,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 313 transitions, 1106 flow [2022-11-16 12:30:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:30:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:30:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2034 transitions. [2022-11-16 12:30:24,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8932806324110671 [2022-11-16 12:30:24,400 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2034 transitions. [2022-11-16 12:30:24,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2034 transitions. [2022-11-16 12:30:24,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:24,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2034 transitions. [2022-11-16 12:30:24,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:24,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:24,409 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:24,410 INFO L175 Difference]: Start difference. First operand has 247 places, 273 transitions, 872 flow. Second operand 9 states and 2034 transitions. [2022-11-16 12:30:24,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 313 transitions, 1106 flow [2022-11-16 12:30:24,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 313 transitions, 1092 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 12:30:24,421 INFO L231 Difference]: Finished difference. Result has 257 places, 277 transitions, 918 flow [2022-11-16 12:30:24,422 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=918, PETRI_PLACES=257, PETRI_TRANSITIONS=277} [2022-11-16 12:30:24,423 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 37 predicate places. [2022-11-16 12:30:24,423 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 277 transitions, 918 flow [2022-11-16 12:30:24,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 221.9) internal successors, (2219), 10 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:24,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:24,424 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:24,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:30:24,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:30:24,630 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:30:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:24,630 INFO L85 PathProgramCache]: Analyzing trace with hash 406972973, now seen corresponding path program 1 times [2022-11-16 12:30:24,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:24,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981700120] [2022-11-16 12:30:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:24,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:30:24,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:24,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981700120] [2022-11-16 12:30:24,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981700120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:24,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357211037] [2022-11-16 12:30:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:24,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:24,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:24,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:24,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:30:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:30:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:25,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357211037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:25,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:25,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 23 [2022-11-16 12:30:25,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454662045] [2022-11-16 12:30:25,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:25,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:30:25,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:25,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:30:25,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:30:25,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 253 [2022-11-16 12:30:25,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 277 transitions, 918 flow. Second operand has 23 states, 23 states have (on average 166.3913043478261) internal successors, (3827), 23 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:25,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:25,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 253 [2022-11-16 12:30:25,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:49,188 INFO L130 PetriNetUnfolder]: 47915/99446 cut-off events. [2022-11-16 12:30:49,188 INFO L131 PetriNetUnfolder]: For 36098/36679 co-relation queries the response was YES. [2022-11-16 12:30:50,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215325 conditions, 99446 events. 47915/99446 cut-off events. For 36098/36679 co-relation queries the response was YES. Maximal size of possible extension queue 2328. Compared 1158398 event pairs, 12712 based on Foata normal form. 586/81892 useless extension candidates. Maximal degree in co-relation 133685. Up to 15122 conditions per place. [2022-11-16 12:30:50,626 INFO L137 encePairwiseOnDemand]: 219/253 looper letters, 407 selfloop transitions, 92 changer transitions 0/640 dead transitions. [2022-11-16 12:30:50,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 640 transitions, 3190 flow [2022-11-16 12:30:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:30:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-16 12:30:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5849 transitions. [2022-11-16 12:30:50,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6799581492676122 [2022-11-16 12:30:50,637 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5849 transitions. [2022-11-16 12:30:50,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5849 transitions. [2022-11-16 12:30:50,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:50,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5849 transitions. [2022-11-16 12:30:50,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 172.02941176470588) internal successors, (5849), 34 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:50,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 253.0) internal successors, (8855), 35 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:50,672 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 253.0) internal successors, (8855), 35 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:50,672 INFO L175 Difference]: Start difference. First operand has 257 places, 277 transitions, 918 flow. Second operand 34 states and 5849 transitions. [2022-11-16 12:30:50,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 640 transitions, 3190 flow [2022-11-16 12:30:51,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 640 transitions, 3176 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-16 12:30:51,737 INFO L231 Difference]: Finished difference. Result has 295 places, 328 transitions, 1438 flow [2022-11-16 12:30:51,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1438, PETRI_PLACES=295, PETRI_TRANSITIONS=328} [2022-11-16 12:30:51,738 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 75 predicate places. [2022-11-16 12:30:51,739 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 328 transitions, 1438 flow [2022-11-16 12:30:51,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 166.3913043478261) internal successors, (3827), 23 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:51,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:51,740 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:51,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:51,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bee84eb-d25a-45d4-bdf4-90abfa31d78f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:30:51,941 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 12:30:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1225693794, now seen corresponding path program 1 times [2022-11-16 12:30:51,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:51,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412859196] [2022-11-16 12:30:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:30:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412859196] [2022-11-16 12:30:52,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412859196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:52,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:52,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:30:52,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801911633] [2022-11-16 12:30:52,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:52,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:52,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:30:52,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 253 [2022-11-16 12:30:52,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 328 transitions, 1438 flow. Second operand has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:52,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:52,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 253 [2022-11-16 12:30:52,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand