./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.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_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/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_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/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_3e9a57bf-c249-439a-86c3-355bebf5ba17/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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- 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 11:03:45,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:03:45,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:03:45,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:03:45,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:03:45,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:03:45,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:03:45,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:03:45,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:03:45,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:03:45,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:03:45,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:03:45,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:03:45,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:03:45,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:03:45,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:03:45,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:03:45,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:03:45,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:03:45,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:03:45,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:03:45,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:03:45,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:03:45,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:03:45,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:03:45,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:03:45,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:03:45,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:03:45,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:03:45,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:03:45,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:03:45,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:03:45,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:03:45,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:03:45,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:03:45,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:03:45,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:03:45,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:03:45,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:03:45,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:03:45,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:03:45,599 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:03:45,637 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:03:45,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:03:45,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:03:45,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:03:45,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:03:45,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:03:45,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:03:45,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:03:45,642 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:03:45,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:03:45,644 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:03:45,644 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:03:45,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:03:45,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:03:45,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:03:45,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:03:45,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:03:45,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:03:45,646 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:03:45,646 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:03:45,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:03:45,646 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:03:45,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:03:45,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:03:45,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:03:45,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:03:45,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:03:45,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:03:45,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:03:45,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:03:45,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:03:45,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:03:45,651 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:03:45,651 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:03:45,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:03:45,652 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_3e9a57bf-c249-439a-86c3-355bebf5ba17/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2022-11-16 11:03:45,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:03:45,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:03:45,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:03:45,979 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:03:45,980 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:03:45,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-16 11:03:46,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/data/12f39a68c/78b0f50c20764ab8a8523df07f55d646/FLAGa33daab66 [2022-11-16 11:03:46,678 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:03:46,679 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-16 11:03:46,690 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/data/12f39a68c/78b0f50c20764ab8a8523df07f55d646/FLAGa33daab66 [2022-11-16 11:03:47,006 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/data/12f39a68c/78b0f50c20764ab8a8523df07f55d646 [2022-11-16 11:03:47,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:03:47,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:03:47,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:03:47,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:03:47,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:03:47,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6ba0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47, skipping insertion in model container [2022-11-16 11:03:47,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:03:47,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:03:47,293 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_3e9a57bf-c249-439a-86c3-355bebf5ba17/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-16 11:03:47,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:03:47,308 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:03:47,336 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_3e9a57bf-c249-439a-86c3-355bebf5ba17/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-16 11:03:47,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:03:47,354 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:03:47,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47 WrapperNode [2022-11-16 11:03:47,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:03:47,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:03:47,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:03:47,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:03:47,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,407 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 271 [2022-11-16 11:03:47,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:03:47,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:03:47,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:03:47,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:03:47,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,468 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:03:47,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:03:47,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:03:47,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:03:47,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (1/1) ... [2022-11-16 11:03:47,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:03:47,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:47,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:03:47,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:03:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:03:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:03:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:03:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:03:47,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:03:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:03:47,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:03:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:03:47,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:03:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:03:47,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:03:47,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:03:47,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:03:47,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:03:47,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:03:47,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:03:47,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:03:47,576 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 11:03:47,732 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:03:47,734 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:03:48,338 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:03:48,561 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:03:48,561 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 11:03:48,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:03:48 BoogieIcfgContainer [2022-11-16 11:03:48,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:03:48,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:03:48,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:03:48,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:03:48,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:03:47" (1/3) ... [2022-11-16 11:03:48,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f33ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:03:48, skipping insertion in model container [2022-11-16 11:03:48,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:47" (2/3) ... [2022-11-16 11:03:48,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f33ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:03:48, skipping insertion in model container [2022-11-16 11:03:48,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:03:48" (3/3) ... [2022-11-16 11:03:48,574 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2022-11-16 11:03:48,582 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:03:48,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:03:48,596 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-16 11:03:48,596 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:03:48,760 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:03:48,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 250 transitions, 524 flow [2022-11-16 11:03:48,978 INFO L130 PetriNetUnfolder]: 18/247 cut-off events. [2022-11-16 11:03:48,978 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:03:48,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 247 events. 18/247 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2022-11-16 11:03:48,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 250 transitions, 524 flow [2022-11-16 11:03:48,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 227 transitions, 472 flow [2022-11-16 11:03:49,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:03:49,023 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;@6b5f46d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:03:49,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-16 11:03:49,037 INFO L130 PetriNetUnfolder]: 3/73 cut-off events. [2022-11-16 11:03:49,038 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:03:49,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:03:49,039 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:49,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:03:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:49,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1046920266, now seen corresponding path program 1 times [2022-11-16 11:03:49,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:49,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411113277] [2022-11-16 11:03:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:49,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:49,587 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 11:03:49,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:49,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411113277] [2022-11-16 11:03:49,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411113277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:49,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:49,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:03:49,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749928904] [2022-11-16 11:03:49,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:49,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:49,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:49,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:49,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 250 [2022-11-16 11:03:49,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 227 transitions, 472 flow. Second operand has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states 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 11:03:49,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:03:49,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 250 [2022-11-16 11:03:49,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:03:50,622 INFO L130 PetriNetUnfolder]: 793/2013 cut-off events. [2022-11-16 11:03:50,622 INFO L131 PetriNetUnfolder]: For 232/232 co-relation queries the response was YES. [2022-11-16 11:03:50,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 2013 events. 793/2013 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13057 event pairs, 472 based on Foata normal form. 252/1401 useless extension candidates. Maximal degree in co-relation 1508. Up to 588 conditions per place. [2022-11-16 11:03:50,655 INFO L137 encePairwiseOnDemand]: 220/250 looper letters, 68 selfloop transitions, 9 changer transitions 5/245 dead transitions. [2022-11-16 11:03:50,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 245 transitions, 680 flow [2022-11-16 11:03:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:03:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1056 transitions. [2022-11-16 11:03:50,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8448 [2022-11-16 11:03:50,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1056 transitions. [2022-11-16 11:03:50,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1056 transitions. [2022-11-16 11:03:50,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:03:50,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1056 transitions. [2022-11-16 11:03:50,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states 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 11:03:50,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 11:03:50,711 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 11:03:50,713 INFO L175 Difference]: Start difference. First operand has 220 places, 227 transitions, 472 flow. Second operand 5 states and 1056 transitions. [2022-11-16 11:03:50,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 245 transitions, 680 flow [2022-11-16 11:03:50,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 245 transitions, 656 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:03:50,736 INFO L231 Difference]: Finished difference. Result has 216 places, 212 transitions, 483 flow [2022-11-16 11:03:50,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=483, PETRI_PLACES=216, PETRI_TRANSITIONS=212} [2022-11-16 11:03:50,747 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, -4 predicate places. [2022-11-16 11:03:50,749 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 212 transitions, 483 flow [2022-11-16 11:03:50,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states 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 11:03:50,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:03:50,751 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] [2022-11-16 11:03:50,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:03:50,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:03:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1438837809, now seen corresponding path program 1 times [2022-11-16 11:03:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:50,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944278440] [2022-11-16 11:03:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:50,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:51,011 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 11:03:51,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:51,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944278440] [2022-11-16 11:03:51,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944278440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:03:51,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601322903] [2022-11-16 11:03:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:51,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:51,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:51,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:51,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:03:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:51,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:03:51,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:51,278 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 11:03:51,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:03:51,370 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 11:03:51,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601322903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:03:51,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:03:51,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:03:51,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385633027] [2022-11-16 11:03:51,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:03:51,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:03:51,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:03:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:03:51,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 250 [2022-11-16 11:03:51,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 212 transitions, 483 flow. Second operand has 12 states, 12 states have (on average 191.66666666666666) internal successors, (2300), 12 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states 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 11:03:51,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:03:51,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 250 [2022-11-16 11:03:51,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:03:53,169 INFO L130 PetriNetUnfolder]: 1981/4903 cut-off events. [2022-11-16 11:03:53,170 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-11-16 11:03:53,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8072 conditions, 4903 events. 1981/4903 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 36477 event pairs, 1180 based on Foata normal form. 6/2774 useless extension candidates. Maximal degree in co-relation 6236. Up to 581 conditions per place. [2022-11-16 11:03:53,224 INFO L137 encePairwiseOnDemand]: 235/250 looper letters, 146 selfloop transitions, 40 changer transitions 0/349 dead transitions. [2022-11-16 11:03:53,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 349 transitions, 1203 flow [2022-11-16 11:03:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:03:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:03:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3594 transitions. [2022-11-16 11:03:53,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7986666666666666 [2022-11-16 11:03:53,236 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3594 transitions. [2022-11-16 11:03:53,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3594 transitions. [2022-11-16 11:03:53,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:03:53,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3594 transitions. [2022-11-16 11:03:53,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 199.66666666666666) internal successors, (3594), 18 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states 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 11:03:53,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states 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 11:03:53,272 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states 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 11:03:53,272 INFO L175 Difference]: Start difference. First operand has 216 places, 212 transitions, 483 flow. Second operand 18 states and 3594 transitions. [2022-11-16 11:03:53,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 349 transitions, 1203 flow [2022-11-16 11:03:53,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 349 transitions, 1198 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:03:53,282 INFO L231 Difference]: Finished difference. Result has 231 places, 239 transitions, 716 flow [2022-11-16 11:03:53,283 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=716, PETRI_PLACES=231, PETRI_TRANSITIONS=239} [2022-11-16 11:03:53,284 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 11 predicate places. [2022-11-16 11:03:53,284 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 239 transitions, 716 flow [2022-11-16 11:03:53,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 191.66666666666666) internal successors, (2300), 12 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states 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 11:03:53,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:03:53,286 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:53,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:53,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:53,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:03:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1654298436, now seen corresponding path program 1 times [2022-11-16 11:03:53,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:53,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104039445] [2022-11-16 11:03:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:53,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:53,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104039445] [2022-11-16 11:03:53,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104039445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:03:53,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547812285] [2022-11-16 11:03:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:53,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:53,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:53,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:53,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:03:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:03:53,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:53,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:53,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547812285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:53,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:03:53,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:03:53,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683258696] [2022-11-16 11:03:53,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:53,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:53,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:03:53,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 250 [2022-11-16 11:03:53,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 239 transitions, 716 flow. Second operand has 6 states, 6 states have (on average 191.33333333333334) internal successors, (1148), 6 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 11:03:53,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:03:53,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 250 [2022-11-16 11:03:53,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:03:55,333 INFO L130 PetriNetUnfolder]: 1981/4895 cut-off events. [2022-11-16 11:03:55,333 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2022-11-16 11:03:55,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8109 conditions, 4895 events. 1981/4895 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 36517 event pairs, 1180 based on Foata normal form. 8/2768 useless extension candidates. Maximal degree in co-relation 6458. Up to 2280 conditions per place. [2022-11-16 11:03:55,383 INFO L137 encePairwiseOnDemand]: 239/250 looper letters, 69 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2022-11-16 11:03:55,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 259 transitions, 920 flow [2022-11-16 11:03:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:03:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:03:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1400 transitions. [2022-11-16 11:03:55,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-11-16 11:03:55,389 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1400 transitions. [2022-11-16 11:03:55,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1400 transitions. [2022-11-16 11:03:55,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:03:55,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1400 transitions. [2022-11-16 11:03:55,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.0) internal successors, (1400), 7 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states 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 11:03:55,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 11:03:55,400 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 11:03:55,400 INFO L175 Difference]: Start difference. First operand has 231 places, 239 transitions, 716 flow. Second operand 7 states and 1400 transitions. [2022-11-16 11:03:55,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 259 transitions, 920 flow [2022-11-16 11:03:55,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 259 transitions, 846 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-16 11:03:55,410 INFO L231 Difference]: Finished difference. Result has 226 places, 231 transitions, 642 flow [2022-11-16 11:03:55,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=642, PETRI_PLACES=226, PETRI_TRANSITIONS=231} [2022-11-16 11:03:55,411 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 6 predicate places. [2022-11-16 11:03:55,411 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 231 transitions, 642 flow [2022-11-16 11:03:55,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.33333333333334) internal successors, (1148), 6 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 11:03:55,412 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:03:55,413 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:55,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:55,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:55,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:03:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash 518427638, now seen corresponding path program 2 times [2022-11-16 11:03:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:55,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897815421] [2022-11-16 11:03:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897815421] [2022-11-16 11:03:56,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897815421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:03:56,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492061231] [2022-11-16 11:03:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:03:56,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:56,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:56,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:56,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:03:56,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:03:56,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:03:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:03:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:03:56,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:03:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:03:56,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492061231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:03:56,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:03:56,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 11:03:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572140454] [2022-11-16 11:03:56,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:03:56,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:03:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:03:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:03:56,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 250 [2022-11-16 11:03:56,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 231 transitions, 642 flow. Second operand has 18 states, 18 states have (on average 177.61111111111111) internal successors, (3197), 18 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states 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 11:03:56,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:03:56,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 250 [2022-11-16 11:03:56,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:03:58,897 INFO L130 PetriNetUnfolder]: 1317/4211 cut-off events. [2022-11-16 11:03:58,898 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2022-11-16 11:03:58,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6592 conditions, 4211 events. 1317/4211 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 32155 event pairs, 854 based on Foata normal form. 4/2899 useless extension candidates. Maximal degree in co-relation 5328. Up to 343 conditions per place. [2022-11-16 11:03:58,933 INFO L137 encePairwiseOnDemand]: 227/250 looper letters, 177 selfloop transitions, 65 changer transitions 0/390 dead transitions. [2022-11-16 11:03:58,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 390 transitions, 1539 flow [2022-11-16 11:03:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:03:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:03:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 8793 transitions. [2022-11-16 11:03:58,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7177959183673469 [2022-11-16 11:03:58,956 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 8793 transitions. [2022-11-16 11:03:58,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 8793 transitions. [2022-11-16 11:03:58,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:03:58,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 8793 transitions. [2022-11-16 11:03:58,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 179.44897959183675) internal successors, (8793), 49 states have internal predecessors, (8793), 0 states have call successors, (0), 0 states 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 11:03:59,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 250.0) internal successors, (12500), 50 states have internal predecessors, (12500), 0 states have call successors, (0), 0 states 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 11:03:59,017 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 250.0) internal successors, (12500), 50 states have internal predecessors, (12500), 0 states have call successors, (0), 0 states 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 11:03:59,017 INFO L175 Difference]: Start difference. First operand has 226 places, 231 transitions, 642 flow. Second operand 49 states and 8793 transitions. [2022-11-16 11:03:59,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 390 transitions, 1539 flow [2022-11-16 11:03:59,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 390 transitions, 1496 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:03:59,029 INFO L231 Difference]: Finished difference. Result has 269 places, 253 transitions, 851 flow [2022-11-16 11:03:59,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=851, PETRI_PLACES=269, PETRI_TRANSITIONS=253} [2022-11-16 11:03:59,032 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 49 predicate places. [2022-11-16 11:03:59,032 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 253 transitions, 851 flow [2022-11-16 11:03:59,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 177.61111111111111) internal successors, (3197), 18 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states 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 11:03:59,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:03:59,052 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] [2022-11-16 11:03:59,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:59,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:59,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:03:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash 728424532, now seen corresponding path program 1 times [2022-11-16 11:03:59,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:59,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053828781] [2022-11-16 11:03:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:59,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:59,382 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 11:03:59,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053828781] [2022-11-16 11:03:59,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053828781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:59,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:59,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:03:59,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479863028] [2022-11-16 11:03:59,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:59,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:59,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:59,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 250 [2022-11-16 11:03:59,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 253 transitions, 851 flow. Second operand has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states 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 11:03:59,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:03:59,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 250 [2022-11-16 11:03:59,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:02,564 INFO L130 PetriNetUnfolder]: 6728/14172 cut-off events. [2022-11-16 11:04:02,565 INFO L131 PetriNetUnfolder]: For 460/460 co-relation queries the response was YES. [2022-11-16 11:04:02,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26087 conditions, 14172 events. 6728/14172 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 122727 event pairs, 3311 based on Foata normal form. 0/9433 useless extension candidates. Maximal degree in co-relation 25792. Up to 6091 conditions per place. [2022-11-16 11:04:02,689 INFO L137 encePairwiseOnDemand]: 244/250 looper letters, 60 selfloop transitions, 4 changer transitions 0/292 dead transitions. [2022-11-16 11:04:02,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 292 transitions, 1066 flow [2022-11-16 11:04:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:04:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:04:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1081 transitions. [2022-11-16 11:04:02,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8648 [2022-11-16 11:04:02,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1081 transitions. [2022-11-16 11:04:02,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1081 transitions. [2022-11-16 11:04:02,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:02,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1081 transitions. [2022-11-16 11:04:02,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.2) internal successors, (1081), 5 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states 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 11:04:02,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 11:04:02,699 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 11:04:02,699 INFO L175 Difference]: Start difference. First operand has 269 places, 253 transitions, 851 flow. Second operand 5 states and 1081 transitions. [2022-11-16 11:04:02,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 292 transitions, 1066 flow [2022-11-16 11:04:02,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 292 transitions, 983 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-16 11:04:02,707 INFO L231 Difference]: Finished difference. Result has 261 places, 256 transitions, 798 flow [2022-11-16 11:04:02,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=798, PETRI_PLACES=261, PETRI_TRANSITIONS=256} [2022-11-16 11:04:02,709 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 41 predicate places. [2022-11-16 11:04:02,709 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 256 transitions, 798 flow [2022-11-16 11:04:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states 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 11:04:02,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:02,709 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] [2022-11-16 11:04:02,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:04:02,710 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:02,710 INFO L85 PathProgramCache]: Analyzing trace with hash 360490906, now seen corresponding path program 1 times [2022-11-16 11:04:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356790670] [2022-11-16 11:04:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:02,931 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 11:04:02,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356790670] [2022-11-16 11:04:02,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356790670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:02,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:02,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:04:02,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034971189] [2022-11-16 11:04:02,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:02,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:04:02,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:02,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:04:02,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:04:02,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 250 [2022-11-16 11:04:02,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 256 transitions, 798 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states 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 11:04:02,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:02,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 250 [2022-11-16 11:04:02,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:03,934 INFO L130 PetriNetUnfolder]: 1422/5478 cut-off events. [2022-11-16 11:04:03,934 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2022-11-16 11:04:03,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8660 conditions, 5478 events. 1422/5478 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 49863 event pairs, 490 based on Foata normal form. 28/3910 useless extension candidates. Maximal degree in co-relation 8382. Up to 2384 conditions per place. [2022-11-16 11:04:03,974 INFO L137 encePairwiseOnDemand]: 246/250 looper letters, 22 selfloop transitions, 3 changer transitions 0/262 dead transitions. [2022-11-16 11:04:03,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 262 transitions, 862 flow [2022-11-16 11:04:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:04:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:04:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-11-16 11:04:03,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8706666666666667 [2022-11-16 11:04:03,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-11-16 11:04:03,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-11-16 11:04:03,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:03,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-11-16 11:04:03,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:03,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 11:04:03,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 11:04:03,980 INFO L175 Difference]: Start difference. First operand has 261 places, 256 transitions, 798 flow. Second operand 3 states and 653 transitions. [2022-11-16 11:04:03,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 262 transitions, 862 flow [2022-11-16 11:04:03,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 262 transitions, 860 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:04:03,988 INFO L231 Difference]: Finished difference. Result has 263 places, 258 transitions, 815 flow [2022-11-16 11:04:03,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=815, PETRI_PLACES=263, PETRI_TRANSITIONS=258} [2022-11-16 11:04:03,992 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 43 predicate places. [2022-11-16 11:04:03,992 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 258 transitions, 815 flow [2022-11-16 11:04:03,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states 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 11:04:03,993 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:03,993 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:04:03,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:04:03,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:03,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1221330777, now seen corresponding path program 1 times [2022-11-16 11:04:03,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:03,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309114922] [2022-11-16 11:04:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:03,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:04,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:04,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309114922] [2022-11-16 11:04:04,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309114922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571128557] [2022-11-16 11:04:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:04,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:04,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:04,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:04,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:04:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:04,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:04:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:04:04,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:04:04,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571128557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:04,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:04:04,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-11-16 11:04:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254354042] [2022-11-16 11:04:04,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:04,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:04:04,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:04:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:04:04,474 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 250 [2022-11-16 11:04:04,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 258 transitions, 815 flow. Second operand has 6 states, 6 states have (on average 190.5) internal successors, (1143), 6 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states 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 11:04:04,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:04,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 250 [2022-11-16 11:04:04,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:05,675 INFO L130 PetriNetUnfolder]: 1429/5922 cut-off events. [2022-11-16 11:04:05,675 INFO L131 PetriNetUnfolder]: For 1310/1646 co-relation queries the response was YES. [2022-11-16 11:04:05,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10131 conditions, 5922 events. 1429/5922 cut-off events. For 1310/1646 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 54482 event pairs, 1218 based on Foata normal form. 70/4347 useless extension candidates. Maximal degree in co-relation 9204. Up to 2463 conditions per place. [2022-11-16 11:04:05,718 INFO L137 encePairwiseOnDemand]: 239/250 looper letters, 99 selfloop transitions, 21 changer transitions 0/294 dead transitions. [2022-11-16 11:04:05,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 294 transitions, 1202 flow [2022-11-16 11:04:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:04:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:04:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1748 transitions. [2022-11-16 11:04:05,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7768888888888889 [2022-11-16 11:04:05,722 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1748 transitions. [2022-11-16 11:04:05,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1748 transitions. [2022-11-16 11:04:05,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:05,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1748 transitions. [2022-11-16 11:04:05,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.22222222222223) internal successors, (1748), 9 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states 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 11:04:05,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states 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 11:04:05,732 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states 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 11:04:05,732 INFO L175 Difference]: Start difference. First operand has 263 places, 258 transitions, 815 flow. Second operand 9 states and 1748 transitions. [2022-11-16 11:04:05,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 294 transitions, 1202 flow [2022-11-16 11:04:05,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 294 transitions, 1199 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:04:05,742 INFO L231 Difference]: Finished difference. Result has 272 places, 259 transitions, 868 flow [2022-11-16 11:04:05,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=868, PETRI_PLACES=272, PETRI_TRANSITIONS=259} [2022-11-16 11:04:05,743 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 52 predicate places. [2022-11-16 11:04:05,743 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 259 transitions, 868 flow [2022-11-16 11:04:05,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.5) internal successors, (1143), 6 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states 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 11:04:05,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:05,744 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 11:04:05,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:05,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:04:05,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:05,949 INFO L85 PathProgramCache]: Analyzing trace with hash 164841123, now seen corresponding path program 1 times [2022-11-16 11:04:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:05,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585325377] [2022-11-16 11:04:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:05,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:06,236 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 11:04:06,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:06,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585325377] [2022-11-16 11:04:06,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585325377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:06,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:06,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:04:06,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008281195] [2022-11-16 11:04:06,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:06,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:04:06,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:04:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:04:06,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 250 [2022-11-16 11:04:06,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 259 transitions, 868 flow. Second operand has 4 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states 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 11:04:06,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:06,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 250 [2022-11-16 11:04:06,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:07,605 INFO L130 PetriNetUnfolder]: 1961/6300 cut-off events. [2022-11-16 11:04:07,605 INFO L131 PetriNetUnfolder]: For 1260/1428 co-relation queries the response was YES. [2022-11-16 11:04:07,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11069 conditions, 6300 events. 1961/6300 cut-off events. For 1260/1428 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 55601 event pairs, 700 based on Foata normal form. 224/4445 useless extension candidates. Maximal degree in co-relation 10278. Up to 2425 conditions per place. [2022-11-16 11:04:07,651 INFO L137 encePairwiseOnDemand]: 244/250 looper letters, 35 selfloop transitions, 4 changer transitions 0/268 dead transitions. [2022-11-16 11:04:07,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 268 transitions, 972 flow [2022-11-16 11:04:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:04:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:04:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2022-11-16 11:04:07,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.857 [2022-11-16 11:04:07,658 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2022-11-16 11:04:07,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2022-11-16 11:04:07,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:07,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2022-11-16 11:04:07,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states 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 11:04:07,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 11:04:07,664 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 11:04:07,664 INFO L175 Difference]: Start difference. First operand has 272 places, 259 transitions, 868 flow. Second operand 4 states and 857 transitions. [2022-11-16 11:04:07,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 268 transitions, 972 flow [2022-11-16 11:04:07,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 268 transitions, 946 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:04:07,674 INFO L231 Difference]: Finished difference. Result has 271 places, 260 transitions, 860 flow [2022-11-16 11:04:07,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=860, PETRI_PLACES=271, PETRI_TRANSITIONS=260} [2022-11-16 11:04:07,678 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 51 predicate places. [2022-11-16 11:04:07,678 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 260 transitions, 860 flow [2022-11-16 11:04:07,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states 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 11:04:07,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:07,679 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:04:07,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:04:07,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1718374176, now seen corresponding path program 1 times [2022-11-16 11:04:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:07,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190034706] [2022-11-16 11:04:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:07,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:07,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190034706] [2022-11-16 11:04:07,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190034706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:07,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435197944] [2022-11-16 11:04:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:07,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:07,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:07,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:04:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:07,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:04:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:08,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:08,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435197944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:08,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:08,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-16 11:04:08,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048663101] [2022-11-16 11:04:08,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:08,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:04:08,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:08,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:04:08,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:04:08,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 250 [2022-11-16 11:04:08,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 260 transitions, 860 flow. Second operand has 19 states, 19 states have (on average 170.21052631578948) internal successors, (3234), 19 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states 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 11:04:08,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:08,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 250 [2022-11-16 11:04:08,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:15,651 INFO L130 PetriNetUnfolder]: 14897/35234 cut-off events. [2022-11-16 11:04:15,651 INFO L131 PetriNetUnfolder]: For 8224/8322 co-relation queries the response was YES. [2022-11-16 11:04:15,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75410 conditions, 35234 events. 14897/35234 cut-off events. For 8224/8322 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 373118 event pairs, 3423 based on Foata normal form. 651/26967 useless extension candidates. Maximal degree in co-relation 64613. Up to 6403 conditions per place. [2022-11-16 11:04:15,884 INFO L137 encePairwiseOnDemand]: 227/250 looper letters, 287 selfloop transitions, 54 changer transitions 15/495 dead transitions. [2022-11-16 11:04:15,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 495 transitions, 2479 flow [2022-11-16 11:04:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:04:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-16 11:04:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5038 transitions. [2022-11-16 11:04:15,894 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6948965517241379 [2022-11-16 11:04:15,894 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5038 transitions. [2022-11-16 11:04:15,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5038 transitions. [2022-11-16 11:04:15,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:15,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5038 transitions. [2022-11-16 11:04:15,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 173.72413793103448) internal successors, (5038), 29 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states 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 11:04:15,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 250.0) internal successors, (7500), 30 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states 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 11:04:15,917 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 250.0) internal successors, (7500), 30 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states 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 11:04:15,918 INFO L175 Difference]: Start difference. First operand has 271 places, 260 transitions, 860 flow. Second operand 29 states and 5038 transitions. [2022-11-16 11:04:15,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 495 transitions, 2479 flow [2022-11-16 11:04:15,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 495 transitions, 2463 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:04:15,975 INFO L231 Difference]: Finished difference. Result has 306 places, 280 transitions, 1152 flow [2022-11-16 11:04:15,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1152, PETRI_PLACES=306, PETRI_TRANSITIONS=280} [2022-11-16 11:04:15,976 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 86 predicate places. [2022-11-16 11:04:15,976 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 280 transitions, 1152 flow [2022-11-16 11:04:15,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 170.21052631578948) internal successors, (3234), 19 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states 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 11:04:15,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:15,978 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] [2022-11-16 11:04:15,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:16,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:16,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:16,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1499096793, now seen corresponding path program 1 times [2022-11-16 11:04:16,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:16,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015323810] [2022-11-16 11:04:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:16,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:16,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:16,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015323810] [2022-11-16 11:04:16,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015323810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:16,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:16,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:04:16,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250356350] [2022-11-16 11:04:16,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:16,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:04:16,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:04:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:04:16,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 250 [2022-11-16 11:04:16,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 280 transitions, 1152 flow. Second operand has 6 states, 6 states have (on average 191.5) internal successors, (1149), 6 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 11:04:16,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:16,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 250 [2022-11-16 11:04:16,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:18,997 INFO L130 PetriNetUnfolder]: 3377/12857 cut-off events. [2022-11-16 11:04:18,997 INFO L131 PetriNetUnfolder]: For 5452/6000 co-relation queries the response was YES. [2022-11-16 11:04:19,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24586 conditions, 12857 events. 3377/12857 cut-off events. For 5452/6000 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 138117 event pairs, 2316 based on Foata normal form. 284/9448 useless extension candidates. Maximal degree in co-relation 20605. Up to 5535 conditions per place. [2022-11-16 11:04:19,072 INFO L137 encePairwiseOnDemand]: 239/250 looper letters, 93 selfloop transitions, 14 changer transitions 5/294 dead transitions. [2022-11-16 11:04:19,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 294 transitions, 1450 flow [2022-11-16 11:04:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:04:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:04:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1366 transitions. [2022-11-16 11:04:19,076 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7805714285714286 [2022-11-16 11:04:19,076 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1366 transitions. [2022-11-16 11:04:19,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1366 transitions. [2022-11-16 11:04:19,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:19,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1366 transitions. [2022-11-16 11:04:19,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states 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 11:04:19,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 11:04:19,083 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 11:04:19,083 INFO L175 Difference]: Start difference. First operand has 306 places, 280 transitions, 1152 flow. Second operand 7 states and 1366 transitions. [2022-11-16 11:04:19,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 294 transitions, 1450 flow [2022-11-16 11:04:19,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 294 transitions, 1371 flow, removed 12 selfloop flow, removed 15 redundant places. [2022-11-16 11:04:19,104 INFO L231 Difference]: Finished difference. Result has 297 places, 280 transitions, 1118 flow [2022-11-16 11:04:19,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1118, PETRI_PLACES=297, PETRI_TRANSITIONS=280} [2022-11-16 11:04:19,106 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 77 predicate places. [2022-11-16 11:04:19,106 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 280 transitions, 1118 flow [2022-11-16 11:04:19,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.5) internal successors, (1149), 6 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 11:04:19,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:19,107 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:04:19,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:04:19,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 672666442, now seen corresponding path program 1 times [2022-11-16 11:04:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622264023] [2022-11-16 11:04:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:19,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:04:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:19,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622264023] [2022-11-16 11:04:19,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622264023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:19,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491639464] [2022-11-16 11:04:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:19,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:19,230 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:19,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:04:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:19,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:04:19,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:04:19,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:04:19,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491639464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:19,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:04:19,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:04:19,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557591751] [2022-11-16 11:04:19,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:19,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:04:19,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:04:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:04:19,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 250 [2022-11-16 11:04:19,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 280 transitions, 1118 flow. Second operand has 6 states, 6 states have (on average 205.33333333333334) internal successors, (1232), 6 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states 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 11:04:19,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:19,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 250 [2022-11-16 11:04:19,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:24,401 INFO L130 PetriNetUnfolder]: 13277/25887 cut-off events. [2022-11-16 11:04:24,401 INFO L131 PetriNetUnfolder]: For 12217/12217 co-relation queries the response was YES. [2022-11-16 11:04:24,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68065 conditions, 25887 events. 13277/25887 cut-off events. For 12217/12217 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 235100 event pairs, 542 based on Foata normal form. 382/19458 useless extension candidates. Maximal degree in co-relation 67794. Up to 8319 conditions per place. [2022-11-16 11:04:24,577 INFO L137 encePairwiseOnDemand]: 245/250 looper letters, 76 selfloop transitions, 12 changer transitions 0/327 dead transitions. [2022-11-16 11:04:24,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 327 transitions, 1463 flow [2022-11-16 11:04:24,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:04:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:04:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1496 transitions. [2022-11-16 11:04:24,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8548571428571429 [2022-11-16 11:04:24,581 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1496 transitions. [2022-11-16 11:04:24,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1496 transitions. [2022-11-16 11:04:24,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:24,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1496 transitions. [2022-11-16 11:04:24,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 11:04:24,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 11:04:24,589 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 11:04:24,589 INFO L175 Difference]: Start difference. First operand has 297 places, 280 transitions, 1118 flow. Second operand 7 states and 1496 transitions. [2022-11-16 11:04:24,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 327 transitions, 1463 flow [2022-11-16 11:04:24,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 327 transitions, 1434 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-16 11:04:24,755 INFO L231 Difference]: Finished difference. Result has 297 places, 278 transitions, 1099 flow [2022-11-16 11:04:24,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1099, PETRI_PLACES=297, PETRI_TRANSITIONS=278} [2022-11-16 11:04:24,757 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 77 predicate places. [2022-11-16 11:04:24,757 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 278 transitions, 1099 flow [2022-11-16 11:04:24,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.33333333333334) internal successors, (1232), 6 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states 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 11:04:24,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:24,758 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:24,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:24,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:04:24,964 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:24,964 INFO L85 PathProgramCache]: Analyzing trace with hash 118160049, now seen corresponding path program 1 times [2022-11-16 11:04:24,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:24,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324930998] [2022-11-16 11:04:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:24,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:25,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:25,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324930998] [2022-11-16 11:04:25,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324930998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:25,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029732665] [2022-11-16 11:04:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:25,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:25,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:25,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:04:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:26,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:04:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:27,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:04:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:27,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:27,725 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 11:04:27,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-11-16 11:04:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:28,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029732665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:28,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:28,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 36 [2022-11-16 11:04:28,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199785484] [2022-11-16 11:04:28,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:28,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:04:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:04:28,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:04:28,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 250 [2022-11-16 11:04:28,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 278 transitions, 1099 flow. Second operand has 37 states, 37 states have (on average 147.3783783783784) internal successors, (5453), 37 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states 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 11:04:28,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:28,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 250 [2022-11-16 11:04:28,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:39,806 INFO L130 PetriNetUnfolder]: 18209/49198 cut-off events. [2022-11-16 11:04:39,807 INFO L131 PetriNetUnfolder]: For 19540/20852 co-relation queries the response was YES. [2022-11-16 11:04:40,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101662 conditions, 49198 events. 18209/49198 cut-off events. For 19540/20852 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 585410 event pairs, 5271 based on Foata normal form. 1088/38087 useless extension candidates. Maximal degree in co-relation 101319. Up to 11680 conditions per place. [2022-11-16 11:04:40,388 INFO L137 encePairwiseOnDemand]: 219/250 looper letters, 263 selfloop transitions, 68 changer transitions 1/458 dead transitions. [2022-11-16 11:04:40,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 458 transitions, 2353 flow [2022-11-16 11:04:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:04:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-16 11:04:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5985 transitions. [2022-11-16 11:04:40,403 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5985 [2022-11-16 11:04:40,404 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5985 transitions. [2022-11-16 11:04:40,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5985 transitions. [2022-11-16 11:04:40,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:40,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5985 transitions. [2022-11-16 11:04:40,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 149.625) internal successors, (5985), 40 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states 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 11:04:40,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 250.0) internal successors, (10250), 41 states have internal predecessors, (10250), 0 states have call successors, (0), 0 states 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 11:04:40,433 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 250.0) internal successors, (10250), 41 states have internal predecessors, (10250), 0 states have call successors, (0), 0 states 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 11:04:40,434 INFO L175 Difference]: Start difference. First operand has 297 places, 278 transitions, 1099 flow. Second operand 40 states and 5985 transitions. [2022-11-16 11:04:40,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 458 transitions, 2353 flow [2022-11-16 11:04:40,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 458 transitions, 2327 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-16 11:04:40,526 INFO L231 Difference]: Finished difference. Result has 338 places, 310 transitions, 1382 flow [2022-11-16 11:04:40,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1382, PETRI_PLACES=338, PETRI_TRANSITIONS=310} [2022-11-16 11:04:40,528 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 118 predicate places. [2022-11-16 11:04:40,528 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 310 transitions, 1382 flow [2022-11-16 11:04:40,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 147.3783783783784) internal successors, (5453), 37 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states 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 11:04:40,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:40,530 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:40,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:40,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:04:40,735 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 464387218, now seen corresponding path program 1 times [2022-11-16 11:04:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:40,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919865769] [2022-11-16 11:04:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:40,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919865769] [2022-11-16 11:04:40,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919865769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848165273] [2022-11-16 11:04:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:40,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:40,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:40,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:41,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:04:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:04:41,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:04:41,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:04:41,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848165273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:41,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:04:41,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-16 11:04:41,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646962156] [2022-11-16 11:04:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:41,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:04:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:04:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:04:41,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 250 [2022-11-16 11:04:41,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 310 transitions, 1382 flow. Second operand has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states 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 11:04:41,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:41,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 250 [2022-11-16 11:04:41,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:43,619 INFO L130 PetriNetUnfolder]: 2865/13266 cut-off events. [2022-11-16 11:04:43,619 INFO L131 PetriNetUnfolder]: For 14190/14640 co-relation queries the response was YES. [2022-11-16 11:04:43,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30559 conditions, 13266 events. 2865/13266 cut-off events. For 14190/14640 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 149095 event pairs, 1828 based on Foata normal form. 774/12111 useless extension candidates. Maximal degree in co-relation 30234. Up to 5001 conditions per place. [2022-11-16 11:04:43,715 INFO L137 encePairwiseOnDemand]: 245/250 looper letters, 39 selfloop transitions, 3 changer transitions 0/306 dead transitions. [2022-11-16 11:04:43,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 306 transitions, 1438 flow [2022-11-16 11:04:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:04:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:04:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2022-11-16 11:04:43,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.849 [2022-11-16 11:04:43,718 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2022-11-16 11:04:43,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2022-11-16 11:04:43,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:43,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2022-11-16 11:04:43,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states 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 11:04:43,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 11:04:43,722 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 11:04:43,722 INFO L175 Difference]: Start difference. First operand has 338 places, 310 transitions, 1382 flow. Second operand 4 states and 849 transitions. [2022-11-16 11:04:43,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 306 transitions, 1438 flow [2022-11-16 11:04:43,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 306 transitions, 1377 flow, removed 6 selfloop flow, removed 17 redundant places. [2022-11-16 11:04:43,788 INFO L231 Difference]: Finished difference. Result has 322 places, 306 transitions, 1299 flow [2022-11-16 11:04:43,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1299, PETRI_PLACES=322, PETRI_TRANSITIONS=306} [2022-11-16 11:04:43,790 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 102 predicate places. [2022-11-16 11:04:43,790 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 306 transitions, 1299 flow [2022-11-16 11:04:43,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states 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 11:04:43,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:43,791 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:43,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:43,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:43,996 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:04:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash 464387216, now seen corresponding path program 1 times [2022-11-16 11:04:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:43,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141095853] [2022-11-16 11:04:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:46,838 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 11:04:46,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:46,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141095853] [2022-11-16 11:04:46,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141095853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687028983] [2022-11-16 11:04:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:46,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:46,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:46,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:46,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:04:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:46,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:04:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:47,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:04:48,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:04:49,335 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:04:49,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:04:49,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:04:49,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:04:50,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:04:50,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:04:50,490 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:04:50,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:04:50,545 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 11:04:50,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:50,627 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_350 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_350) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2022-11-16 11:04:53,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:04:53,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-16 11:04:53,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:04:53,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 212 [2022-11-16 11:04:53,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 112 [2022-11-16 11:04:53,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:04:53,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 164 [2022-11-16 11:04:53,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:04:53,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 105 [2022-11-16 11:04:54,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:04:54,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2022-11-16 11:04:55,801 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 11:04:55,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687028983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:55,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:55,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 25] total 69 [2022-11-16 11:04:55,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4916884] [2022-11-16 11:04:55,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 11:04:55,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 11:04:55,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=4320, Unknown=10, NotChecked=134, Total=4830 [2022-11-16 11:04:55,811 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 250 [2022-11-16 11:04:55,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 306 transitions, 1299 flow. Second operand has 70 states, 70 states have (on average 104.31428571428572) internal successors, (7302), 70 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states 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 11:04:55,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:55,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 250 [2022-11-16 11:04:55,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:13,894 INFO L130 PetriNetUnfolder]: 11899/38682 cut-off events. [2022-11-16 11:05:13,895 INFO L131 PetriNetUnfolder]: For 34984/36856 co-relation queries the response was YES. [2022-11-16 11:05:14,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85521 conditions, 38682 events. 11899/38682 cut-off events. For 34984/36856 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 481000 event pairs, 3942 based on Foata normal form. 1567/34539 useless extension candidates. Maximal degree in co-relation 85116. Up to 6749 conditions per place. [2022-11-16 11:05:14,458 INFO L137 encePairwiseOnDemand]: 203/250 looper letters, 324 selfloop transitions, 109 changer transitions 19/551 dead transitions. [2022-11-16 11:05:14,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 551 transitions, 3171 flow [2022-11-16 11:05:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 11:05:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-16 11:05:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 7527 transitions. [2022-11-16 11:05:14,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.424056338028169 [2022-11-16 11:05:14,480 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 7527 transitions. [2022-11-16 11:05:14,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 7527 transitions. [2022-11-16 11:05:14,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:14,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 7527 transitions. [2022-11-16 11:05:14,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 106.01408450704226) internal successors, (7527), 71 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states 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 11:05:14,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 250.0) internal successors, (18000), 72 states have internal predecessors, (18000), 0 states have call successors, (0), 0 states 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 11:05:14,520 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 250.0) internal successors, (18000), 72 states have internal predecessors, (18000), 0 states have call successors, (0), 0 states 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 11:05:14,520 INFO L175 Difference]: Start difference. First operand has 322 places, 306 transitions, 1299 flow. Second operand 71 states and 7527 transitions. [2022-11-16 11:05:14,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 551 transitions, 3171 flow [2022-11-16 11:05:14,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 551 transitions, 3165 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:05:14,762 INFO L231 Difference]: Finished difference. Result has 404 places, 343 transitions, 1800 flow [2022-11-16 11:05:14,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=1800, PETRI_PLACES=404, PETRI_TRANSITIONS=343} [2022-11-16 11:05:14,764 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 184 predicate places. [2022-11-16 11:05:14,764 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 343 transitions, 1800 flow [2022-11-16 11:05:14,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 104.31428571428572) internal successors, (7302), 70 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states 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 11:05:14,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:14,766 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:14,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:14,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:05:14,973 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-16 11:05:14,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:14,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1431191278, now seen corresponding path program 1 times [2022-11-16 11:05:14,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:14,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410307769] [2022-11-16 11:05:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:14,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:16,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:16,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410307769] [2022-11-16 11:05:16,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410307769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:16,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054784601] [2022-11-16 11:05:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:16,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:16,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:16,387 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:16,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e9a57bf-c249-439a-86c3-355bebf5ba17/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:05:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:16,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 11:05:16,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:17,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:05:17,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:18,865 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:05:18,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:05:19,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:05:19,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:19,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:05:20,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:20,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:05:20,137 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:05:20,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:05:20,183 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 11:05:20,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:20,295 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_392 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_392) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2022-11-16 11:05:22,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:05:22,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 11:05:22,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:05:22,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 152 [2022-11-16 11:05:22,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 112 [2022-11-16 11:05:22,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 100 [2022-11-16 11:05:22,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-11-16 11:05:23,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:05:23,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 81 [2022-11-16 11:05:24,906 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 11:05:24,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054784601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:24,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:24,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 24] total 63 [2022-11-16 11:05:24,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215946370] [2022-11-16 11:05:24,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:24,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 11:05:24,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 11:05:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3668, Unknown=10, NotChecked=122, Total=4032 [2022-11-16 11:05:24,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 250 [2022-11-16 11:05:24,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 343 transitions, 1800 flow. Second operand has 64 states, 64 states have (on average 129.984375) internal successors, (8319), 64 states have internal predecessors, (8319), 0 states have call successors, (0), 0 states 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 11:05:24,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:24,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 250 [2022-11-16 11:05:24,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand