./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:47:01,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:47:01,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:47:01,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:47:01,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:47:01,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:47:01,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:47:01,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:47:01,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:47:01,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:47:01,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:47:01,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:47:01,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:47:01,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:47:01,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:47:01,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:47:01,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:47:01,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:47:01,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:47:01,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:47:01,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:47:01,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:47:01,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:47:01,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:47:01,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:47:01,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:47:01,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:47:01,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:47:01,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:47:01,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:47:01,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:47:01,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:47:01,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:47:01,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:47:01,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:47:01,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:47:01,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:47:01,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:47:01,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:47:01,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:47:01,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:47:01,634 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 18:47:01,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:47:01,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:47:01,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:47:01,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:47:01,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:47:01,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:47:01,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:47:01,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:47:01,683 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:47:01,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:47:01,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:47:01,685 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:47:01,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:47:01,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:47:01,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:47:01,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:47:01,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:47:01,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:47:01,687 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 18:47:01,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:47:01,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:47:01,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:47:01,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:47:01,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:47:01,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:47:01,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:47:01,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:47:01,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:47:01,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:47:01,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:47:01,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:47:01,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:47:01,692 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:47:01,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:47:01,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:47:01,693 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_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-18 18:47:01,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:47:02,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:47:02,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:47:02,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:47:02,042 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:47:02,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-18 18:47:02,131 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/data/86febf00e/ee49e0224d4b462191580a05a9a1332f/FLAG19aa1e4e1 [2022-11-18 18:47:02,636 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:47:02,637 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-18 18:47:02,646 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/data/86febf00e/ee49e0224d4b462191580a05a9a1332f/FLAG19aa1e4e1 [2022-11-18 18:47:02,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/data/86febf00e/ee49e0224d4b462191580a05a9a1332f [2022-11-18 18:47:02,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:47:02,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:47:02,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:47:02,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:47:02,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:47:02,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:47:02" (1/1) ... [2022-11-18 18:47:02,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75637ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:02, skipping insertion in model container [2022-11-18 18:47:02,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:47:02" (1/1) ... [2022-11-18 18:47:02,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:47:03,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:47:03,307 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-18 18:47:03,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:47:03,324 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:47:03,350 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-18 18:47:03,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:47:03,371 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:47:03,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03 WrapperNode [2022-11-18 18:47:03,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:47:03,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:47:03,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:47:03,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:47:03,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,461 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 201 [2022-11-18 18:47:03,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:47:03,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:47:03,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:47:03,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:47:03,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,505 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:47:03,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:47:03,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:47:03,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:47:03,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (1/1) ... [2022-11-18 18:47:03,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:47:03,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:03,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:47:03,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:47:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:47:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:47:03,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:47:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:47:03,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:47:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:47:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:47:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:47:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 18:47:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 18:47:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:47:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:47:03,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:47:03,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:47:03,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:47:03,599 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:47:03,713 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:47:03,715 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:47:04,232 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:47:04,511 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:47:04,511 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 18:47:04,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:47:04 BoogieIcfgContainer [2022-11-18 18:47:04,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:47:04,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:47:04,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:47:04,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:47:04,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:47:02" (1/3) ... [2022-11-18 18:47:04,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e276293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:47:04, skipping insertion in model container [2022-11-18 18:47:04,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:03" (2/3) ... [2022-11-18 18:47:04,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e276293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:47:04, skipping insertion in model container [2022-11-18 18:47:04,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:47:04" (3/3) ... [2022-11-18 18:47:04,540 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-11-18 18:47:04,549 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:47:04,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:47:04,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-18 18:47:04,562 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:47:04,648 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:47:04,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 180 transitions, 376 flow [2022-11-18 18:47:04,820 INFO L130 PetriNetUnfolder]: 13/178 cut-off events. [2022-11-18 18:47:04,820 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:47:04,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 178 events. 13/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 120 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 140. Up to 2 conditions per place. [2022-11-18 18:47:04,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 180 transitions, 376 flow [2022-11-18 18:47:04,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 159 transitions, 327 flow [2022-11-18 18:47:04,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:47:04,851 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;@7697f342, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:47:04,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-18 18:47:04,870 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-18 18:47:04,871 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:47:04,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:04,872 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] [2022-11-18 18:47:04,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash 822045203, now seen corresponding path program 1 times [2022-11-18 18:47:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:04,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935145333] [2022-11-18 18:47:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:04,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:05,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:05,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935145333] [2022-11-18 18:47:05,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935145333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:05,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:05,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:47:05,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625847273] [2022-11-18 18:47:05,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:05,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:47:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:05,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:47:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:47:05,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-18 18:47:05,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 159 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:05,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-18 18:47:05,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:05,688 INFO L130 PetriNetUnfolder]: 23/315 cut-off events. [2022-11-18 18:47:05,688 INFO L131 PetriNetUnfolder]: For 30/32 co-relation queries the response was YES. [2022-11-18 18:47:05,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 315 events. 23/315 cut-off events. For 30/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 853 event pairs, 6 based on Foata normal form. 22/291 useless extension candidates. Maximal degree in co-relation 236. Up to 42 conditions per place. [2022-11-18 18:47:05,696 INFO L137 encePairwiseOnDemand]: 159/180 looper letters, 42 selfloop transitions, 9 changer transitions 4/173 dead transitions. [2022-11-18 18:47:05,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 173 transitions, 466 flow [2022-11-18 18:47:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:47:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:47:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 767 transitions. [2022-11-18 18:47:05,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8522222222222222 [2022-11-18 18:47:05,730 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 767 transitions. [2022-11-18 18:47:05,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 767 transitions. [2022-11-18 18:47:05,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:05,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 767 transitions. [2022-11-18 18:47:05,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,757 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,760 INFO L175 Difference]: Start difference. First operand has 154 places, 159 transitions, 327 flow. Second operand 5 states and 767 transitions. [2022-11-18 18:47:05,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 173 transitions, 466 flow [2022-11-18 18:47:05,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 173 transitions, 456 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:47:05,773 INFO L231 Difference]: Finished difference. Result has 158 places, 154 transitions, 365 flow [2022-11-18 18:47:05,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=158, PETRI_TRANSITIONS=154} [2022-11-18 18:47:05,782 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 4 predicate places. [2022-11-18 18:47:05,783 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 154 transitions, 365 flow [2022-11-18 18:47:05,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:05,785 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] [2022-11-18 18:47:05,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:47:05,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1012410176, now seen corresponding path program 1 times [2022-11-18 18:47:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:05,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709465242] [2022-11-18 18:47:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:05,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709465242] [2022-11-18 18:47:06,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709465242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43236248] [2022-11-18 18:47:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:06,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:06,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:06,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:47:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:06,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:06,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:06,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:06,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43236248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:06,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:06,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 18:47:06,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811794107] [2022-11-18 18:47:06,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:06,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:47:06,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:47:06,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:47:06,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-18 18:47:06,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 154 transitions, 365 flow. Second operand has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:06,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:06,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-18 18:47:06,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:07,031 INFO L130 PetriNetUnfolder]: 56/675 cut-off events. [2022-11-18 18:47:07,032 INFO L131 PetriNetUnfolder]: For 47/52 co-relation queries the response was YES. [2022-11-18 18:47:07,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 675 events. 56/675 cut-off events. For 47/52 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2899 event pairs, 15 based on Foata normal form. 6/586 useless extension candidates. Maximal degree in co-relation 544. Up to 35 conditions per place. [2022-11-18 18:47:07,037 INFO L137 encePairwiseOnDemand]: 165/180 looper letters, 81 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2022-11-18 18:47:07,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 239 transitions, 843 flow [2022-11-18 18:47:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:47:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:47:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2647 transitions. [2022-11-18 18:47:07,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8169753086419753 [2022-11-18 18:47:07,045 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2647 transitions. [2022-11-18 18:47:07,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2647 transitions. [2022-11-18 18:47:07,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:07,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2647 transitions. [2022-11-18 18:47:07,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 147.05555555555554) internal successors, (2647), 18 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,063 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,063 INFO L175 Difference]: Start difference. First operand has 158 places, 154 transitions, 365 flow. Second operand 18 states and 2647 transitions. [2022-11-18 18:47:07,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 239 transitions, 843 flow [2022-11-18 18:47:07,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 239 transitions, 838 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:47:07,070 INFO L231 Difference]: Finished difference. Result has 174 places, 181 transitions, 598 flow [2022-11-18 18:47:07,071 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=598, PETRI_PLACES=174, PETRI_TRANSITIONS=181} [2022-11-18 18:47:07,072 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 20 predicate places. [2022-11-18 18:47:07,072 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 181 transitions, 598 flow [2022-11-18 18:47:07,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:07,074 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] [2022-11-18 18:47:07,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-18 18:47:07,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1319944917, now seen corresponding path program 1 times [2022-11-18 18:47:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323717175] [2022-11-18 18:47:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:07,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:07,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323717175] [2022-11-18 18:47:07,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323717175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:07,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470848165] [2022-11-18 18:47:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:07,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:07,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:07,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:07,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:47:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:07,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:07,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:07,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:07,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470848165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:07,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:47:07,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 18:47:07,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690970659] [2022-11-18 18:47:07,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:07,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:47:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:47:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:47:07,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-18 18:47:07,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 181 transitions, 598 flow. Second operand has 6 states, 6 states have (on average 142.33333333333334) internal successors, (854), 6 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:07,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-18 18:47:07,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:07,960 INFO L130 PetriNetUnfolder]: 56/667 cut-off events. [2022-11-18 18:47:07,960 INFO L131 PetriNetUnfolder]: For 141/146 co-relation queries the response was YES. [2022-11-18 18:47:07,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 667 events. 56/667 cut-off events. For 141/146 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2859 event pairs, 15 based on Foata normal form. 8/580 useless extension candidates. Maximal degree in co-relation 746. Up to 96 conditions per place. [2022-11-18 18:47:07,966 INFO L137 encePairwiseOnDemand]: 169/180 looper letters, 43 selfloop transitions, 27 changer transitions 0/188 dead transitions. [2022-11-18 18:47:07,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 188 transitions, 722 flow [2022-11-18 18:47:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:47:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:47:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1031 transitions. [2022-11-18 18:47:07,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8182539682539682 [2022-11-18 18:47:07,970 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1031 transitions. [2022-11-18 18:47:07,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1031 transitions. [2022-11-18 18:47:07,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:07,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1031 transitions. [2022-11-18 18:47:07,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,979 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,979 INFO L175 Difference]: Start difference. First operand has 174 places, 181 transitions, 598 flow. Second operand 7 states and 1031 transitions. [2022-11-18 18:47:07,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 188 transitions, 722 flow [2022-11-18 18:47:07,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 188 transitions, 648 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-18 18:47:07,992 INFO L231 Difference]: Finished difference. Result has 169 places, 173 transitions, 524 flow [2022-11-18 18:47:07,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=169, PETRI_TRANSITIONS=173} [2022-11-18 18:47:07,995 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 15 predicate places. [2022-11-18 18:47:07,996 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 173 transitions, 524 flow [2022-11-18 18:47:07,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.33333333333334) internal successors, (854), 6 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:07,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:07,997 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] [2022-11-18 18:47:08,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:08,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:08,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash 465409555, now seen corresponding path program 1 times [2022-11-18 18:47:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:08,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989836695] [2022-11-18 18:47:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:08,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:08,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989836695] [2022-11-18 18:47:08,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989836695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:08,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:08,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:47:08,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947362497] [2022-11-18 18:47:08,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:08,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:47:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:47:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:47:08,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-18 18:47:08,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 173 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:08,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:08,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-18 18:47:08,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:08,789 INFO L130 PetriNetUnfolder]: 276/1147 cut-off events. [2022-11-18 18:47:08,789 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-18 18:47:08,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 1147 events. 276/1147 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6807 event pairs, 70 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 1587. Up to 351 conditions per place. [2022-11-18 18:47:08,799 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 26 selfloop transitions, 4 changer transitions 0/188 dead transitions. [2022-11-18 18:47:08,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 188 transitions, 621 flow [2022-11-18 18:47:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:47:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:47:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 802 transitions. [2022-11-18 18:47:08,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8911111111111111 [2022-11-18 18:47:08,803 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 802 transitions. [2022-11-18 18:47:08,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 802 transitions. [2022-11-18 18:47:08,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:08,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 802 transitions. [2022-11-18 18:47:08,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:08,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:08,809 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:08,809 INFO L175 Difference]: Start difference. First operand has 169 places, 173 transitions, 524 flow. Second operand 5 states and 802 transitions. [2022-11-18 18:47:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 188 transitions, 621 flow [2022-11-18 18:47:08,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 188 transitions, 587 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 18:47:08,816 INFO L231 Difference]: Finished difference. Result has 171 places, 176 transitions, 520 flow [2022-11-18 18:47:08,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=171, PETRI_TRANSITIONS=176} [2022-11-18 18:47:08,819 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 17 predicate places. [2022-11-18 18:47:08,820 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 176 transitions, 520 flow [2022-11-18 18:47:08,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:08,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:08,821 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] [2022-11-18 18:47:08,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:47:08,821 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1195702445, now seen corresponding path program 2 times [2022-11-18 18:47:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019165504] [2022-11-18 18:47:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019165504] [2022-11-18 18:47:09,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019165504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495501546] [2022-11-18 18:47:09,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:09,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:09,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:09,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:09,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:47:09,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:47:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:47:09,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 18:47:09,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 18:47:09,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495501546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:09,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:09,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-18 18:47:09,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928134743] [2022-11-18 18:47:09,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:09,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:47:09,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:09,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:47:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:47:09,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 180 [2022-11-18 18:47:09,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 176 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 128.61111111111111) internal successors, (2315), 18 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:09,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:09,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 180 [2022-11-18 18:47:09,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:11,301 INFO L130 PetriNetUnfolder]: 85/1088 cut-off events. [2022-11-18 18:47:11,302 INFO L131 PetriNetUnfolder]: For 196/203 co-relation queries the response was YES. [2022-11-18 18:47:11,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1088 events. 85/1088 cut-off events. For 196/203 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 6105 event pairs, 42 based on Foata normal form. 4/994 useless extension candidates. Maximal degree in co-relation 1218. Up to 85 conditions per place. [2022-11-18 18:47:11,310 INFO L137 encePairwiseOnDemand]: 160/180 looper letters, 107 selfloop transitions, 65 changer transitions 0/278 dead transitions. [2022-11-18 18:47:11,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 278 transitions, 1142 flow [2022-11-18 18:47:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 18:47:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-18 18:47:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6301 transitions. [2022-11-18 18:47:11,325 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7143990929705215 [2022-11-18 18:47:11,326 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6301 transitions. [2022-11-18 18:47:11,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6301 transitions. [2022-11-18 18:47:11,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:11,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6301 transitions. [2022-11-18 18:47:11,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 128.59183673469389) internal successors, (6301), 49 states have internal predecessors, (6301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:11,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 180.0) internal successors, (9000), 50 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:11,365 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 180.0) internal successors, (9000), 50 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:11,365 INFO L175 Difference]: Start difference. First operand has 171 places, 176 transitions, 520 flow. Second operand 49 states and 6301 transitions. [2022-11-18 18:47:11,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 278 transitions, 1142 flow [2022-11-18 18:47:11,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 278 transitions, 1140 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:47:11,373 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 767 flow [2022-11-18 18:47:11,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=767, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2022-11-18 18:47:11,374 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 67 predicate places. [2022-11-18 18:47:11,375 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 767 flow [2022-11-18 18:47:11,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.61111111111111) internal successors, (2315), 18 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:11,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:11,376 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] [2022-11-18 18:47:11,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:11,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:11,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:11,583 INFO L85 PathProgramCache]: Analyzing trace with hash -463800145, now seen corresponding path program 1 times [2022-11-18 18:47:11,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:11,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103950660] [2022-11-18 18:47:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:11,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:11,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:11,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103950660] [2022-11-18 18:47:11,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103950660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:11,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:11,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:47:11,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968331690] [2022-11-18 18:47:11,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:11,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:47:11,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:11,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:47:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:47:11,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-18 18:47:11,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 767 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:11,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:11,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-18 18:47:11,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:12,272 INFO L130 PetriNetUnfolder]: 575/2068 cut-off events. [2022-11-18 18:47:12,273 INFO L131 PetriNetUnfolder]: For 446/453 co-relation queries the response was YES. [2022-11-18 18:47:12,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3696 conditions, 2068 events. 575/2068 cut-off events. For 446/453 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 16617 event pairs, 196 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 3424. Up to 736 conditions per place. [2022-11-18 18:47:12,288 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 25 selfloop transitions, 4 changer transitions 0/215 dead transitions. [2022-11-18 18:47:12,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 215 transitions, 856 flow [2022-11-18 18:47:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:47:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:47:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 801 transitions. [2022-11-18 18:47:12,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.89 [2022-11-18 18:47:12,292 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 801 transitions. [2022-11-18 18:47:12,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 801 transitions. [2022-11-18 18:47:12,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:12,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 801 transitions. [2022-11-18 18:47:12,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:12,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:12,297 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:12,297 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 767 flow. Second operand 5 states and 801 transitions. [2022-11-18 18:47:12,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 215 transitions, 856 flow [2022-11-18 18:47:12,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 215 transitions, 773 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-18 18:47:12,305 INFO L231 Difference]: Finished difference. Result has 213 places, 204 transitions, 714 flow [2022-11-18 18:47:12,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=213, PETRI_TRANSITIONS=204} [2022-11-18 18:47:12,308 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 59 predicate places. [2022-11-18 18:47:12,308 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 204 transitions, 714 flow [2022-11-18 18:47:12,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:12,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:12,309 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] [2022-11-18 18:47:12,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:47:12,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash 114987223, now seen corresponding path program 1 times [2022-11-18 18:47:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193678689] [2022-11-18 18:47:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:12,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:12,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:12,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193678689] [2022-11-18 18:47:12,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193678689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:12,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012783399] [2022-11-18 18:47:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:12,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:12,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:12,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:47:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:12,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 18:47:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:12,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:12,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012783399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:12,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:47:12,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-18 18:47:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626815136] [2022-11-18 18:47:12,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:12,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:47:12,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:47:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:12,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 180 [2022-11-18 18:47:12,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 204 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:12,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:12,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 180 [2022-11-18 18:47:12,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:13,489 INFO L130 PetriNetUnfolder]: 120/1672 cut-off events. [2022-11-18 18:47:13,490 INFO L131 PetriNetUnfolder]: For 392/399 co-relation queries the response was YES. [2022-11-18 18:47:13,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2782 conditions, 1672 events. 120/1672 cut-off events. For 392/399 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 11382 event pairs, 70 based on Foata normal form. 28/1609 useless extension candidates. Maximal degree in co-relation 2378. Up to 244 conditions per place. [2022-11-18 18:47:13,500 INFO L137 encePairwiseOnDemand]: 168/180 looper letters, 75 selfloop transitions, 22 changer transitions 10/238 dead transitions. [2022-11-18 18:47:13,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 238 transitions, 1072 flow [2022-11-18 18:47:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:47:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 18:47:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1414 transitions. [2022-11-18 18:47:13,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7855555555555556 [2022-11-18 18:47:13,506 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1414 transitions. [2022-11-18 18:47:13,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1414 transitions. [2022-11-18 18:47:13,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:13,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1414 transitions. [2022-11-18 18:47:13,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.4) internal successors, (1414), 10 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:13,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 180.0) internal successors, (1980), 11 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:13,518 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 180.0) internal successors, (1980), 11 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:13,518 INFO L175 Difference]: Start difference. First operand has 213 places, 204 transitions, 714 flow. Second operand 10 states and 1414 transitions. [2022-11-18 18:47:13,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 238 transitions, 1072 flow [2022-11-18 18:47:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 238 transitions, 1070 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:47:13,528 INFO L231 Difference]: Finished difference. Result has 223 places, 205 transitions, 770 flow [2022-11-18 18:47:13,528 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=770, PETRI_PLACES=223, PETRI_TRANSITIONS=205} [2022-11-18 18:47:13,529 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 69 predicate places. [2022-11-18 18:47:13,529 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 205 transitions, 770 flow [2022-11-18 18:47:13,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:13,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:13,530 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] [2022-11-18 18:47:13,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 18:47:13,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:47:13,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash 568080778, now seen corresponding path program 1 times [2022-11-18 18:47:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:13,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999129176] [2022-11-18 18:47:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:13,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:13,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999129176] [2022-11-18 18:47:13,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999129176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:13,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215951921] [2022-11-18 18:47:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:13,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:13,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:13,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:13,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:47:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:14,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215951921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:14,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:14,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 18:47:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184290449] [2022-11-18 18:47:14,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:14,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:47:14,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:14,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:47:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:47:14,152 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-18 18:47:14,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 205 transitions, 770 flow. Second operand has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:14,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:14,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-18 18:47:14,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:15,527 INFO L130 PetriNetUnfolder]: 1072/4094 cut-off events. [2022-11-18 18:47:15,528 INFO L131 PetriNetUnfolder]: For 1057/1253 co-relation queries the response was YES. [2022-11-18 18:47:15,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 4094 events. 1072/4094 cut-off events. For 1057/1253 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 36219 event pairs, 175 based on Foata normal form. 91/3849 useless extension candidates. Maximal degree in co-relation 8306. Up to 842 conditions per place. [2022-11-18 18:47:15,568 INFO L137 encePairwiseOnDemand]: 173/180 looper letters, 67 selfloop transitions, 18 changer transitions 0/272 dead transitions. [2022-11-18 18:47:15,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 272 transitions, 1172 flow [2022-11-18 18:47:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:47:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:47:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2860 transitions. [2022-11-18 18:47:15,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8827160493827161 [2022-11-18 18:47:15,580 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2860 transitions. [2022-11-18 18:47:15,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2860 transitions. [2022-11-18 18:47:15,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:15,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2860 transitions. [2022-11-18 18:47:15,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.88888888888889) internal successors, (2860), 18 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:15,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:15,602 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:15,603 INFO L175 Difference]: Start difference. First operand has 223 places, 205 transitions, 770 flow. Second operand 18 states and 2860 transitions. [2022-11-18 18:47:15,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 272 transitions, 1172 flow [2022-11-18 18:47:15,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 272 transitions, 1144 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 18:47:15,614 INFO L231 Difference]: Finished difference. Result has 238 places, 217 transitions, 848 flow [2022-11-18 18:47:15,615 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=848, PETRI_PLACES=238, PETRI_TRANSITIONS=217} [2022-11-18 18:47:15,618 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 84 predicate places. [2022-11-18 18:47:15,621 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 217 transitions, 848 flow [2022-11-18 18:47:15,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:15,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:15,622 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:15,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:15,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:15,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash 430635579, now seen corresponding path program 1 times [2022-11-18 18:47:15,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:15,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345506226] [2022-11-18 18:47:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:15,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:15,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:15,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345506226] [2022-11-18 18:47:15,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345506226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:15,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119210904] [2022-11-18 18:47:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:15,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:15,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:15,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:16,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:47:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:16,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:16,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119210904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:16,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:47:16,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 18:47:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764120935] [2022-11-18 18:47:16,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:16,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:47:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:47:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:47:16,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-18 18:47:16,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 217 transitions, 848 flow. Second operand has 6 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:16,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:16,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-18 18:47:16,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:17,399 INFO L130 PetriNetUnfolder]: 981/3786 cut-off events. [2022-11-18 18:47:17,402 INFO L131 PetriNetUnfolder]: For 1817/1950 co-relation queries the response was YES. [2022-11-18 18:47:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9232 conditions, 3786 events. 981/3786 cut-off events. For 1817/1950 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 33258 event pairs, 91 based on Foata normal form. 119/3618 useless extension candidates. Maximal degree in co-relation 8289. Up to 924 conditions per place. [2022-11-18 18:47:17,561 INFO L137 encePairwiseOnDemand]: 175/180 looper letters, 31 selfloop transitions, 11 changer transitions 0/229 dead transitions. [2022-11-18 18:47:17,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 229 transitions, 962 flow [2022-11-18 18:47:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:47:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:47:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1112 transitions. [2022-11-18 18:47:17,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8825396825396825 [2022-11-18 18:47:17,564 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1112 transitions. [2022-11-18 18:47:17,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1112 transitions. [2022-11-18 18:47:17,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:17,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1112 transitions. [2022-11-18 18:47:17,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 158.85714285714286) internal successors, (1112), 7 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:17,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:17,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:17,573 INFO L175 Difference]: Start difference. First operand has 238 places, 217 transitions, 848 flow. Second operand 7 states and 1112 transitions. [2022-11-18 18:47:17,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 229 transitions, 962 flow [2022-11-18 18:47:17,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 229 transitions, 930 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-18 18:47:17,593 INFO L231 Difference]: Finished difference. Result has 234 places, 213 transitions, 811 flow [2022-11-18 18:47:17,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=811, PETRI_PLACES=234, PETRI_TRANSITIONS=213} [2022-11-18 18:47:17,594 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 80 predicate places. [2022-11-18 18:47:17,594 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 213 transitions, 811 flow [2022-11-18 18:47:17,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:17,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:17,595 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] [2022-11-18 18:47:17,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:17,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:17,804 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1801998332, now seen corresponding path program 1 times [2022-11-18 18:47:17,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:17,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714944825] [2022-11-18 18:47:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:17,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:17,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:17,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714944825] [2022-11-18 18:47:17,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714944825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:17,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933410855] [2022-11-18 18:47:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:17,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:17,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:17,969 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:18,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:47:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:18,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 18:47:18,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:47:18,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:18,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933410855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:18,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:47:18,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-18 18:47:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26741784] [2022-11-18 18:47:18,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:47:18,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:18,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:47:18,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:18,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 180 [2022-11-18 18:47:18,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 213 transitions, 811 flow. Second operand has 7 states, 7 states have (on average 139.85714285714286) internal successors, (979), 7 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:18,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:18,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 180 [2022-11-18 18:47:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:19,114 INFO L130 PetriNetUnfolder]: 194/2469 cut-off events. [2022-11-18 18:47:19,114 INFO L131 PetriNetUnfolder]: For 1119/1137 co-relation queries the response was YES. [2022-11-18 18:47:19,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2469 events. 194/2469 cut-off events. For 1119/1137 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 19462 event pairs, 150 based on Foata normal form. 4/2319 useless extension candidates. Maximal degree in co-relation 3939. Up to 472 conditions per place. [2022-11-18 18:47:19,137 INFO L137 encePairwiseOnDemand]: 172/180 looper letters, 64 selfloop transitions, 11 changer transitions 4/218 dead transitions. [2022-11-18 18:47:19,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 218 transitions, 983 flow [2022-11-18 18:47:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:47:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:47:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 994 transitions. [2022-11-18 18:47:19,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7888888888888889 [2022-11-18 18:47:19,143 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 994 transitions. [2022-11-18 18:47:19,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 994 transitions. [2022-11-18 18:47:19,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:19,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 994 transitions. [2022-11-18 18:47:19,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:19,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:19,156 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:19,156 INFO L175 Difference]: Start difference. First operand has 234 places, 213 transitions, 811 flow. Second operand 7 states and 994 transitions. [2022-11-18 18:47:19,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 218 transitions, 983 flow [2022-11-18 18:47:19,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 218 transitions, 969 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 18:47:19,173 INFO L231 Difference]: Finished difference. Result has 236 places, 212 transitions, 820 flow [2022-11-18 18:47:19,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=820, PETRI_PLACES=236, PETRI_TRANSITIONS=212} [2022-11-18 18:47:19,176 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 82 predicate places. [2022-11-18 18:47:19,177 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 212 transitions, 820 flow [2022-11-18 18:47:19,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.85714285714286) internal successors, (979), 7 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:19,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:19,178 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] [2022-11-18 18:47:19,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:19,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:19,380 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1014863807, now seen corresponding path program 1 times [2022-11-18 18:47:19,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:19,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057315048] [2022-11-18 18:47:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:19,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:19,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057315048] [2022-11-18 18:47:19,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057315048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:19,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131383841] [2022-11-18 18:47:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:19,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:19,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:19,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:47:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:19,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:19,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131383841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:19,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:19,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 18:47:19,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949730797] [2022-11-18 18:47:19,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:19,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:47:19,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:19,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:47:19,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:47:19,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-18 18:47:19,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 212 transitions, 820 flow. Second operand has 12 states, 12 states have (on average 156.75) internal successors, (1881), 12 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:19,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:19,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-18 18:47:19,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:21,992 INFO L130 PetriNetUnfolder]: 2780/7979 cut-off events. [2022-11-18 18:47:21,992 INFO L131 PetriNetUnfolder]: For 6207/6981 co-relation queries the response was YES. [2022-11-18 18:47:22,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19632 conditions, 7979 events. 2780/7979 cut-off events. For 6207/6981 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 85852 event pairs, 312 based on Foata normal form. 198/7211 useless extension candidates. Maximal degree in co-relation 18852. Up to 1712 conditions per place. [2022-11-18 18:47:22,062 INFO L137 encePairwiseOnDemand]: 173/180 looper letters, 63 selfloop transitions, 18 changer transitions 0/275 dead transitions. [2022-11-18 18:47:22,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 275 transitions, 1226 flow [2022-11-18 18:47:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:47:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:47:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2856 transitions. [2022-11-18 18:47:22,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8814814814814815 [2022-11-18 18:47:22,067 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2856 transitions. [2022-11-18 18:47:22,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2856 transitions. [2022-11-18 18:47:22,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:22,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2856 transitions. [2022-11-18 18:47:22,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.66666666666666) internal successors, (2856), 18 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:22,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:22,081 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:22,081 INFO L175 Difference]: Start difference. First operand has 236 places, 212 transitions, 820 flow. Second operand 18 states and 2856 transitions. [2022-11-18 18:47:22,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 275 transitions, 1226 flow [2022-11-18 18:47:22,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 275 transitions, 1160 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-11-18 18:47:22,109 INFO L231 Difference]: Finished difference. Result has 250 places, 224 transitions, 900 flow [2022-11-18 18:47:22,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=900, PETRI_PLACES=250, PETRI_TRANSITIONS=224} [2022-11-18 18:47:22,112 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 96 predicate places. [2022-11-18 18:47:22,112 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 224 transitions, 900 flow [2022-11-18 18:47:22,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.75) internal successors, (1881), 12 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:22,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:22,113 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:22,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:22,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:47:22,319 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1396006286, now seen corresponding path program 1 times [2022-11-18 18:47:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316100703] [2022-11-18 18:47:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:22,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:22,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316100703] [2022-11-18 18:47:22,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316100703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550386630] [2022-11-18 18:47:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:22,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:22,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:22,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:22,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:47:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:22,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:22,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:22,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550386630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:22,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:47:22,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 18:47:22,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646179537] [2022-11-18 18:47:22,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:22,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:47:22,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:22,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:47:22,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:47:22,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-18 18:47:22,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 224 transitions, 900 flow. Second operand has 6 states, 6 states have (on average 156.5) internal successors, (939), 6 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:22,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:22,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-18 18:47:22,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:24,320 INFO L130 PetriNetUnfolder]: 2534/7157 cut-off events. [2022-11-18 18:47:24,321 INFO L131 PetriNetUnfolder]: For 4933/5107 co-relation queries the response was YES. [2022-11-18 18:47:24,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17880 conditions, 7157 events. 2534/7157 cut-off events. For 4933/5107 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 76874 event pairs, 30 based on Foata normal form. 264/6767 useless extension candidates. Maximal degree in co-relation 17096. Up to 2082 conditions per place. [2022-11-18 18:47:24,374 INFO L137 encePairwiseOnDemand]: 175/180 looper letters, 30 selfloop transitions, 11 changer transitions 0/235 dead transitions. [2022-11-18 18:47:24,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 235 transitions, 1004 flow [2022-11-18 18:47:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:47:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:47:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1111 transitions. [2022-11-18 18:47:24,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8817460317460317 [2022-11-18 18:47:24,377 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1111 transitions. [2022-11-18 18:47:24,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1111 transitions. [2022-11-18 18:47:24,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:24,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1111 transitions. [2022-11-18 18:47:24,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 158.71428571428572) internal successors, (1111), 7 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:24,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:24,382 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:24,382 INFO L175 Difference]: Start difference. First operand has 250 places, 224 transitions, 900 flow. Second operand 7 states and 1111 transitions. [2022-11-18 18:47:24,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 235 transitions, 1004 flow [2022-11-18 18:47:24,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 235 transitions, 972 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-18 18:47:24,416 INFO L231 Difference]: Finished difference. Result has 246 places, 220 transitions, 863 flow [2022-11-18 18:47:24,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=246, PETRI_TRANSITIONS=220} [2022-11-18 18:47:24,418 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 92 predicate places. [2022-11-18 18:47:24,418 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 220 transitions, 863 flow [2022-11-18 18:47:24,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 156.5) internal successors, (939), 6 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:24,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:24,419 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:24,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:24,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:24,629 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:24,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1671571543, now seen corresponding path program 1 times [2022-11-18 18:47:24,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:24,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957782864] [2022-11-18 18:47:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:24,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:25,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:25,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957782864] [2022-11-18 18:47:25,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957782864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:25,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61537569] [2022-11-18 18:47:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:25,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:25,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:25,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:25,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:47:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:25,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 18:47:25,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:25,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:25,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61537569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:25,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:25,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-18 18:47:25,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306042931] [2022-11-18 18:47:25,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:25,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 18:47:25,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 18:47:25,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-11-18 18:47:25,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-18 18:47:25,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 220 transitions, 863 flow. Second operand has 32 states, 32 states have (on average 143.28125) internal successors, (4585), 32 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:25,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:25,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-18 18:47:25,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:28,968 INFO L130 PetriNetUnfolder]: 912/9108 cut-off events. [2022-11-18 18:47:28,968 INFO L131 PetriNetUnfolder]: For 4314/4440 co-relation queries the response was YES. [2022-11-18 18:47:29,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17650 conditions, 9108 events. 912/9108 cut-off events. For 4314/4440 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 95509 event pairs, 770 based on Foata normal form. 16/8480 useless extension candidates. Maximal degree in co-relation 15968. Up to 1262 conditions per place. [2022-11-18 18:47:29,024 INFO L137 encePairwiseOnDemand]: 168/180 looper letters, 224 selfloop transitions, 102 changer transitions 0/472 dead transitions. [2022-11-18 18:47:29,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 472 transitions, 2532 flow [2022-11-18 18:47:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 18:47:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-18 18:47:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6494 transitions. [2022-11-18 18:47:29,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.819949494949495 [2022-11-18 18:47:29,038 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6494 transitions. [2022-11-18 18:47:29,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6494 transitions. [2022-11-18 18:47:29,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:29,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6494 transitions. [2022-11-18 18:47:29,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 147.5909090909091) internal successors, (6494), 44 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:29,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 180.0) internal successors, (8100), 45 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:29,105 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 180.0) internal successors, (8100), 45 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:29,106 INFO L175 Difference]: Start difference. First operand has 246 places, 220 transitions, 863 flow. Second operand 44 states and 6494 transitions. [2022-11-18 18:47:29,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 472 transitions, 2532 flow [2022-11-18 18:47:29,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 472 transitions, 2518 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 18:47:29,155 INFO L231 Difference]: Finished difference. Result has 293 places, 280 transitions, 1502 flow [2022-11-18 18:47:29,156 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1502, PETRI_PLACES=293, PETRI_TRANSITIONS=280} [2022-11-18 18:47:29,156 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 139 predicate places. [2022-11-18 18:47:29,157 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 280 transitions, 1502 flow [2022-11-18 18:47:29,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 143.28125) internal successors, (4585), 32 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:29,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:29,158 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:29,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:29,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:47:29,363 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:29,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1589000027, now seen corresponding path program 1 times [2022-11-18 18:47:29,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:29,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469578120] [2022-11-18 18:47:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:29,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:29,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469578120] [2022-11-18 18:47:29,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469578120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445140561] [2022-11-18 18:47:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:29,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:29,677 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:29,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:47:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:29,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:47:29,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:29,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:30,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445140561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:30,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:30,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-18 18:47:30,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631865523] [2022-11-18 18:47:30,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:47:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:47:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:47:30,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-18 18:47:30,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 280 transitions, 1502 flow. Second operand has 24 states, 24 states have (on average 157.08333333333334) internal successors, (3770), 24 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:30,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:30,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-18 18:47:30,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:37,287 INFO L130 PetriNetUnfolder]: 8332/23990 cut-off events. [2022-11-18 18:47:37,287 INFO L131 PetriNetUnfolder]: For 14196/14644 co-relation queries the response was YES. [2022-11-18 18:47:37,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60949 conditions, 23990 events. 8332/23990 cut-off events. For 14196/14644 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 272818 event pairs, 574 based on Foata normal form. 588/23010 useless extension candidates. Maximal degree in co-relation 59022. Up to 8080 conditions per place. [2022-11-18 18:47:37,524 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 131 selfloop transitions, 32 changer transitions 0/417 dead transitions. [2022-11-18 18:47:37,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 417 transitions, 2330 flow [2022-11-18 18:47:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 18:47:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-18 18:47:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5097 transitions. [2022-11-18 18:47:37,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8848958333333333 [2022-11-18 18:47:37,535 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5097 transitions. [2022-11-18 18:47:37,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5097 transitions. [2022-11-18 18:47:37,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:37,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5097 transitions. [2022-11-18 18:47:37,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 159.28125) internal successors, (5097), 32 states have internal predecessors, (5097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:37,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:37,559 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:37,559 INFO L175 Difference]: Start difference. First operand has 293 places, 280 transitions, 1502 flow. Second operand 32 states and 5097 transitions. [2022-11-18 18:47:37,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 417 transitions, 2330 flow [2022-11-18 18:47:37,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 417 transitions, 2263 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-11-18 18:47:37,633 INFO L231 Difference]: Finished difference. Result has 316 places, 299 transitions, 1627 flow [2022-11-18 18:47:37,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1627, PETRI_PLACES=316, PETRI_TRANSITIONS=299} [2022-11-18 18:47:37,635 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 162 predicate places. [2022-11-18 18:47:37,635 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 299 transitions, 1627 flow [2022-11-18 18:47:37,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 157.08333333333334) internal successors, (3770), 24 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:37,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:37,637 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:37,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:47:37,852 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:47:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash 80890487, now seen corresponding path program 2 times [2022-11-18 18:47:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:37,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005203666] [2022-11-18 18:47:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:38,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:38,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005203666] [2022-11-18 18:47:38,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005203666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:38,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609441547] [2022-11-18 18:47:38,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:38,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:38,168 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:38,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:47:38,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:47:38,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:38,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:38,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 18:47:38,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 18:47:38,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609441547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:38,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:38,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-18 18:47:38,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076149219] [2022-11-18 18:47:38,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:38,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:47:38,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:47:38,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:47:38,748 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 180 [2022-11-18 18:47:38,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 299 transitions, 1627 flow. Second operand has 16 states, 16 states have (on average 150.5625) internal successors, (2409), 16 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:38,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:38,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 180 [2022-11-18 18:47:38,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:59,080 INFO L130 PetriNetUnfolder]: 32104/78870 cut-off events. [2022-11-18 18:47:59,081 INFO L131 PetriNetUnfolder]: For 36030/36030 co-relation queries the response was YES. [2022-11-18 18:47:59,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186565 conditions, 78870 events. 32104/78870 cut-off events. For 36030/36030 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 958608 event pairs, 1722 based on Foata normal form. 1260/66676 useless extension candidates. Maximal degree in co-relation 184038. Up to 11790 conditions per place. [2022-11-18 18:47:59,921 INFO L137 encePairwiseOnDemand]: 171/180 looper letters, 73 selfloop transitions, 23 changer transitions 42/400 dead transitions. [2022-11-18 18:47:59,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 400 transitions, 2175 flow [2022-11-18 18:47:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:47:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 18:47:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3370 transitions. [2022-11-18 18:47:59,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.851010101010101 [2022-11-18 18:47:59,928 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3370 transitions. [2022-11-18 18:47:59,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3370 transitions. [2022-11-18 18:47:59,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:59,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3370 transitions. [2022-11-18 18:47:59,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 153.1818181818182) internal successors, (3370), 22 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:59,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:59,943 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:59,943 INFO L175 Difference]: Start difference. First operand has 316 places, 299 transitions, 1627 flow. Second operand 22 states and 3370 transitions. [2022-11-18 18:47:59,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 400 transitions, 2175 flow [2022-11-18 18:48:01,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 400 transitions, 2129 flow, removed 8 selfloop flow, removed 15 redundant places. [2022-11-18 18:48:01,083 INFO L231 Difference]: Finished difference. Result has 322 places, 297 transitions, 1635 flow [2022-11-18 18:48:01,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1635, PETRI_PLACES=322, PETRI_TRANSITIONS=297} [2022-11-18 18:48:01,084 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 168 predicate places. [2022-11-18 18:48:01,085 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 297 transitions, 1635 flow [2022-11-18 18:48:01,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 150.5625) internal successors, (2409), 16 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:01,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:01,086 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:01,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:48:01,291 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-18 18:48:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1034227675, now seen corresponding path program 2 times [2022-11-18 18:48:01,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:01,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981761082] [2022-11-18 18:48:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:48:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:02,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981761082] [2022-11-18 18:48:02,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981761082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:02,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365370908] [2022-11-18 18:48:02,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:48:02,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:02,078 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:02,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab6e23-34d6-4a69-ba62-479c73a62b50/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:48:02,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:48:02,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:48:02,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-18 18:48:02,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-18 18:48:02,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365370908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:02,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:02,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 27 [2022-11-18 18:48:02,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238867695] [2022-11-18 18:48:02,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:02,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 18:48:02,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 18:48:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-11-18 18:48:02,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 180 [2022-11-18 18:48:02,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 297 transitions, 1635 flow. Second operand has 28 states, 28 states have (on average 150.46428571428572) internal successors, (4213), 28 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:02,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:02,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 180 [2022-11-18 18:48:02,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand