./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:38:20,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:38:20,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:38:20,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:38:20,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:38:20,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:38:20,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:38:20,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:38:20,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:38:20,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:38:20,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:38:20,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:38:20,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:38:20,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:38:20,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:38:20,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:38:20,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:38:20,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:38:20,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:38:20,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:38:20,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:38:20,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:38:20,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:38:20,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:38:20,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:38:20,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:38:20,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:38:20,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:38:20,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:38:20,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:38:20,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:38:20,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:38:20,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:38:20,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:38:20,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:38:20,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:38:20,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:38:20,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:38:20,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:38:20,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:38:20,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:38:20,703 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:38:20,739 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:38:20,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:38:20,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:38:20,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:38:20,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:38:20,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:38:20,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:38:20,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:38:20,747 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:38:20,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:38:20,748 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:38:20,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:38:20,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:38:20,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:38:20,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:38:20,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:38:20,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:38:20,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:38:20,750 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:38:20,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:38:20,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:38:20,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:38:20,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:38:20,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:38:20,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:38:20,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:38:20,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:38:20,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:38:20,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:38:20,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:38:20,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:38:20,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:38:20,755 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:38:20,755 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:38:20,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:38:20,756 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_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-16 12:38:21,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:38:21,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:38:21,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:38:21,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:38:21,097 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:38:21,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-16 12:38:21,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/data/1f96cbc6a/a1ba713b356f40eaa828cf672157c6ba/FLAGb638b9740 [2022-11-16 12:38:21,699 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:38:21,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-16 12:38:21,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/data/1f96cbc6a/a1ba713b356f40eaa828cf672157c6ba/FLAGb638b9740 [2022-11-16 12:38:22,042 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/data/1f96cbc6a/a1ba713b356f40eaa828cf672157c6ba [2022-11-16 12:38:22,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:38:22,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:38:22,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:38:22,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:38:22,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:38:22,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213db3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22, skipping insertion in model container [2022-11-16 12:38:22,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:38:22,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:38:22,335 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-16 12:38:22,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:38:22,360 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:38:22,406 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-16 12:38:22,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:38:22,435 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:38:22,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22 WrapperNode [2022-11-16 12:38:22,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:38:22,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:38:22,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:38:22,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:38:22,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,509 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 171 [2022-11-16 12:38:22,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:38:22,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:38:22,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:38:22,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:38:22,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:38:22,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:38:22,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:38:22,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:38:22,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (1/1) ... [2022-11-16 12:38:22,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:38:22,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:22,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:38:22,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:38:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:38:22,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:38:22,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:38:22,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:38:22,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:38:22,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:38:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:38:22,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:38:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:38:22,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:38:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:38:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:38:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:38:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:38:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:38:22,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:38:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:38:22,672 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:38:22,790 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:38:22,793 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:38:23,267 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:38:23,428 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:38:23,429 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:38:23,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:38:23 BoogieIcfgContainer [2022-11-16 12:38:23,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:38:23,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:38:23,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:38:23,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:38:23,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:38:22" (1/3) ... [2022-11-16 12:38:23,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553a9a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:38:23, skipping insertion in model container [2022-11-16 12:38:23,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:38:22" (2/3) ... [2022-11-16 12:38:23,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553a9a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:38:23, skipping insertion in model container [2022-11-16 12:38:23,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:38:23" (3/3) ... [2022-11-16 12:38:23,441 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-11-16 12:38:23,450 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:38:23,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:38:23,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 12:38:23,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:38:23,537 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:38:23,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 153 transitions, 330 flow [2022-11-16 12:38:23,666 INFO L130 PetriNetUnfolder]: 10/150 cut-off events. [2022-11-16 12:38:23,666 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:38:23,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 10/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-16 12:38:23,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 153 transitions, 330 flow [2022-11-16 12:38:23,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 134 transitions, 280 flow [2022-11-16 12:38:23,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:38:23,692 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;@90f4130, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:38:23,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-16 12:38:23,710 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-16 12:38:23,710 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:38:23,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:23,711 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] [2022-11-16 12:38:23,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash 685776104, now seen corresponding path program 1 times [2022-11-16 12:38:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:23,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102099826] [2022-11-16 12:38:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:23,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:24,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:24,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102099826] [2022-11-16 12:38:24,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102099826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:24,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:38:24,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:38:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768003158] [2022-11-16 12:38:24,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:24,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:38:24,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:38:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:38:24,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-16 12:38:24,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 134 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:24,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:24,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-16 12:38:24,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:24,616 INFO L130 PetriNetUnfolder]: 291/990 cut-off events. [2022-11-16 12:38:24,616 INFO L131 PetriNetUnfolder]: For 144/152 co-relation queries the response was YES. [2022-11-16 12:38:24,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 990 events. 291/990 cut-off events. For 144/152 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6653 event pairs, 156 based on Foata normal form. 86/758 useless extension candidates. Maximal degree in co-relation 710. Up to 227 conditions per place. [2022-11-16 12:38:24,636 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 44 selfloop transitions, 4 changer transitions 2/149 dead transitions. [2022-11-16 12:38:24,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 149 transitions, 418 flow [2022-11-16 12:38:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:38:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:38:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 647 transitions. [2022-11-16 12:38:24,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8457516339869281 [2022-11-16 12:38:24,662 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 647 transitions. [2022-11-16 12:38:24,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 647 transitions. [2022-11-16 12:38:24,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:24,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 647 transitions. [2022-11-16 12:38:24,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.4) internal successors, (647), 5 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:24,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:24,686 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:24,688 INFO L175 Difference]: Start difference. First operand has 134 places, 134 transitions, 280 flow. Second operand 5 states and 647 transitions. [2022-11-16 12:38:24,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 149 transitions, 418 flow [2022-11-16 12:38:24,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 149 transitions, 406 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:38:24,700 INFO L231 Difference]: Finished difference. Result has 136 places, 128 transitions, 286 flow [2022-11-16 12:38:24,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2022-11-16 12:38:24,709 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 2 predicate places. [2022-11-16 12:38:24,709 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 286 flow [2022-11-16 12:38:24,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:24,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:24,711 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] [2022-11-16 12:38:24,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:38:24,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1842478566, now seen corresponding path program 1 times [2022-11-16 12:38:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:24,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487267595] [2022-11-16 12:38:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:24,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:25,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:25,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487267595] [2022-11-16 12:38:25,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487267595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:25,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:38:25,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:38:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474917831] [2022-11-16 12:38:25,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:25,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:38:25,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:38:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:38:25,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 153 [2022-11-16 12:38:25,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:25,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:25,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 153 [2022-11-16 12:38:25,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:25,300 INFO L130 PetriNetUnfolder]: 271/782 cut-off events. [2022-11-16 12:38:25,301 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-16 12:38:25,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 782 events. 271/782 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4193 event pairs, 84 based on Foata normal form. 34/508 useless extension candidates. Maximal degree in co-relation 708. Up to 310 conditions per place. [2022-11-16 12:38:25,309 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 22 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2022-11-16 12:38:25,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 137 transitions, 369 flow [2022-11-16 12:38:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:38:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:38:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2022-11-16 12:38:25,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8671023965141612 [2022-11-16 12:38:25,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2022-11-16 12:38:25,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2022-11-16 12:38:25,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:25,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2022-11-16 12:38:25,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:25,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:25,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:25,317 INFO L175 Difference]: Start difference. First operand has 136 places, 128 transitions, 286 flow. Second operand 3 states and 398 transitions. [2022-11-16 12:38:25,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 137 transitions, 369 flow [2022-11-16 12:38:25,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 137 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:38:25,325 INFO L231 Difference]: Finished difference. Result has 137 places, 132 transitions, 344 flow [2022-11-16 12:38:25,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=137, PETRI_TRANSITIONS=132} [2022-11-16 12:38:25,327 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 3 predicate places. [2022-11-16 12:38:25,327 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 132 transitions, 344 flow [2022-11-16 12:38:25,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:25,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:25,328 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] [2022-11-16 12:38:25,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:38:25,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:25,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1505809870, now seen corresponding path program 1 times [2022-11-16 12:38:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:25,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708566527] [2022-11-16 12:38:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:25,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:25,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708566527] [2022-11-16 12:38:25,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708566527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:25,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893237261] [2022-11-16 12:38:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:25,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:25,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:25,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:38:25,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:38:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:38:25,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:25,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:25,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893237261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:38:25,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:38:25,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:38:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700907333] [2022-11-16 12:38:25,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:38:25,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:38:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:38:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:38:25,811 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-16 12:38:25,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 132 transitions, 344 flow. Second operand has 12 states, 12 states have (on average 119.66666666666667) internal successors, (1436), 12 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:25,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:25,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-16 12:38:25,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:26,467 INFO L130 PetriNetUnfolder]: 551/1714 cut-off events. [2022-11-16 12:38:26,467 INFO L131 PetriNetUnfolder]: For 694/2354 co-relation queries the response was YES. [2022-11-16 12:38:26,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1714 events. 551/1714 cut-off events. For 694/2354 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11569 event pairs, 250 based on Foata normal form. 3/1167 useless extension candidates. Maximal degree in co-relation 869. Up to 383 conditions per place. [2022-11-16 12:38:26,483 INFO L137 encePairwiseOnDemand]: 146/153 looper letters, 118 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2022-11-16 12:38:26,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 235 transitions, 996 flow [2022-11-16 12:38:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:38:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:38:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2225 transitions. [2022-11-16 12:38:26,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8079157588961511 [2022-11-16 12:38:26,489 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2225 transitions. [2022-11-16 12:38:26,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2225 transitions. [2022-11-16 12:38:26,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:26,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2225 transitions. [2022-11-16 12:38:26,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 123.61111111111111) internal successors, (2225), 18 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:26,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:26,504 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:26,504 INFO L175 Difference]: Start difference. First operand has 137 places, 132 transitions, 344 flow. Second operand 18 states and 2225 transitions. [2022-11-16 12:38:26,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 235 transitions, 996 flow [2022-11-16 12:38:26,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 235 transitions, 946 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:38:26,514 INFO L231 Difference]: Finished difference. Result has 156 places, 144 transitions, 432 flow [2022-11-16 12:38:26,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=432, PETRI_PLACES=156, PETRI_TRANSITIONS=144} [2022-11-16 12:38:26,516 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 22 predicate places. [2022-11-16 12:38:26,516 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 144 transitions, 432 flow [2022-11-16 12:38:26,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.66666666666667) internal successors, (1436), 12 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:26,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:26,517 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] [2022-11-16 12:38:26,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:38:26,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:26,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:26,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash 564534751, now seen corresponding path program 1 times [2022-11-16 12:38:26,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:26,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061589230] [2022-11-16 12:38:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:26,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:26,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:26,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061589230] [2022-11-16 12:38:26,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061589230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:26,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351809228] [2022-11-16 12:38:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:26,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:26,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:26,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:38:26,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:38:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:38:26,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:27,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:38:27,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351809228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:27,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:38:27,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:38:27,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456140563] [2022-11-16 12:38:27,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:27,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:38:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:38:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:38:27,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-16 12:38:27,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 144 transitions, 432 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:27,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:27,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-16 12:38:27,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:27,464 INFO L130 PetriNetUnfolder]: 551/1710 cut-off events. [2022-11-16 12:38:27,464 INFO L131 PetriNetUnfolder]: For 307/1167 co-relation queries the response was YES. [2022-11-16 12:38:27,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3503 conditions, 1710 events. 551/1710 cut-off events. For 307/1167 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11541 event pairs, 250 based on Foata normal form. 4/1124 useless extension candidates. Maximal degree in co-relation 2787. Up to 716 conditions per place. [2022-11-16 12:38:27,481 INFO L137 encePairwiseOnDemand]: 148/153 looper letters, 53 selfloop transitions, 11 changer transitions 0/163 dead transitions. [2022-11-16 12:38:27,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 163 transitions, 611 flow [2022-11-16 12:38:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:38:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:38:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 867 transitions. [2022-11-16 12:38:27,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2022-11-16 12:38:27,485 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 867 transitions. [2022-11-16 12:38:27,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 867 transitions. [2022-11-16 12:38:27,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:27,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 867 transitions. [2022-11-16 12:38:27,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.85714285714286) internal successors, (867), 7 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:27,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:27,491 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:27,491 INFO L175 Difference]: Start difference. First operand has 156 places, 144 transitions, 432 flow. Second operand 7 states and 867 transitions. [2022-11-16 12:38:27,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 163 transitions, 611 flow [2022-11-16 12:38:27,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 163 transitions, 579 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 12:38:27,519 INFO L231 Difference]: Finished difference. Result has 152 places, 140 transitions, 395 flow [2022-11-16 12:38:27,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=152, PETRI_TRANSITIONS=140} [2022-11-16 12:38:27,520 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 18 predicate places. [2022-11-16 12:38:27,521 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 140 transitions, 395 flow [2022-11-16 12:38:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:27,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:27,522 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] [2022-11-16 12:38:27,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:38:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:27,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1533127488, now seen corresponding path program 1 times [2022-11-16 12:38:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672430457] [2022-11-16 12:38:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:27,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672430457] [2022-11-16 12:38:27,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672430457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:27,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:38:27,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:38:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94409159] [2022-11-16 12:38:27,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:27,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:38:27,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:38:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:38:27,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 153 [2022-11-16 12:38:27,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 140 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:27,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:27,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 153 [2022-11-16 12:38:27,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:28,378 INFO L130 PetriNetUnfolder]: 986/2635 cut-off events. [2022-11-16 12:38:28,378 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-11-16 12:38:28,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5575 conditions, 2635 events. 986/2635 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 19534 event pairs, 95 based on Foata normal form. 0/1880 useless extension candidates. Maximal degree in co-relation 4451. Up to 1331 conditions per place. [2022-11-16 12:38:28,401 INFO L137 encePairwiseOnDemand]: 150/153 looper letters, 27 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2022-11-16 12:38:28,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 147 transitions, 474 flow [2022-11-16 12:38:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:38:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:38:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2022-11-16 12:38:28,403 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8823529411764706 [2022-11-16 12:38:28,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2022-11-16 12:38:28,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2022-11-16 12:38:28,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:28,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2022-11-16 12:38:28,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,407 INFO L175 Difference]: Start difference. First operand has 152 places, 140 transitions, 395 flow. Second operand 3 states and 405 transitions. [2022-11-16 12:38:28,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 147 transitions, 474 flow [2022-11-16 12:38:28,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 147 transitions, 460 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:38:28,410 INFO L231 Difference]: Finished difference. Result has 150 places, 139 transitions, 385 flow [2022-11-16 12:38:28,411 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2022-11-16 12:38:28,411 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 16 predicate places. [2022-11-16 12:38:28,411 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 385 flow [2022-11-16 12:38:28,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,412 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:28,412 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] [2022-11-16 12:38:28,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:38:28,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:28,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1533127521, now seen corresponding path program 1 times [2022-11-16 12:38:28,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:28,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271958462] [2022-11-16 12:38:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:28,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:28,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271958462] [2022-11-16 12:38:28,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271958462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:28,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:38:28,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:38:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720553776] [2022-11-16 12:38:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:38:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:38:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:38:28,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 153 [2022-11-16 12:38:28,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 385 flow. Second operand has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:28,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 153 [2022-11-16 12:38:28,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:28,851 INFO L130 PetriNetUnfolder]: 626/1790 cut-off events. [2022-11-16 12:38:28,851 INFO L131 PetriNetUnfolder]: For 294/694 co-relation queries the response was YES. [2022-11-16 12:38:28,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 1790 events. 626/1790 cut-off events. For 294/694 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 11608 event pairs, 330 based on Foata normal form. 0/1180 useless extension candidates. Maximal degree in co-relation 2925. Up to 939 conditions per place. [2022-11-16 12:38:28,870 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 17 selfloop transitions, 4 changer transitions 0/136 dead transitions. [2022-11-16 12:38:28,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 136 transitions, 415 flow [2022-11-16 12:38:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:38:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:38:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2022-11-16 12:38:28,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8196078431372549 [2022-11-16 12:38:28,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2022-11-16 12:38:28,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2022-11-16 12:38:28,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:28,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2022-11-16 12:38:28,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,878 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,878 INFO L175 Difference]: Start difference. First operand has 150 places, 139 transitions, 385 flow. Second operand 5 states and 627 transitions. [2022-11-16 12:38:28,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 136 transitions, 415 flow [2022-11-16 12:38:28,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 136 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:38:28,882 INFO L231 Difference]: Finished difference. Result has 151 places, 136 transitions, 379 flow [2022-11-16 12:38:28,882 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=151, PETRI_TRANSITIONS=136} [2022-11-16 12:38:28,883 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 17 predicate places. [2022-11-16 12:38:28,883 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 136 transitions, 379 flow [2022-11-16 12:38:28,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:28,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:28,884 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] [2022-11-16 12:38:28,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:38:28,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1533127522, now seen corresponding path program 1 times [2022-11-16 12:38:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:28,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210518850] [2022-11-16 12:38:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:28,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:29,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210518850] [2022-11-16 12:38:29,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210518850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:29,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:38:29,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:38:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264560992] [2022-11-16 12:38:29,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:29,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:38:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:38:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:38:29,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 153 [2022-11-16 12:38:29,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 136 transitions, 379 flow. Second operand has 9 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:29,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:29,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 153 [2022-11-16 12:38:29,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:29,775 INFO L130 PetriNetUnfolder]: 931/2244 cut-off events. [2022-11-16 12:38:29,776 INFO L131 PetriNetUnfolder]: For 339/339 co-relation queries the response was YES. [2022-11-16 12:38:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4964 conditions, 2244 events. 931/2244 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 15037 event pairs, 460 based on Foata normal form. 23/1647 useless extension candidates. Maximal degree in co-relation 4916. Up to 1241 conditions per place. [2022-11-16 12:38:29,808 INFO L137 encePairwiseOnDemand]: 134/153 looper letters, 42 selfloop transitions, 7 changer transitions 20/163 dead transitions. [2022-11-16 12:38:29,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 163 transitions, 603 flow [2022-11-16 12:38:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:38:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 12:38:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1267 transitions. [2022-11-16 12:38:29,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7528223410576351 [2022-11-16 12:38:29,813 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1267 transitions. [2022-11-16 12:38:29,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1267 transitions. [2022-11-16 12:38:29,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:29,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1267 transitions. [2022-11-16 12:38:29,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 115.18181818181819) internal successors, (1267), 11 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:29,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:29,822 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:29,823 INFO L175 Difference]: Start difference. First operand has 151 places, 136 transitions, 379 flow. Second operand 11 states and 1267 transitions. [2022-11-16 12:38:29,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 163 transitions, 603 flow [2022-11-16 12:38:29,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 163 transitions, 595 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:38:29,827 INFO L231 Difference]: Finished difference. Result has 162 places, 136 transitions, 437 flow [2022-11-16 12:38:29,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=437, PETRI_PLACES=162, PETRI_TRANSITIONS=136} [2022-11-16 12:38:29,830 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 28 predicate places. [2022-11-16 12:38:29,830 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 136 transitions, 437 flow [2022-11-16 12:38:29,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:29,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:29,831 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] [2022-11-16 12:38:29,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:38:29,832 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash 901863828, now seen corresponding path program 1 times [2022-11-16 12:38:29,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:29,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781815865] [2022-11-16 12:38:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:29,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:30,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781815865] [2022-11-16 12:38:30,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781815865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776083314] [2022-11-16 12:38:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:30,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:30,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:30,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:38:30,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:38:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:38:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:38:30,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:38:30,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776083314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:30,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:38:30,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-16 12:38:30,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046222202] [2022-11-16 12:38:30,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:30,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:38:30,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:38:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:38:30,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 153 [2022-11-16 12:38:30,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 136 transitions, 437 flow. Second operand has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:30,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:30,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 153 [2022-11-16 12:38:30,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:30,996 INFO L130 PetriNetUnfolder]: 569/1443 cut-off events. [2022-11-16 12:38:30,996 INFO L131 PetriNetUnfolder]: For 1788/1884 co-relation queries the response was YES. [2022-11-16 12:38:31,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4788 conditions, 1443 events. 569/1443 cut-off events. For 1788/1884 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8692 event pairs, 64 based on Foata normal form. 84/1243 useless extension candidates. Maximal degree in co-relation 4684. Up to 423 conditions per place. [2022-11-16 12:38:31,013 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 24 selfloop transitions, 11 changer transitions 5/148 dead transitions. [2022-11-16 12:38:31,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 148 transitions, 622 flow [2022-11-16 12:38:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:38:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:38:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1087 transitions. [2022-11-16 12:38:31,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7893972403776325 [2022-11-16 12:38:31,017 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1087 transitions. [2022-11-16 12:38:31,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1087 transitions. [2022-11-16 12:38:31,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:31,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1087 transitions. [2022-11-16 12:38:31,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.77777777777777) internal successors, (1087), 9 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:31,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:31,024 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:31,024 INFO L175 Difference]: Start difference. First operand has 162 places, 136 transitions, 437 flow. Second operand 9 states and 1087 transitions. [2022-11-16 12:38:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 148 transitions, 622 flow [2022-11-16 12:38:31,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 148 transitions, 579 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-11-16 12:38:31,030 INFO L231 Difference]: Finished difference. Result has 157 places, 131 transitions, 410 flow [2022-11-16 12:38:31,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2022-11-16 12:38:31,031 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 23 predicate places. [2022-11-16 12:38:31,031 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 410 flow [2022-11-16 12:38:31,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:31,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:31,032 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] [2022-11-16 12:38:31,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:38:31,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:31,237 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1889588361, now seen corresponding path program 1 times [2022-11-16 12:38:31,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:31,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429278493] [2022-11-16 12:38:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:31,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:32,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429278493] [2022-11-16 12:38:32,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429278493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:32,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967883362] [2022-11-16 12:38:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:32,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:32,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:32,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:38:32,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:38:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:38:33,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:33,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:38:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:34,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 12:38:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:34,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 12:38:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:34,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:42,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:42,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-16 12:38:42,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:42,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 162 [2022-11-16 12:38:42,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-11-16 12:38:42,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-16 12:38:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:44,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967883362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:38:44,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:38:44,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 20] total 59 [2022-11-16 12:38:44,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121559448] [2022-11-16 12:38:44,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:38:44,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 12:38:44,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 12:38:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3261, Unknown=5, NotChecked=0, Total=3540 [2022-11-16 12:38:44,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 153 [2022-11-16 12:38:44,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 131 transitions, 410 flow. Second operand has 60 states, 60 states have (on average 74.23333333333333) internal successors, (4454), 60 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:44,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:44,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 153 [2022-11-16 12:38:44,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:48,125 INFO L130 PetriNetUnfolder]: 2092/4505 cut-off events. [2022-11-16 12:38:48,125 INFO L131 PetriNetUnfolder]: For 4148/4432 co-relation queries the response was YES. [2022-11-16 12:38:48,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13561 conditions, 4505 events. 2092/4505 cut-off events. For 4148/4432 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 31125 event pairs, 1329 based on Foata normal form. 0/3543 useless extension candidates. Maximal degree in co-relation 13433. Up to 3038 conditions per place. [2022-11-16 12:38:48,168 INFO L137 encePairwiseOnDemand]: 119/153 looper letters, 66 selfloop transitions, 41 changer transitions 0/166 dead transitions. [2022-11-16 12:38:48,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 166 transitions, 778 flow [2022-11-16 12:38:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:38:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 12:38:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2115 transitions. [2022-11-16 12:38:48,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49369747899159666 [2022-11-16 12:38:48,176 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2115 transitions. [2022-11-16 12:38:48,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2115 transitions. [2022-11-16 12:38:48,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:48,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2115 transitions. [2022-11-16 12:38:48,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 75.53571428571429) internal successors, (2115), 28 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:48,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 153.0) internal successors, (4437), 29 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:48,194 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 153.0) internal successors, (4437), 29 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:48,195 INFO L175 Difference]: Start difference. First operand has 157 places, 131 transitions, 410 flow. Second operand 28 states and 2115 transitions. [2022-11-16 12:38:48,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 166 transitions, 778 flow [2022-11-16 12:38:48,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 166 transitions, 742 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-16 12:38:48,267 INFO L231 Difference]: Finished difference. Result has 186 places, 157 transitions, 662 flow [2022-11-16 12:38:48,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=662, PETRI_PLACES=186, PETRI_TRANSITIONS=157} [2022-11-16 12:38:48,268 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 52 predicate places. [2022-11-16 12:38:48,268 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 157 transitions, 662 flow [2022-11-16 12:38:48,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 74.23333333333333) internal successors, (4454), 60 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:48,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:48,270 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] [2022-11-16 12:38:48,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:38:48,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:48,475 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 173638648, now seen corresponding path program 1 times [2022-11-16 12:38:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173827673] [2022-11-16 12:38:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:48,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:38:48,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:48,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173827673] [2022-11-16 12:38:48,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173827673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:48,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:38:48,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:38:48,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865556594] [2022-11-16 12:38:48,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:48,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:38:48,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:38:48,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:38:48,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 153 [2022-11-16 12:38:48,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 157 transitions, 662 flow. Second operand has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:48,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:48,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 153 [2022-11-16 12:38:48,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:49,875 INFO L130 PetriNetUnfolder]: 1825/4407 cut-off events. [2022-11-16 12:38:49,876 INFO L131 PetriNetUnfolder]: For 15919/16406 co-relation queries the response was YES. [2022-11-16 12:38:49,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 4407 events. 1825/4407 cut-off events. For 15919/16406 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 33825 event pairs, 657 based on Foata normal form. 145/4022 useless extension candidates. Maximal degree in co-relation 14253. Up to 1318 conditions per place. [2022-11-16 12:38:49,934 INFO L137 encePairwiseOnDemand]: 146/153 looper letters, 54 selfloop transitions, 12 changer transitions 2/182 dead transitions. [2022-11-16 12:38:49,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 182 transitions, 905 flow [2022-11-16 12:38:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:38:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:38:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 608 transitions. [2022-11-16 12:38:49,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7947712418300653 [2022-11-16 12:38:49,937 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 608 transitions. [2022-11-16 12:38:49,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 608 transitions. [2022-11-16 12:38:49,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:49,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 608 transitions. [2022-11-16 12:38:49,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.6) internal successors, (608), 5 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:49,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:49,942 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:49,942 INFO L175 Difference]: Start difference. First operand has 186 places, 157 transitions, 662 flow. Second operand 5 states and 608 transitions. [2022-11-16 12:38:49,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 182 transitions, 905 flow [2022-11-16 12:38:49,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 182 transitions, 849 flow, removed 14 selfloop flow, removed 13 redundant places. [2022-11-16 12:38:49,963 INFO L231 Difference]: Finished difference. Result has 178 places, 160 transitions, 657 flow [2022-11-16 12:38:49,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=657, PETRI_PLACES=178, PETRI_TRANSITIONS=160} [2022-11-16 12:38:49,966 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 44 predicate places. [2022-11-16 12:38:49,966 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 160 transitions, 657 flow [2022-11-16 12:38:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:49,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:49,967 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] [2022-11-16 12:38:49,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:38:49,968 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash 312243048, now seen corresponding path program 2 times [2022-11-16 12:38:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:49,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607073580] [2022-11-16 12:38:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:49,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:50,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607073580] [2022-11-16 12:38:50,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607073580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485898119] [2022-11-16 12:38:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:38:50,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:50,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:50,235 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:38:50,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:38:50,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:38:50,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:38:50,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:38:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 12:38:50,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 12:38:50,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485898119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:38:50,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:38:50,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 12:38:50,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132716726] [2022-11-16 12:38:50,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:38:50,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:38:50,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:38:50,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:38:50,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 153 [2022-11-16 12:38:50,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 160 transitions, 657 flow. Second operand has 18 states, 18 states have (on average 109.61111111111111) internal successors, (1973), 18 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:50,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:50,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 153 [2022-11-16 12:38:50,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:52,100 INFO L130 PetriNetUnfolder]: 955/3189 cut-off events. [2022-11-16 12:38:52,101 INFO L131 PetriNetUnfolder]: For 15037/15409 co-relation queries the response was YES. [2022-11-16 12:38:52,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10553 conditions, 3189 events. 955/3189 cut-off events. For 15037/15409 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 25069 event pairs, 625 based on Foata normal form. 2/2906 useless extension candidates. Maximal degree in co-relation 10428. Up to 846 conditions per place. [2022-11-16 12:38:52,141 INFO L137 encePairwiseOnDemand]: 142/153 looper letters, 120 selfloop transitions, 25 changer transitions 0/250 dead transitions. [2022-11-16 12:38:52,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 250 transitions, 1605 flow [2022-11-16 12:38:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:38:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:38:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2667 transitions. [2022-11-16 12:38:52,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7263071895424836 [2022-11-16 12:38:52,150 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2667 transitions. [2022-11-16 12:38:52,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2667 transitions. [2022-11-16 12:38:52,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:52,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2667 transitions. [2022-11-16 12:38:52,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 111.125) internal successors, (2667), 24 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:52,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 153.0) internal successors, (3825), 25 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:52,170 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 153.0) internal successors, (3825), 25 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:52,171 INFO L175 Difference]: Start difference. First operand has 178 places, 160 transitions, 657 flow. Second operand 24 states and 2667 transitions. [2022-11-16 12:38:52,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 250 transitions, 1605 flow [2022-11-16 12:38:52,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 250 transitions, 1586 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:38:52,186 INFO L231 Difference]: Finished difference. Result has 196 places, 164 transitions, 714 flow [2022-11-16 12:38:52,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=714, PETRI_PLACES=196, PETRI_TRANSITIONS=164} [2022-11-16 12:38:52,188 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 62 predicate places. [2022-11-16 12:38:52,188 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 164 transitions, 714 flow [2022-11-16 12:38:52,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.61111111111111) internal successors, (1973), 18 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:52,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:52,189 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:38:52,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:38:52,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:38:52,402 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:52,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1410071741, now seen corresponding path program 1 times [2022-11-16 12:38:52,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:52,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204191141] [2022-11-16 12:38:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:52,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:38:52,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204191141] [2022-11-16 12:38:52,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204191141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:52,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:38:52,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:38:52,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62581833] [2022-11-16 12:38:52,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:52,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:38:52,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:38:52,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:38:52,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 153 [2022-11-16 12:38:52,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 164 transitions, 714 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:52,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:38:52,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 153 [2022-11-16 12:38:52,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:38:53,848 INFO L130 PetriNetUnfolder]: 1731/5456 cut-off events. [2022-11-16 12:38:53,848 INFO L131 PetriNetUnfolder]: For 32831/33614 co-relation queries the response was YES. [2022-11-16 12:38:53,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18395 conditions, 5456 events. 1731/5456 cut-off events. For 32831/33614 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 46892 event pairs, 580 based on Foata normal form. 251/5281 useless extension candidates. Maximal degree in co-relation 11363. Up to 1483 conditions per place. [2022-11-16 12:38:53,900 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 30 selfloop transitions, 13 changer transitions 0/184 dead transitions. [2022-11-16 12:38:53,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 184 transitions, 964 flow [2022-11-16 12:38:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:38:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:38:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 526 transitions. [2022-11-16 12:38:53,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8594771241830066 [2022-11-16 12:38:53,902 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 526 transitions. [2022-11-16 12:38:53,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 526 transitions. [2022-11-16 12:38:53,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:38:53,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 526 transitions. [2022-11-16 12:38:53,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:53,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:53,906 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:53,906 INFO L175 Difference]: Start difference. First operand has 196 places, 164 transitions, 714 flow. Second operand 4 states and 526 transitions. [2022-11-16 12:38:53,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 184 transitions, 964 flow [2022-11-16 12:38:53,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 184 transitions, 906 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-16 12:38:53,921 INFO L231 Difference]: Finished difference. Result has 184 places, 175 transitions, 828 flow [2022-11-16 12:38:53,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=828, PETRI_PLACES=184, PETRI_TRANSITIONS=175} [2022-11-16 12:38:53,922 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 50 predicate places. [2022-11-16 12:38:53,923 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 175 transitions, 828 flow [2022-11-16 12:38:53,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:53,923 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:38:53,923 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] [2022-11-16 12:38:53,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:38:53,924 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:38:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:53,924 INFO L85 PathProgramCache]: Analyzing trace with hash 526408320, now seen corresponding path program 1 times [2022-11-16 12:38:53,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:38:53,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181679314] [2022-11-16 12:38:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:53,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:56,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:56,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181679314] [2022-11-16 12:38:56,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181679314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:56,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270820728] [2022-11-16 12:38:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:56,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:56,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:56,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:38:56,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:38:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:56,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 12:38:56,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:57,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:38:57,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:38:58,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:38:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:58,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 12:38:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:58,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:00,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:00,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-11-16 12:39:00,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:00,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 742 treesize of output 714 [2022-11-16 12:39:00,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 638 treesize of output 542 [2022-11-16 12:39:00,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:00,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 348 treesize of output 330 [2022-11-16 12:39:00,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:00,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 576 treesize of output 528 [2022-11-16 12:39:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:02,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270820728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:02,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:39:02,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 20] total 64 [2022-11-16 12:39:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757069137] [2022-11-16 12:39:02,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 12:39:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:39:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 12:39:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=3777, Unknown=13, NotChecked=0, Total=4160 [2022-11-16 12:39:02,307 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 153 [2022-11-16 12:39:02,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 175 transitions, 828 flow. Second operand has 65 states, 65 states have (on average 69.23076923076923) internal successors, (4500), 65 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:02,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:39:02,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 153 [2022-11-16 12:39:02,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:39:24,319 INFO L130 PetriNetUnfolder]: 11075/23052 cut-off events. [2022-11-16 12:39:24,319 INFO L131 PetriNetUnfolder]: For 134589/136021 co-relation queries the response was YES. [2022-11-16 12:39:24,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87717 conditions, 23052 events. 11075/23052 cut-off events. For 134589/136021 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 207743 event pairs, 1987 based on Foata normal form. 496/22822 useless extension candidates. Maximal degree in co-relation 58060. Up to 5677 conditions per place. [2022-11-16 12:39:24,566 INFO L137 encePairwiseOnDemand]: 115/153 looper letters, 308 selfloop transitions, 135 changer transitions 47/546 dead transitions. [2022-11-16 12:39:24,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 546 transitions, 3932 flow [2022-11-16 12:39:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 12:39:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-16 12:39:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4990 transitions. [2022-11-16 12:39:24,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4796232218377547 [2022-11-16 12:39:24,581 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4990 transitions. [2022-11-16 12:39:24,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4990 transitions. [2022-11-16 12:39:24,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:39:24,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4990 transitions. [2022-11-16 12:39:24,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 73.38235294117646) internal successors, (4990), 68 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 153.0) internal successors, (10557), 69 states have internal predecessors, (10557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,625 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 153.0) internal successors, (10557), 69 states have internal predecessors, (10557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,625 INFO L175 Difference]: Start difference. First operand has 184 places, 175 transitions, 828 flow. Second operand 68 states and 4990 transitions. [2022-11-16 12:39:24,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 546 transitions, 3932 flow [2022-11-16 12:39:24,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 546 transitions, 3932 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:39:24,698 INFO L231 Difference]: Finished difference. Result has 278 places, 271 transitions, 2373 flow [2022-11-16 12:39:24,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=2373, PETRI_PLACES=278, PETRI_TRANSITIONS=271} [2022-11-16 12:39:24,700 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 144 predicate places. [2022-11-16 12:39:24,700 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 271 transitions, 2373 flow [2022-11-16 12:39:24,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 69.23076923076923) internal successors, (4500), 65 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:39:24,702 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:24,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:39:24,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:39:24,908 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:39:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash 349275505, now seen corresponding path program 1 times [2022-11-16 12:39:24,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:39:24,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852395452] [2022-11-16 12:39:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:24,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:39:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:39:25,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:39:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852395452] [2022-11-16 12:39:25,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852395452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045023670] [2022-11-16 12:39:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:25,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:25,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:39:25,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:39:25,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:39:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:25,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:39:25,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:25,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:26,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045023670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:26,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:39:26,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 21 [2022-11-16 12:39:26,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758195185] [2022-11-16 12:39:26,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:26,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:39:26,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:39:26,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:39:26,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:39:26,497 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 153 [2022-11-16 12:39:26,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 271 transitions, 2373 flow. Second operand has 21 states, 21 states have (on average 105.19047619047619) internal successors, (2209), 21 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:26,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:39:26,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 153 [2022-11-16 12:39:26,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:39:31,041 INFO L130 PetriNetUnfolder]: 4711/15132 cut-off events. [2022-11-16 12:39:31,041 INFO L131 PetriNetUnfolder]: For 223760/224976 co-relation queries the response was YES. [2022-11-16 12:39:31,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76886 conditions, 15132 events. 4711/15132 cut-off events. For 223760/224976 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 158771 event pairs, 948 based on Foata normal form. 1032/15182 useless extension candidates. Maximal degree in co-relation 49317. Up to 3721 conditions per place. [2022-11-16 12:39:31,246 INFO L137 encePairwiseOnDemand]: 131/153 looper letters, 129 selfloop transitions, 44 changer transitions 72/354 dead transitions. [2022-11-16 12:39:31,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 354 transitions, 3640 flow [2022-11-16 12:39:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:39:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 12:39:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3508 transitions. [2022-11-16 12:39:31,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6947910477322242 [2022-11-16 12:39:31,255 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3508 transitions. [2022-11-16 12:39:31,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3508 transitions. [2022-11-16 12:39:31,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:39:31,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3508 transitions. [2022-11-16 12:39:31,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 106.3030303030303) internal successors, (3508), 33 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:31,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 153.0) internal successors, (5202), 34 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:31,273 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 153.0) internal successors, (5202), 34 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:31,273 INFO L175 Difference]: Start difference. First operand has 278 places, 271 transitions, 2373 flow. Second operand 33 states and 3508 transitions. [2022-11-16 12:39:31,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 354 transitions, 3640 flow [2022-11-16 12:39:31,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 354 transitions, 3178 flow, removed 182 selfloop flow, removed 33 redundant places. [2022-11-16 12:39:31,484 INFO L231 Difference]: Finished difference. Result has 284 places, 223 transitions, 1623 flow [2022-11-16 12:39:31,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1623, PETRI_PLACES=284, PETRI_TRANSITIONS=223} [2022-11-16 12:39:31,485 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 150 predicate places. [2022-11-16 12:39:31,485 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 223 transitions, 1623 flow [2022-11-16 12:39:31,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 105.19047619047619) internal successors, (2209), 21 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:31,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:39:31,487 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:31,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:39:31,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:39:31,692 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:39:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1860500773, now seen corresponding path program 1 times [2022-11-16 12:39:31,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:39:31,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189848421] [2022-11-16 12:39:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:31,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:39:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:34,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:39:34,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189848421] [2022-11-16 12:39:34,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189848421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:34,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369113261] [2022-11-16 12:39:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:34,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:34,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:39:34,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:39:34,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:39:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:39:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:35,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 12:39:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:35,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:36,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:36,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2022-11-16 12:39:36,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-16 12:39:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:38,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369113261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:38,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:39:38,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 58 [2022-11-16 12:39:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676489968] [2022-11-16 12:39:38,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:38,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-16 12:39:38,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:39:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-16 12:39:38,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=3043, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 12:39:38,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 153 [2022-11-16 12:39:38,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 223 transitions, 1623 flow. Second operand has 59 states, 59 states have (on average 73.71186440677967) internal successors, (4349), 59 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:38,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:39:38,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 153 [2022-11-16 12:39:38,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:39:55,870 INFO L130 PetriNetUnfolder]: 19606/43344 cut-off events. [2022-11-16 12:39:55,870 INFO L131 PetriNetUnfolder]: For 599987/602702 co-relation queries the response was YES. [2022-11-16 12:39:56,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227420 conditions, 43344 events. 19606/43344 cut-off events. For 599987/602702 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 451394 event pairs, 7614 based on Foata normal form. 337/41451 useless extension candidates. Maximal degree in co-relation 135312. Up to 17168 conditions per place. [2022-11-16 12:39:56,762 INFO L137 encePairwiseOnDemand]: 123/153 looper letters, 226 selfloop transitions, 79 changer transitions 3/373 dead transitions. [2022-11-16 12:39:56,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 373 transitions, 3576 flow [2022-11-16 12:39:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 12:39:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-16 12:39:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3268 transitions. [2022-11-16 12:39:56,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2022-11-16 12:39:56,782 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3268 transitions. [2022-11-16 12:39:56,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3268 transitions. [2022-11-16 12:39:56,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:39:56,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3268 transitions. [2022-11-16 12:39:56,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 76.0) internal successors, (3268), 43 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:56,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 153.0) internal successors, (6732), 44 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:56,803 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 153.0) internal successors, (6732), 44 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:56,803 INFO L175 Difference]: Start difference. First operand has 284 places, 223 transitions, 1623 flow. Second operand 43 states and 3268 transitions. [2022-11-16 12:39:56,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 373 transitions, 3576 flow [2022-11-16 12:39:57,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 373 transitions, 3262 flow, removed 138 selfloop flow, removed 29 redundant places. [2022-11-16 12:39:57,351 INFO L231 Difference]: Finished difference. Result has 283 places, 249 transitions, 2045 flow [2022-11-16 12:39:57,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=2045, PETRI_PLACES=283, PETRI_TRANSITIONS=249} [2022-11-16 12:39:57,352 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 149 predicate places. [2022-11-16 12:39:57,352 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 249 transitions, 2045 flow [2022-11-16 12:39:57,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 73.71186440677967) internal successors, (4349), 59 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:57,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:39:57,354 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:57,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:39:57,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:39:57,560 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:39:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash -819406599, now seen corresponding path program 1 times [2022-11-16 12:39:57,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:39:57,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733988719] [2022-11-16 12:39:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:39:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:00,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733988719] [2022-11-16 12:40:00,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733988719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692541135] [2022-11-16 12:40:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:00,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:00,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:00,277 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:00,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:40:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:00,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:40:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:01,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:40:02,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:40:02,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:40:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:40:02,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:40:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:03,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:05,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:05,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2022-11-16 12:40:05,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:05,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 410 [2022-11-16 12:40:05,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:05,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 241 treesize of output 229 [2022-11-16 12:40:05,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:05,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 254 [2022-11-16 12:40:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:12,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692541135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:12,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:12,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 72 [2022-11-16 12:40:12,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697730767] [2022-11-16 12:40:12,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:12,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 12:40:12,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:12,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 12:40:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=4881, Unknown=10, NotChecked=0, Total=5256 [2022-11-16 12:40:12,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 153 [2022-11-16 12:40:12,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 249 transitions, 2045 flow. Second operand has 73 states, 73 states have (on average 74.52054794520548) internal successors, (5440), 73 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:12,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:40:12,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 153 [2022-11-16 12:40:12,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:40:31,975 INFO L130 PetriNetUnfolder]: 19816/44582 cut-off events. [2022-11-16 12:40:31,976 INFO L131 PetriNetUnfolder]: For 566339/570007 co-relation queries the response was YES. [2022-11-16 12:40:32,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227676 conditions, 44582 events. 19816/44582 cut-off events. For 566339/570007 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 471006 event pairs, 15040 based on Foata normal form. 17/41845 useless extension candidates. Maximal degree in co-relation 192067. Up to 30467 conditions per place. [2022-11-16 12:40:32,625 INFO L137 encePairwiseOnDemand]: 115/153 looper letters, 152 selfloop transitions, 119 changer transitions 4/339 dead transitions. [2022-11-16 12:40:32,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 339 transitions, 3530 flow [2022-11-16 12:40:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 12:40:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 12:40:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3689 transitions. [2022-11-16 12:40:32,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2022-11-16 12:40:32,632 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3689 transitions. [2022-11-16 12:40:32,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3689 transitions. [2022-11-16 12:40:32,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:40:32,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3689 transitions. [2022-11-16 12:40:32,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 75.28571428571429) internal successors, (3689), 49 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:32,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 153.0) internal successors, (7650), 50 states have internal predecessors, (7650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:32,650 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 153.0) internal successors, (7650), 50 states have internal predecessors, (7650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:32,651 INFO L175 Difference]: Start difference. First operand has 283 places, 249 transitions, 2045 flow. Second operand 49 states and 3689 transitions. [2022-11-16 12:40:32,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 339 transitions, 3530 flow [2022-11-16 12:40:33,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 339 transitions, 3399 flow, removed 34 selfloop flow, removed 24 redundant places. [2022-11-16 12:40:33,145 INFO L231 Difference]: Finished difference. Result has 325 places, 313 transitions, 3119 flow [2022-11-16 12:40:33,146 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=3119, PETRI_PLACES=325, PETRI_TRANSITIONS=313} [2022-11-16 12:40:33,146 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 191 predicate places. [2022-11-16 12:40:33,147 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 313 transitions, 3119 flow [2022-11-16 12:40:33,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 74.52054794520548) internal successors, (5440), 73 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:33,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:40:33,148 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:33,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:40:33,354 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-16 12:40:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -637153544, now seen corresponding path program 1 times [2022-11-16 12:40:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:33,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7477259] [2022-11-16 12:40:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:40:33,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7477259] [2022-11-16 12:40:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7477259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387412225] [2022-11-16 12:40:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:33,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:33,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:33,642 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:33,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bd148ff-b007-448f-bf7c-1562239f6f0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:40:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:40:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:34,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:34,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:34,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-11-16 12:40:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:36,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387412225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:36,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:36,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 15] total 33 [2022-11-16 12:40:36,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296868659] [2022-11-16 12:40:36,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:36,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:40:36,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:36,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:40:36,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:40:36,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 153 [2022-11-16 12:40:36,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 313 transitions, 3119 flow. Second operand has 34 states, 34 states have (on average 92.55882352941177) internal successors, (3147), 34 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:36,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:40:36,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 153 [2022-11-16 12:40:36,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand