./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b 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_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:38:14,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:38:14,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:38:14,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:38:14,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:38:14,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:38:14,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:38:14,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:38:14,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:38:14,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:38:14,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:38:14,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:38:14,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:38:14,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:38:14,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:38:14,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:38:14,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:38:14,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:38:14,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:38:14,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:38:14,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:38:14,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:38:14,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:38:14,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:38:14,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:38:14,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:38:14,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:38:14,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:38:14,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:38:14,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:38:14,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:38:14,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:38:14,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:38:14,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:38:14,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:38:14,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:38:14,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:38:14,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:38:14,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:38:14,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:38:14,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:38:14,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 19:38:14,826 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:38:14,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:38:14,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:38:14,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:38:14,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:38:14,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:38:14,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:38:14,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:38:14,834 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:38:14,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:38:14,835 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:38:14,836 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:38:14,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:38:14,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:38:14,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:38:14,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:38:14,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:38:14,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:38:14,837 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 19:38:14,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:38:14,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:38:14,838 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:38:14,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:38:14,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:38:14,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:38:14,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:38:14,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:38:14,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:38:14,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:38:14,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:38:14,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:38:14,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:38:14,842 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:38:14,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:38:14,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:38:14,842 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_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-18 19:38:15,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:38:15,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:38:15,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:38:15,119 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:38:15,120 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:38:15,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-18 19:38:15,207 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/data/4d82d18c0/b3f695799ad94ebcaeece256899d0bb0/FLAG931f6d163 [2022-11-18 19:38:15,737 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:38:15,737 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-18 19:38:15,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/data/4d82d18c0/b3f695799ad94ebcaeece256899d0bb0/FLAG931f6d163 [2022-11-18 19:38:16,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/data/4d82d18c0/b3f695799ad94ebcaeece256899d0bb0 [2022-11-18 19:38:16,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:38:16,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:38:16,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:38:16,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:38:16,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:38:16,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49987480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16, skipping insertion in model container [2022-11-18 19:38:16,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:38:16,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:38:16,392 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-18 19:38:16,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:38:16,402 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:38:16,422 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-18 19:38:16,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:38:16,436 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:38:16,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16 WrapperNode [2022-11-18 19:38:16,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:38:16,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:38:16,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:38:16,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:38:16,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,477 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2022-11-18 19:38:16,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:38:16,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:38:16,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:38:16,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:38:16,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,501 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:38:16,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:38:16,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:38:16,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:38:16,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (1/1) ... [2022-11-18 19:38:16,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:38:16,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:16,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:38:16,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:38:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:38:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:38:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:38:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:38:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:38:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:38:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:38:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:38:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:38:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:38:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:38:16,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:38:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:38:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:38:16,598 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:38:16,729 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:38:16,731 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:38:16,930 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:38:17,013 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:38:17,013 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:38:17,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:38:17 BoogieIcfgContainer [2022-11-18 19:38:17,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:38:17,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:38:17,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:38:17,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:38:17,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:38:16" (1/3) ... [2022-11-18 19:38:17,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ac9612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:38:17, skipping insertion in model container [2022-11-18 19:38:17,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:16" (2/3) ... [2022-11-18 19:38:17,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ac9612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:38:17, skipping insertion in model container [2022-11-18 19:38:17,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:38:17" (3/3) ... [2022-11-18 19:38:17,026 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-18 19:38:17,037 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:38:17,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:38:17,050 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-18 19:38:17,050 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:38:17,172 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:38:17,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 192 flow [2022-11-18 19:38:17,324 INFO L130 PetriNetUnfolder]: 5/86 cut-off events. [2022-11-18 19:38:17,324 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:38:17,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-11-18 19:38:17,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 88 transitions, 192 flow [2022-11-18 19:38:17,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 67 transitions, 143 flow [2022-11-18 19:38:17,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:38:17,365 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;@3bd69453, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:38:17,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-18 19:38:17,399 INFO L130 PetriNetUnfolder]: 1/31 cut-off events. [2022-11-18 19:38:17,399 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:38:17,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:17,400 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] [2022-11-18 19:38:17,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash -120636830, now seen corresponding path program 1 times [2022-11-18 19:38:17,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281666909] [2022-11-18 19:38:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:17,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:17,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281666909] [2022-11-18 19:38:17,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281666909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:17,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:38:17,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:38:17,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717462577] [2022-11-18 19:38:17,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:38:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:17,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:38:17,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:38:17,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-18 19:38:17,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:17,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:17,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-18 19:38:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:17,928 INFO L130 PetriNetUnfolder]: 18/144 cut-off events. [2022-11-18 19:38:17,928 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-18 19:38:17,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 144 events. 18/144 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 462 event pairs, 8 based on Foata normal form. 15/126 useless extension candidates. Maximal degree in co-relation 130. Up to 31 conditions per place. [2022-11-18 19:38:17,951 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 9 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2022-11-18 19:38:17,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 173 flow [2022-11-18 19:38:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:38:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:38:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2022-11-18 19:38:17,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9015151515151515 [2022-11-18 19:38:17,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2022-11-18 19:38:17,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2022-11-18 19:38:17,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:17,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2022-11-18 19:38:17,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:17,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:17,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:17,983 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 143 flow. Second operand 3 states and 238 transitions. [2022-11-18 19:38:17,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 173 flow [2022-11-18 19:38:17,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 165 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 19:38:17,991 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 150 flow [2022-11-18 19:38:17,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-18 19:38:18,012 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2022-11-18 19:38:18,012 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 150 flow [2022-11-18 19:38:18,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:18,013 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] [2022-11-18 19:38:18,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:38:18,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash 32133125, now seen corresponding path program 1 times [2022-11-18 19:38:18,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:18,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879882101] [2022-11-18 19:38:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:18,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:18,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:18,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879882101] [2022-11-18 19:38:18,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879882101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:18,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:38:18,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:38:18,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378700658] [2022-11-18 19:38:18,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:18,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:38:18,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:18,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:38:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:38:18,141 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-18 19:38:18,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:18,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-18 19:38:18,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:18,277 INFO L130 PetriNetUnfolder]: 94/248 cut-off events. [2022-11-18 19:38:18,283 INFO L131 PetriNetUnfolder]: For 35/42 co-relation queries the response was YES. [2022-11-18 19:38:18,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 248 events. 94/248 cut-off events. For 35/42 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1132 event pairs, 3 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 378. Up to 122 conditions per place. [2022-11-18 19:38:18,286 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 30 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2022-11-18 19:38:18,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 275 flow [2022-11-18 19:38:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:38:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:38:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 358 transitions. [2022-11-18 19:38:18,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8136363636363636 [2022-11-18 19:38:18,296 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 358 transitions. [2022-11-18 19:38:18,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 358 transitions. [2022-11-18 19:38:18,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:18,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 358 transitions. [2022-11-18 19:38:18,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.6) internal successors, (358), 5 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,306 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,306 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 150 flow. Second operand 5 states and 358 transitions. [2022-11-18 19:38:18,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 275 flow [2022-11-18 19:38:18,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:38:18,310 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 178 flow [2022-11-18 19:38:18,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-18 19:38:18,312 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 5 predicate places. [2022-11-18 19:38:18,313 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 178 flow [2022-11-18 19:38:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:18,314 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] [2022-11-18 19:38:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:38:18,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1013911830, now seen corresponding path program 1 times [2022-11-18 19:38:18,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:18,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548961340] [2022-11-18 19:38:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:18,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:18,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:18,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548961340] [2022-11-18 19:38:18,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548961340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:18,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843642919] [2022-11-18 19:38:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:18,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:18,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:18,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:18,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:38:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:18,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:38:18,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:18,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:18,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843642919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:18,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:18,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 19:38:18,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722674810] [2022-11-18 19:38:18,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:38:18,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:38:18,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:38:18,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-18 19:38:18,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:18,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-18 19:38:18,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:18,854 INFO L130 PetriNetUnfolder]: 42/296 cut-off events. [2022-11-18 19:38:18,854 INFO L131 PetriNetUnfolder]: For 44/48 co-relation queries the response was YES. [2022-11-18 19:38:18,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 296 events. 42/296 cut-off events. For 44/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1292 event pairs, 3 based on Foata normal form. 5/248 useless extension candidates. Maximal degree in co-relation 435. Up to 59 conditions per place. [2022-11-18 19:38:18,858 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 17 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2022-11-18 19:38:18,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 87 transitions, 308 flow [2022-11-18 19:38:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:38:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:38:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 544 transitions. [2022-11-18 19:38:18,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8831168831168831 [2022-11-18 19:38:18,861 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 544 transitions. [2022-11-18 19:38:18,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 544 transitions. [2022-11-18 19:38:18,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:18,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 544 transitions. [2022-11-18 19:38:18,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,867 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,867 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 178 flow. Second operand 7 states and 544 transitions. [2022-11-18 19:38:18,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 87 transitions, 308 flow [2022-11-18 19:38:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:38:18,871 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 285 flow [2022-11-18 19:38:18,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=285, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2022-11-18 19:38:18,872 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-11-18 19:38:18,872 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 285 flow [2022-11-18 19:38:18,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:18,873 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] [2022-11-18 19:38:18,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:19,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-18 19:38:19,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1013911831, now seen corresponding path program 1 times [2022-11-18 19:38:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:19,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633379318] [2022-11-18 19:38:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:19,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633379318] [2022-11-18 19:38:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633379318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642517101] [2022-11-18 19:38:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:19,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:19,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:19,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:19,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:38:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:38:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:19,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:38:19,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642517101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:19,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:38:19,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-18 19:38:19,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855598197] [2022-11-18 19:38:19,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:19,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:38:19,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:38:19,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:38:19,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-18 19:38:19,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:19,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:19,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-18 19:38:19,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:19,531 INFO L130 PetriNetUnfolder]: 40/322 cut-off events. [2022-11-18 19:38:19,531 INFO L131 PetriNetUnfolder]: For 599/599 co-relation queries the response was YES. [2022-11-18 19:38:19,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 322 events. 40/322 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1489 event pairs, 6 based on Foata normal form. 11/297 useless extension candidates. Maximal degree in co-relation 373. Up to 57 conditions per place. [2022-11-18 19:38:19,537 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 12 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2022-11-18 19:38:19,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 357 flow [2022-11-18 19:38:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:38:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:38:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 304 transitions. [2022-11-18 19:38:19,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2022-11-18 19:38:19,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 304 transitions. [2022-11-18 19:38:19,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 304 transitions. [2022-11-18 19:38:19,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:19,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 304 transitions. [2022-11-18 19:38:19,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:19,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:19,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:19,545 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 285 flow. Second operand 4 states and 304 transitions. [2022-11-18 19:38:19,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 357 flow [2022-11-18 19:38:19,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 341 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-18 19:38:19,556 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 339 flow [2022-11-18 19:38:19,556 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2022-11-18 19:38:19,559 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 17 predicate places. [2022-11-18 19:38:19,559 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 339 flow [2022-11-18 19:38:19,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:19,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:19,560 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:19,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 19:38:19,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:19,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash -588297799, now seen corresponding path program 1 times [2022-11-18 19:38:19,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:19,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27898517] [2022-11-18 19:38:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:19,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:19,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27898517] [2022-11-18 19:38:19,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27898517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126768522] [2022-11-18 19:38:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:19,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:19,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:19,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:19,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:38:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:19,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:38:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:20,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126768522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:20,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:20,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 19:38:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594704788] [2022-11-18 19:38:20,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:20,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:38:20,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:38:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:38:20,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-18 19:38:20,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:20,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:20,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-18 19:38:20,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:20,668 INFO L130 PetriNetUnfolder]: 302/1016 cut-off events. [2022-11-18 19:38:20,669 INFO L131 PetriNetUnfolder]: For 4293/4293 co-relation queries the response was YES. [2022-11-18 19:38:20,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1016 events. 302/1016 cut-off events. For 4293/4293 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6065 event pairs, 16 based on Foata normal form. 22/924 useless extension candidates. Maximal degree in co-relation 2971. Up to 230 conditions per place. [2022-11-18 19:38:20,682 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 131 selfloop transitions, 18 changer transitions 2/197 dead transitions. [2022-11-18 19:38:20,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 197 transitions, 1634 flow [2022-11-18 19:38:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:38:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 19:38:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1247 transitions. [2022-11-18 19:38:20,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7872474747474747 [2022-11-18 19:38:20,686 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1247 transitions. [2022-11-18 19:38:20,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1247 transitions. [2022-11-18 19:38:20,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:20,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1247 transitions. [2022-11-18 19:38:20,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.27777777777777) internal successors, (1247), 18 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:20,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:20,695 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:20,695 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 339 flow. Second operand 18 states and 1247 transitions. [2022-11-18 19:38:20,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 197 transitions, 1634 flow [2022-11-18 19:38:20,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 197 transitions, 1457 flow, removed 88 selfloop flow, removed 1 redundant places. [2022-11-18 19:38:20,708 INFO L231 Difference]: Finished difference. Result has 107 places, 90 transitions, 416 flow [2022-11-18 19:38:20,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=416, PETRI_PLACES=107, PETRI_TRANSITIONS=90} [2022-11-18 19:38:20,712 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 37 predicate places. [2022-11-18 19:38:20,712 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 416 flow [2022-11-18 19:38:20,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:20,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:20,713 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:20,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:20,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:20,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1057362306, now seen corresponding path program 1 times [2022-11-18 19:38:20,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:20,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493778749] [2022-11-18 19:38:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:20,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:21,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493778749] [2022-11-18 19:38:21,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493778749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283497218] [2022-11-18 19:38:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:21,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:21,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:21,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:21,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:38:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:38:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:21,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:38:21,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283497218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:21,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:38:21,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 19:38:21,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854161093] [2022-11-18 19:38:21,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:21,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:38:21,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:38:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:38:21,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-18 19:38:21,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 90 transitions, 416 flow. Second operand has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 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) [2022-11-18 19:38:21,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:21,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-18 19:38:21,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:21,422 INFO L130 PetriNetUnfolder]: 270/944 cut-off events. [2022-11-18 19:38:21,423 INFO L131 PetriNetUnfolder]: For 2519/2592 co-relation queries the response was YES. [2022-11-18 19:38:21,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 944 events. 270/944 cut-off events. For 2519/2592 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5855 event pairs, 37 based on Foata normal form. 52/858 useless extension candidates. Maximal degree in co-relation 2508. Up to 266 conditions per place. [2022-11-18 19:38:21,433 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 46 selfloop transitions, 11 changer transitions 2/105 dead transitions. [2022-11-18 19:38:21,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 630 flow [2022-11-18 19:38:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:38:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:38:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 484 transitions. [2022-11-18 19:38:21,435 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-11-18 19:38:21,435 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 484 transitions. [2022-11-18 19:38:21,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 484 transitions. [2022-11-18 19:38:21,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:21,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 484 transitions. [2022-11-18 19:38:21,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.14285714285714) internal successors, (484), 7 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:21,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:21,439 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:21,439 INFO L175 Difference]: Start difference. First operand has 107 places, 90 transitions, 416 flow. Second operand 7 states and 484 transitions. [2022-11-18 19:38:21,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 630 flow [2022-11-18 19:38:21,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 105 transitions, 598 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-18 19:38:21,446 INFO L231 Difference]: Finished difference. Result has 103 places, 86 transitions, 379 flow [2022-11-18 19:38:21,447 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=379, PETRI_PLACES=103, PETRI_TRANSITIONS=86} [2022-11-18 19:38:21,447 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 33 predicate places. [2022-11-18 19:38:21,448 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 86 transitions, 379 flow [2022-11-18 19:38:21,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 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) [2022-11-18 19:38:21,448 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:21,448 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] [2022-11-18 19:38:21,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:21,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 19:38:21,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:21,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:21,655 INFO L85 PathProgramCache]: Analyzing trace with hash -365327580, now seen corresponding path program 1 times [2022-11-18 19:38:21,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:21,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934444643] [2022-11-18 19:38:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:21,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:21,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:21,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934444643] [2022-11-18 19:38:21,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934444643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:21,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:38:21,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:38:21,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527701771] [2022-11-18 19:38:21,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:21,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:38:21,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:38:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:38:21,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-18 19:38:21,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 86 transitions, 379 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:21,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:21,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-18 19:38:21,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:22,033 INFO L130 PetriNetUnfolder]: 456/1410 cut-off events. [2022-11-18 19:38:22,034 INFO L131 PetriNetUnfolder]: For 2915/3117 co-relation queries the response was YES. [2022-11-18 19:38:22,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3760 conditions, 1410 events. 456/1410 cut-off events. For 2915/3117 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11777 event pairs, 228 based on Foata normal form. 28/1093 useless extension candidates. Maximal degree in co-relation 3574. Up to 716 conditions per place. [2022-11-18 19:38:22,046 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 67 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2022-11-18 19:38:22,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 128 transitions, 839 flow [2022-11-18 19:38:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:38:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:38:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2022-11-18 19:38:22,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8113636363636364 [2022-11-18 19:38:22,048 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2022-11-18 19:38:22,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2022-11-18 19:38:22,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:22,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2022-11-18 19:38:22,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:22,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:22,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:22,051 INFO L175 Difference]: Start difference. First operand has 103 places, 86 transitions, 379 flow. Second operand 5 states and 357 transitions. [2022-11-18 19:38:22,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 128 transitions, 839 flow [2022-11-18 19:38:22,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 128 transitions, 825 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:38:22,059 INFO L231 Difference]: Finished difference. Result has 105 places, 89 transitions, 395 flow [2022-11-18 19:38:22,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=395, PETRI_PLACES=105, PETRI_TRANSITIONS=89} [2022-11-18 19:38:22,060 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 35 predicate places. [2022-11-18 19:38:22,060 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 89 transitions, 395 flow [2022-11-18 19:38:22,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:22,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:22,061 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] [2022-11-18 19:38:22,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:38:22,061 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash -328099202, now seen corresponding path program 1 times [2022-11-18 19:38:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141010599] [2022-11-18 19:38:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:22,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141010599] [2022-11-18 19:38:22,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141010599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136535066] [2022-11-18 19:38:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:22,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:22,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:38:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:38:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:22,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:22,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136535066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:22,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:22,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 19:38:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138054308] [2022-11-18 19:38:22,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:22,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:38:22,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:38:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:38:22,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-18 19:38:22,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 89 transitions, 395 flow. Second operand has 12 states, 12 states have (on average 66.83333333333333) internal successors, (802), 12 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:22,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:22,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-18 19:38:22,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:23,295 INFO L130 PetriNetUnfolder]: 992/2924 cut-off events. [2022-11-18 19:38:23,296 INFO L131 PetriNetUnfolder]: For 6212/6354 co-relation queries the response was YES. [2022-11-18 19:38:23,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8504 conditions, 2924 events. 992/2924 cut-off events. For 6212/6354 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26691 event pairs, 83 based on Foata normal form. 102/2663 useless extension candidates. Maximal degree in co-relation 8321. Up to 442 conditions per place. [2022-11-18 19:38:23,329 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 224 selfloop transitions, 18 changer transitions 0/299 dead transitions. [2022-11-18 19:38:23,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 299 transitions, 2531 flow [2022-11-18 19:38:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:38:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 19:38:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1258 transitions. [2022-11-18 19:38:23,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7941919191919192 [2022-11-18 19:38:23,334 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1258 transitions. [2022-11-18 19:38:23,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1258 transitions. [2022-11-18 19:38:23,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:23,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1258 transitions. [2022-11-18 19:38:23,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.88888888888889) internal successors, (1258), 18 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:23,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:23,343 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:23,343 INFO L175 Difference]: Start difference. First operand has 105 places, 89 transitions, 395 flow. Second operand 18 states and 1258 transitions. [2022-11-18 19:38:23,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 299 transitions, 2531 flow [2022-11-18 19:38:23,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 299 transitions, 2529 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:38:23,365 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 499 flow [2022-11-18 19:38:23,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=499, PETRI_PLACES=125, PETRI_TRANSITIONS=101} [2022-11-18 19:38:23,368 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 55 predicate places. [2022-11-18 19:38:23,369 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 499 flow [2022-11-18 19:38:23,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.83333333333333) internal successors, (802), 12 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:23,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:23,370 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] [2022-11-18 19:38:23,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:23,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:23,576 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1581140375, now seen corresponding path program 1 times [2022-11-18 19:38:23,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:23,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403244010] [2022-11-18 19:38:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:23,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:23,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:23,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403244010] [2022-11-18 19:38:23,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403244010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:23,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621789225] [2022-11-18 19:38:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:23,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:23,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:23,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:38:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:38:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:23,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:38:23,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621789225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:23,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:38:23,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 19:38:23,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683766612] [2022-11-18 19:38:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:38:23,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:38:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:38:23,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-18 19:38:23,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 101 transitions, 499 flow. Second operand has 6 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:23,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:23,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-18 19:38:23,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:24,480 INFO L130 PetriNetUnfolder]: 907/2684 cut-off events. [2022-11-18 19:38:24,480 INFO L131 PetriNetUnfolder]: For 6506/6648 co-relation queries the response was YES. [2022-11-18 19:38:24,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8426 conditions, 2684 events. 907/2684 cut-off events. For 6506/6648 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24565 event pairs, 163 based on Foata normal form. 128/2370 useless extension candidates. Maximal degree in co-relation 8240. Up to 805 conditions per place. [2022-11-18 19:38:24,509 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 84 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2022-11-18 19:38:24,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 152 transitions, 1098 flow [2022-11-18 19:38:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:38:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:38:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2022-11-18 19:38:24,512 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7938311688311688 [2022-11-18 19:38:24,512 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2022-11-18 19:38:24,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2022-11-18 19:38:24,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:24,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2022-11-18 19:38:24,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:24,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:24,516 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:24,516 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 499 flow. Second operand 7 states and 489 transitions. [2022-11-18 19:38:24,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 152 transitions, 1098 flow [2022-11-18 19:38:24,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1066 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-18 19:38:24,531 INFO L231 Difference]: Finished difference. Result has 121 places, 97 transitions, 462 flow [2022-11-18 19:38:24,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=121, PETRI_TRANSITIONS=97} [2022-11-18 19:38:24,532 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 51 predicate places. [2022-11-18 19:38:24,532 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 97 transitions, 462 flow [2022-11-18 19:38:24,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:24,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:24,533 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 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] [2022-11-18 19:38:24,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:24,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:24,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1040659810, now seen corresponding path program 2 times [2022-11-18 19:38:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549197210] [2022-11-18 19:38:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:24,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:24,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:24,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549197210] [2022-11-18 19:38:24,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549197210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:24,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842685147] [2022-11-18 19:38:24,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:38:24,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:24,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:24,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:24,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:38:24,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:24,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:38:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:25,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842685147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:25,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:25,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 19:38:25,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067219750] [2022-11-18 19:38:25,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:25,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:38:25,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:25,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:38:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:38:25,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-18 19:38:25,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 97 transitions, 462 flow. Second operand has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:25,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-18 19:38:25,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:25,809 INFO L130 PetriNetUnfolder]: 282/2370 cut-off events. [2022-11-18 19:38:25,809 INFO L131 PetriNetUnfolder]: For 5810/5891 co-relation queries the response was YES. [2022-11-18 19:38:25,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5877 conditions, 2370 events. 282/2370 cut-off events. For 5810/5891 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 20149 event pairs, 20 based on Foata normal form. 263/2467 useless extension candidates. Maximal degree in co-relation 5526. Up to 230 conditions per place. [2022-11-18 19:38:25,838 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 33 selfloop transitions, 46 changer transitions 0/156 dead transitions. [2022-11-18 19:38:25,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 156 transitions, 1024 flow [2022-11-18 19:38:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:38:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 19:38:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 932 transitions. [2022-11-18 19:38:25,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8825757575757576 [2022-11-18 19:38:25,842 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 932 transitions. [2022-11-18 19:38:25,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 932 transitions. [2022-11-18 19:38:25,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:25,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 932 transitions. [2022-11-18 19:38:25,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 77.66666666666667) internal successors, (932), 12 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,848 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,848 INFO L175 Difference]: Start difference. First operand has 121 places, 97 transitions, 462 flow. Second operand 12 states and 932 transitions. [2022-11-18 19:38:25,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 156 transitions, 1024 flow [2022-11-18 19:38:25,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 156 transitions, 1010 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:38:25,866 INFO L231 Difference]: Finished difference. Result has 137 places, 136 transitions, 1044 flow [2022-11-18 19:38:25,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1044, PETRI_PLACES=137, PETRI_TRANSITIONS=136} [2022-11-18 19:38:25,867 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 67 predicate places. [2022-11-18 19:38:25,867 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 136 transitions, 1044 flow [2022-11-18 19:38:25,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:25,868 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:25,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:26,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:26,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash -653292795, now seen corresponding path program 2 times [2022-11-18 19:38:26,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:26,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296458004] [2022-11-18 19:38:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:26,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:26,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296458004] [2022-11-18 19:38:26,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296458004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076189060] [2022-11-18 19:38:26,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:38:26,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:26,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:26,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:38:26,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:38:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:26,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:38:26,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 19:38:26,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 19:38:26,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076189060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:26,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:26,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-18 19:38:26,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039707767] [2022-11-18 19:38:26,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:26,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:38:26,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:26,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:38:26,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:38:26,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-18 19:38:26,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 136 transitions, 1044 flow. Second operand has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:26,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:26,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-18 19:38:26,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:29,483 INFO L130 PetriNetUnfolder]: 3525/9775 cut-off events. [2022-11-18 19:38:29,483 INFO L131 PetriNetUnfolder]: For 33003/33013 co-relation queries the response was YES. [2022-11-18 19:38:29,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29728 conditions, 9775 events. 3525/9775 cut-off events. For 33003/33013 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 98015 event pairs, 412 based on Foata normal form. 312/8363 useless extension candidates. Maximal degree in co-relation 28980. Up to 1557 conditions per place. [2022-11-18 19:38:29,626 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 343 selfloop transitions, 23 changer transitions 10/426 dead transitions. [2022-11-18 19:38:29,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 426 transitions, 4804 flow [2022-11-18 19:38:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 19:38:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 19:38:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1401 transitions. [2022-11-18 19:38:29,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7236570247933884 [2022-11-18 19:38:29,631 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1401 transitions. [2022-11-18 19:38:29,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1401 transitions. [2022-11-18 19:38:29,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:29,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1401 transitions. [2022-11-18 19:38:29,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 63.68181818181818) internal successors, (1401), 22 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:29,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:29,642 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:29,642 INFO L175 Difference]: Start difference. First operand has 137 places, 136 transitions, 1044 flow. Second operand 22 states and 1401 transitions. [2022-11-18 19:38:29,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 426 transitions, 4804 flow [2022-11-18 19:38:29,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 426 transitions, 4314 flow, removed 241 selfloop flow, removed 4 redundant places. [2022-11-18 19:38:29,709 INFO L231 Difference]: Finished difference. Result has 154 places, 140 transitions, 1001 flow [2022-11-18 19:38:29,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1001, PETRI_PLACES=154, PETRI_TRANSITIONS=140} [2022-11-18 19:38:29,710 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-11-18 19:38:29,710 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 140 transitions, 1001 flow [2022-11-18 19:38:29,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:29,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:29,711 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-11-18 19:38:29,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:29,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:38:29,918 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1034121636, now seen corresponding path program 2 times [2022-11-18 19:38:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:29,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315136690] [2022-11-18 19:38:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:30,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:30,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315136690] [2022-11-18 19:38:30,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315136690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:30,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205029627] [2022-11-18 19:38:30,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:38:30,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:30,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:30,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:30,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:38:30,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:38:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:30,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:38:30,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-18 19:38:30,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-18 19:38:30,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205029627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:30,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:30,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-18 19:38:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553842956] [2022-11-18 19:38:30,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:30,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:38:30,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:38:30,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:38:30,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-18 19:38:30,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 140 transitions, 1001 flow. Second operand has 16 states, 16 states have (on average 61.4375) internal successors, (983), 16 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:30,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:30,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-18 19:38:30,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:33,751 INFO L130 PetriNetUnfolder]: 5337/13271 cut-off events. [2022-11-18 19:38:33,752 INFO L131 PetriNetUnfolder]: For 35738/36252 co-relation queries the response was YES. [2022-11-18 19:38:33,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40987 conditions, 13271 events. 5337/13271 cut-off events. For 35738/36252 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 137599 event pairs, 168 based on Foata normal form. 748/12891 useless extension candidates. Maximal degree in co-relation 40486. Up to 1334 conditions per place. [2022-11-18 19:38:33,922 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 768 selfloop transitions, 23 changer transitions 0/844 dead transitions. [2022-11-18 19:38:33,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 844 transitions, 9894 flow [2022-11-18 19:38:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 19:38:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 19:38:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1415 transitions. [2022-11-18 19:38:33,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7308884297520661 [2022-11-18 19:38:33,926 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1415 transitions. [2022-11-18 19:38:33,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1415 transitions. [2022-11-18 19:38:33,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:33,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1415 transitions. [2022-11-18 19:38:33,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.31818181818181) internal successors, (1415), 22 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:33,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:33,934 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:33,934 INFO L175 Difference]: Start difference. First operand has 154 places, 140 transitions, 1001 flow. Second operand 22 states and 1415 transitions. [2022-11-18 19:38:33,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 844 transitions, 9894 flow [2022-11-18 19:38:34,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 844 transitions, 9802 flow, removed 18 selfloop flow, removed 19 redundant places. [2022-11-18 19:38:34,040 INFO L231 Difference]: Finished difference. Result has 156 places, 144 transitions, 1006 flow [2022-11-18 19:38:34,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1006, PETRI_PLACES=156, PETRI_TRANSITIONS=144} [2022-11-18 19:38:34,042 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 86 predicate places. [2022-11-18 19:38:34,042 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 144 transitions, 1006 flow [2022-11-18 19:38:34,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.4375) internal successors, (983), 16 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:34,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:34,043 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:34,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:34,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:38:34,249 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 804847074, now seen corresponding path program 3 times [2022-11-18 19:38:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:34,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238542599] [2022-11-18 19:38:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:34,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:34,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:34,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238542599] [2022-11-18 19:38:34,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238542599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:34,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964279006] [2022-11-18 19:38:34,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:38:34,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:34,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:34,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:34,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:38:34,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-18 19:38:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:34,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 19:38:34,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:34,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:35,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964279006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:35,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:35,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-18 19:38:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806021883] [2022-11-18 19:38:35,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:35,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 19:38:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 19:38:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-18 19:38:35,196 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-18 19:38:35,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 144 transitions, 1006 flow. Second operand has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:35,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:35,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-18 19:38:35,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:37,234 INFO L130 PetriNetUnfolder]: 939/7882 cut-off events. [2022-11-18 19:38:37,235 INFO L131 PetriNetUnfolder]: For 61080/61343 co-relation queries the response was YES. [2022-11-18 19:38:37,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20562 conditions, 7882 events. 939/7882 cut-off events. For 61080/61343 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 81326 event pairs, 24 based on Foata normal form. 648/8515 useless extension candidates. Maximal degree in co-relation 19916. Up to 838 conditions per place. [2022-11-18 19:38:37,312 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 56 selfloop transitions, 206 changer transitions 1/348 dead transitions. [2022-11-18 19:38:37,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 348 transitions, 3143 flow [2022-11-18 19:38:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 19:38:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 19:38:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1868 transitions. [2022-11-18 19:38:37,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.884469696969697 [2022-11-18 19:38:37,316 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1868 transitions. [2022-11-18 19:38:37,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1868 transitions. [2022-11-18 19:38:37,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:37,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1868 transitions. [2022-11-18 19:38:37,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 77.83333333333333) internal successors, (1868), 24 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:37,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 88.0) internal successors, (2200), 25 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:37,327 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 88.0) internal successors, (2200), 25 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:37,327 INFO L175 Difference]: Start difference. First operand has 156 places, 144 transitions, 1006 flow. Second operand 24 states and 1868 transitions. [2022-11-18 19:38:37,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 348 transitions, 3143 flow [2022-11-18 19:38:37,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 348 transitions, 3091 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-11-18 19:38:37,371 INFO L231 Difference]: Finished difference. Result has 186 places, 304 transitions, 3409 flow [2022-11-18 19:38:37,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3409, PETRI_PLACES=186, PETRI_TRANSITIONS=304} [2022-11-18 19:38:37,373 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 116 predicate places. [2022-11-18 19:38:37,374 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 304 transitions, 3409 flow [2022-11-18 19:38:37,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:37,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:37,375 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:37,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:38:37,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 387755746, now seen corresponding path program 4 times [2022-11-18 19:38:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974028060] [2022-11-18 19:38:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:37,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:38,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974028060] [2022-11-18 19:38:38,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974028060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616721371] [2022-11-18 19:38:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:38:38,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:38,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:38,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:38:38,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:38:38,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 19:38:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:38,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:39,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616721371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:39,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:39,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-18 19:38:39,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026662716] [2022-11-18 19:38:39,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:39,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 19:38:39,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 19:38:39,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 19:38:39,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-18 19:38:39,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 304 transitions, 3409 flow. Second operand has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:39,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:39,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-18 19:38:39,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:46,997 INFO L130 PetriNetUnfolder]: 2453/20592 cut-off events. [2022-11-18 19:38:46,997 INFO L131 PetriNetUnfolder]: For 686257/687054 co-relation queries the response was YES. [2022-11-18 19:38:47,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58246 conditions, 20592 events. 2453/20592 cut-off events. For 686257/687054 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 232232 event pairs, 24 based on Foata normal form. 1320/21897 useless extension candidates. Maximal degree in co-relation 56888. Up to 2907 conditions per place. [2022-11-18 19:38:47,307 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 104 selfloop transitions, 822 changer transitions 1/1012 dead transitions. [2022-11-18 19:38:47,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1012 transitions, 13514 flow [2022-11-18 19:38:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 19:38:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-18 19:38:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3740 transitions. [2022-11-18 19:38:47,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8854166666666666 [2022-11-18 19:38:47,315 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3740 transitions. [2022-11-18 19:38:47,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3740 transitions. [2022-11-18 19:38:47,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:47,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3740 transitions. [2022-11-18 19:38:47,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 77.91666666666667) internal successors, (3740), 48 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:47,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 88.0) internal successors, (4312), 49 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:47,354 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 88.0) internal successors, (4312), 49 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:47,354 INFO L175 Difference]: Start difference. First operand has 186 places, 304 transitions, 3409 flow. Second operand 48 states and 3740 transitions. [2022-11-18 19:38:47,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1012 transitions, 13514 flow [2022-11-18 19:38:47,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1012 transitions, 10784 flow, removed 1336 selfloop flow, removed 5 redundant places. [2022-11-18 19:38:47,693 INFO L231 Difference]: Finished difference. Result has 274 places, 920 transitions, 12262 flow [2022-11-18 19:38:47,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=12262, PETRI_PLACES=274, PETRI_TRANSITIONS=920} [2022-11-18 19:38:47,695 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 204 predicate places. [2022-11-18 19:38:47,695 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 920 transitions, 12262 flow [2022-11-18 19:38:47,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:47,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:47,697 INFO L209 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:47,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:47,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:38:47,909 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:38:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:47,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1740336926, now seen corresponding path program 5 times [2022-11-18 19:38:47,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:47,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788208178] [2022-11-18 19:38:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:47,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:50,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:50,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788208178] [2022-11-18 19:38:50,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788208178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:50,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164839326] [2022-11-18 19:38:50,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:38:50,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:50,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:50,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:50,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:38:51,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-18 19:38:51,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 19:38:51,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:51,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:55,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164839326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:55,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:55,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-18 19:38:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053615904] [2022-11-18 19:38:55,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:55,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-18 19:38:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-18 19:38:55,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-18 19:38:55,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-18 19:38:55,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 920 transitions, 12262 flow. Second operand has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:55,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:55,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-18 19:38:55,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:39:23,263 INFO L130 PetriNetUnfolder]: 6679/55057 cut-off events. [2022-11-18 19:39:23,264 INFO L131 PetriNetUnfolder]: For 6086820/6088393 co-relation queries the response was YES. [2022-11-18 19:39:24,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158830 conditions, 55057 events. 6679/55057 cut-off events. For 6086820/6088393 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 664276 event pairs, 24 based on Foata normal form. 2685/57726 useless extension candidates. Maximal degree in co-relation 156067. Up to 7507 conditions per place. [2022-11-18 19:39:24,598 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 200 selfloop transitions, 3214 changer transitions 1/3500 dead transitions. [2022-11-18 19:39:24,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 3500 transitions, 51235 flow [2022-11-18 19:39:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-18 19:39:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-18 19:39:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 7484 transitions. [2022-11-18 19:39:24,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8858901515151515 [2022-11-18 19:39:24,610 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 7484 transitions. [2022-11-18 19:39:24,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 7484 transitions. [2022-11-18 19:39:24,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:39:24,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 7484 transitions. [2022-11-18 19:39:24,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 77.95833333333333) internal successors, (7484), 96 states have internal predecessors, (7484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:24,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 88.0) internal successors, (8536), 97 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:24,643 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 88.0) internal successors, (8536), 97 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:24,643 INFO L175 Difference]: Start difference. First operand has 274 places, 920 transitions, 12262 flow. Second operand 96 states and 7484 transitions. [2022-11-18 19:39:24,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 3500 transitions, 51235 flow [2022-11-18 19:39:26,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 3500 transitions, 40313 flow, removed 5296 selfloop flow, removed 11 redundant places. [2022-11-18 19:39:26,701 INFO L231 Difference]: Finished difference. Result has 452 places, 3312 transitions, 46431 flow [2022-11-18 19:39:26,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=11226, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=46431, PETRI_PLACES=452, PETRI_TRANSITIONS=3312} [2022-11-18 19:39:26,702 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 382 predicate places. [2022-11-18 19:39:26,702 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 3312 transitions, 46431 flow [2022-11-18 19:39:26,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:26,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:39:26,705 INFO L209 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:26,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 19:39:26,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 19:39:26,910 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-18 19:39:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1159091426, now seen corresponding path program 6 times [2022-11-18 19:39:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:39:26,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354031936] [2022-11-18 19:39:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:39:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:36,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:39:36,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354031936] [2022-11-18 19:39:36,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354031936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:39:36,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968444472] [2022-11-18 19:39:36,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:39:36,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:39:36,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:39:36,797 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:39:36,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9ff581-5f19-4264-bd91-67f06b02ed76/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:39:37,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-18 19:39:37,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:37,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 19:39:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:38,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:49,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968444472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:49,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:39:49,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-18 19:39:49,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042123063] [2022-11-18 19:39:49,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:49,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-18 19:39:49,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:39:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-18 19:39:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-18 19:39:49,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-18 19:39:49,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 3312 transitions, 46431 flow. Second operand has 193 states, 193 states have (on average 73.02072538860104) internal successors, (14093), 193 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:49,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:39:49,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-18 19:39:49,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand