./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 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_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a --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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- 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-b5237d8 [2022-11-21 16:44:08,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:44:08,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:44:08,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:44:08,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:44:08,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:44:08,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:44:08,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:44:08,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:44:08,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:44:08,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:44:08,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:44:08,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:44:08,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:44:08,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:44:08,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:44:08,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:44:08,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:44:08,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:44:08,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:44:08,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:44:08,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:44:08,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:44:08,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:44:08,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:44:08,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:44:08,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:44:08,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:44:08,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:44:08,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:44:08,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:44:08,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:44:08,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:44:08,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:44:08,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:44:08,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:44:08,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:44:08,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:44:08,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:44:08,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:44:08,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:44:08,789 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 16:44:08,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:44:08,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:44:08,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:44:08,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:44:08,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:44:08,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:44:08,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:44:08,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:44:08,840 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:44:08,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:44:08,841 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:44:08,842 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:44:08,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:44:08,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:44:08,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:44:08,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:44:08,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:44:08,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:44:08,843 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 16:44:08,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:44:08,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:44:08,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:44:08,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:44:08,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:44:08,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:44:08,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:44:08,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:44:08,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:44:08,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:44:08,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:44:08,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:44:08,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:44:08,848 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:44:08,848 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:44:08,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:44:08,848 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_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-11-21 16:44:09,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:44:09,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:44:09,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:44:09,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:44:09,255 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:44:09,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-21 16:44:12,678 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:44:12,978 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:44:12,979 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-21 16:44:12,988 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/data/571376ba7/91e8e80302f94f6a9b5a37c090d11b44/FLAG1c2667da3 [2022-11-21 16:44:13,012 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/data/571376ba7/91e8e80302f94f6a9b5a37c090d11b44 [2022-11-21 16:44:13,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:44:13,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:44:13,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:44:13,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:44:13,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:44:13,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f301c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13, skipping insertion in model container [2022-11-21 16:44:13,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:44:13,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:44:13,262 WARN L237 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_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-21 16:44:13,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:44:13,273 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:44:13,294 WARN L237 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_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-21 16:44:13,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:44:13,312 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:44:13,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13 WrapperNode [2022-11-21 16:44:13,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:44:13,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:44:13,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:44:13,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:44:13,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,352 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-21 16:44:13,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:44:13,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:44:13,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:44:13,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:44:13,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,379 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:44:13,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:44:13,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:44:13,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:44:13,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (1/1) ... [2022-11-21 16:44:13,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:44:13,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:13,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:44:13,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:44:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:44:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:44:13,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:44:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:44:13,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:44:13,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:44:13,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:44:13,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:44:13,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:44:13,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:44:13,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:44:13,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:44:13,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:44:13,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:44:13,482 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:44:13,652 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:44:13,658 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:44:14,069 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:44:14,216 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:44:14,216 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:44:14,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:44:14 BoogieIcfgContainer [2022-11-21 16:44:14,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:44:14,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:44:14,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:44:14,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:44:14,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:44:13" (1/3) ... [2022-11-21 16:44:14,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b236cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:44:14, skipping insertion in model container [2022-11-21 16:44:14,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:13" (2/3) ... [2022-11-21 16:44:14,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b236cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:44:14, skipping insertion in model container [2022-11-21 16:44:14,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:44:14" (3/3) ... [2022-11-21 16:44:14,233 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-11-21 16:44:14,244 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:44:14,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:44:14,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-21 16:44:14,259 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:44:14,328 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:44:14,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-11-21 16:44:14,446 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-11-21 16:44:14,446 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:44:14,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-21 16:44:14,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 214 flow [2022-11-21 16:44:14,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 79 transitions, 170 flow [2022-11-21 16:44:14,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:44:14,479 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;@3130b18b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:44:14,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-21 16:44:14,498 INFO L130 PetriNetUnfolder]: 2/42 cut-off events. [2022-11-21 16:44:14,498 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:44:14,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:14,500 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] [2022-11-21 16:44:14,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:14,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1185055160, now seen corresponding path program 1 times [2022-11-21 16:44:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:14,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479775270] [2022-11-21 16:44:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:14,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:14,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479775270] [2022-11-21 16:44:14,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479775270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:14,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:44:14,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:44:14,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501557128] [2022-11-21 16:44:14,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:14,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:44:14,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:15,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:44:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:44:15,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-21 16:44:15,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:15,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-21 16:44:15,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:15,163 INFO L130 PetriNetUnfolder]: 28/160 cut-off events. [2022-11-21 16:44:15,164 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-21 16:44:15,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 160 events. 28/160 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 11 based on Foata normal form. 16/137 useless extension candidates. Maximal degree in co-relation 129. Up to 47 conditions per place. [2022-11-21 16:44:15,168 INFO L137 encePairwiseOnDemand]: 88/99 looper letters, 15 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2022-11-21 16:44:15,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 215 flow [2022-11-21 16:44:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:44:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:44:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2022-11-21 16:44:15,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9057239057239057 [2022-11-21 16:44:15,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2022-11-21 16:44:15,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2022-11-21 16:44:15,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:15,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2022-11-21 16:44:15,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,230 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 170 flow. Second operand 3 states and 269 transitions. [2022-11-21 16:44:15,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 215 flow [2022-11-21 16:44:15,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 201 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:44:15,239 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 172 flow [2022-11-21 16:44:15,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2022-11-21 16:44:15,246 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2022-11-21 16:44:15,246 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 172 flow [2022-11-21 16:44:15,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:15,247 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:15,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:44:15,248 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash 671686075, now seen corresponding path program 1 times [2022-11-21 16:44:15,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:15,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662637971] [2022-11-21 16:44:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:15,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:15,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662637971] [2022-11-21 16:44:15,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662637971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:15,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:44:15,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:44:15,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884383450] [2022-11-21 16:44:15,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:15,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:44:15,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:44:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:44:15,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-21 16:44:15,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:15,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-21 16:44:15,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:15,825 INFO L130 PetriNetUnfolder]: 171/416 cut-off events. [2022-11-21 16:44:15,825 INFO L131 PetriNetUnfolder]: For 43/50 co-relation queries the response was YES. [2022-11-21 16:44:15,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 416 events. 171/416 cut-off events. For 43/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2012 event pairs, 26 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 693. Up to 205 conditions per place. [2022-11-21 16:44:15,848 INFO L137 encePairwiseOnDemand]: 93/99 looper letters, 42 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2022-11-21 16:44:15,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 335 flow [2022-11-21 16:44:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:44:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:44:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2022-11-21 16:44:15,851 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8242424242424242 [2022-11-21 16:44:15,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2022-11-21 16:44:15,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2022-11-21 16:44:15,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:15,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2022-11-21 16:44:15,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,857 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,857 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 172 flow. Second operand 5 states and 408 transitions. [2022-11-21 16:44:15,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 335 flow [2022-11-21 16:44:15,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:44:15,860 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 200 flow [2022-11-21 16:44:15,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2022-11-21 16:44:15,861 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2022-11-21 16:44:15,862 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 200 flow [2022-11-21 16:44:15,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:15,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:15,879 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:15,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:44:15,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:15,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832319, now seen corresponding path program 1 times [2022-11-21 16:44:15,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:15,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356337372] [2022-11-21 16:44:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:15,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:16,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356337372] [2022-11-21 16:44:16,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356337372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:16,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29405625] [2022-11-21 16:44:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:16,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:16,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:44:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:44:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:16,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:16,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29405625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:16,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:16,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-21 16:44:16,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431028745] [2022-11-21 16:44:16,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:16,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:44:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:44:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:44:16,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-21 16:44:16,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:16,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:16,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-21 16:44:16,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:16,875 INFO L130 PetriNetUnfolder]: 100/480 cut-off events. [2022-11-21 16:44:16,875 INFO L131 PetriNetUnfolder]: For 82/109 co-relation queries the response was YES. [2022-11-21 16:44:16,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 480 events. 100/480 cut-off events. For 82/109 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2448 event pairs, 5 based on Foata normal form. 6/391 useless extension candidates. Maximal degree in co-relation 649. Up to 101 conditions per place. [2022-11-21 16:44:16,889 INFO L137 encePairwiseOnDemand]: 91/99 looper letters, 31 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2022-11-21 16:44:16,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 411 flow [2022-11-21 16:44:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:44:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:44:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2022-11-21 16:44:16,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8932178932178932 [2022-11-21 16:44:16,897 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2022-11-21 16:44:16,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2022-11-21 16:44:16,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:16,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2022-11-21 16:44:16,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:16,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:16,922 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:16,922 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 200 flow. Second operand 7 states and 619 transitions. [2022-11-21 16:44:16,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 411 flow [2022-11-21 16:44:16,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:44:16,928 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 357 flow [2022-11-21 16:44:16,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2022-11-21 16:44:16,930 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2022-11-21 16:44:16,931 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 357 flow [2022-11-21 16:44:16,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:16,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:16,932 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:16,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:17,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:17,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832320, now seen corresponding path program 1 times [2022-11-21 16:44:17,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:17,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569193921] [2022-11-21 16:44:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:17,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:17,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:17,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569193921] [2022-11-21 16:44:17,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569193921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:17,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052215835] [2022-11-21 16:44:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:17,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:17,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:17,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:17,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:44:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:17,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:44:17,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:17,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:44:17,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052215835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:17,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:44:17,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-21 16:44:17,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044971678] [2022-11-21 16:44:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:17,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:44:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:44:17,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:44:17,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-21 16:44:17,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:17,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:17,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-21 16:44:17,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:17,727 INFO L130 PetriNetUnfolder]: 98/552 cut-off events. [2022-11-21 16:44:17,728 INFO L131 PetriNetUnfolder]: For 926/1209 co-relation queries the response was YES. [2022-11-21 16:44:17,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 552 events. 98/552 cut-off events. For 926/1209 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3106 event pairs, 2 based on Foata normal form. 39/513 useless extension candidates. Maximal degree in co-relation 759. Up to 100 conditions per place. [2022-11-21 16:44:17,735 INFO L137 encePairwiseOnDemand]: 91/99 looper letters, 16 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2022-11-21 16:44:17,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 98 transitions, 461 flow [2022-11-21 16:44:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:44:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:44:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2022-11-21 16:44:17,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2022-11-21 16:44:17,738 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 342 transitions. [2022-11-21 16:44:17,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 342 transitions. [2022-11-21 16:44:17,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:17,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 342 transitions. [2022-11-21 16:44:17,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:17,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:17,742 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:17,742 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 357 flow. Second operand 4 states and 342 transitions. [2022-11-21 16:44:17,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 98 transitions, 461 flow [2022-11-21 16:44:17,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 447 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-21 16:44:17,754 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 453 flow [2022-11-21 16:44:17,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2022-11-21 16:44:17,757 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2022-11-21 16:44:17,758 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 453 flow [2022-11-21 16:44:17,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:17,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:17,759 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:17,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:17,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1250225610, now seen corresponding path program 1 times [2022-11-21 16:44:17,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:17,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489452244] [2022-11-21 16:44:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:17,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:18,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:18,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489452244] [2022-11-21 16:44:18,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489452244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:18,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:44:18,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:44:18,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85957621] [2022-11-21 16:44:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:18,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:44:18,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:44:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:44:18,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 99 [2022-11-21 16:44:18,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:18,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:18,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 99 [2022-11-21 16:44:18,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:18,272 INFO L130 PetriNetUnfolder]: 143/729 cut-off events. [2022-11-21 16:44:18,273 INFO L131 PetriNetUnfolder]: For 2120/2643 co-relation queries the response was YES. [2022-11-21 16:44:18,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1831 conditions, 729 events. 143/729 cut-off events. For 2120/2643 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4748 event pairs, 44 based on Foata normal form. 17/592 useless extension candidates. Maximal degree in co-relation 1143. Up to 229 conditions per place. [2022-11-21 16:44:18,281 INFO L137 encePairwiseOnDemand]: 95/99 looper letters, 42 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2022-11-21 16:44:18,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 666 flow [2022-11-21 16:44:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:44:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:44:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-21 16:44:18,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8754208754208754 [2022-11-21 16:44:18,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-21 16:44:18,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-21 16:44:18,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:18,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-21 16:44:18,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:18,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:18,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:18,286 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 453 flow. Second operand 3 states and 260 transitions. [2022-11-21 16:44:18,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 666 flow [2022-11-21 16:44:18,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 110 transitions, 605 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-11-21 16:44:18,294 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 479 flow [2022-11-21 16:44:18,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2022-11-21 16:44:18,295 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2022-11-21 16:44:18,295 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 479 flow [2022-11-21 16:44:18,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:18,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:18,296 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:18,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:44:18,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash 44078018, now seen corresponding path program 1 times [2022-11-21 16:44:18,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300417292] [2022-11-21 16:44:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:18,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:18,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300417292] [2022-11-21 16:44:18,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300417292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013318479] [2022-11-21 16:44:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:18,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:18,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:18,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:18,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:44:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:44:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:18,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:18,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013318479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:18,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:18,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 16:44:18,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572271985] [2022-11-21 16:44:18,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:18,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:44:18,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:44:18,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:44:18,624 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-21 16:44:18,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 479 flow. Second operand has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:18,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:18,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-21 16:44:18,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:19,498 INFO L130 PetriNetUnfolder]: 730/2013 cut-off events. [2022-11-21 16:44:19,498 INFO L131 PetriNetUnfolder]: For 5108/5158 co-relation queries the response was YES. [2022-11-21 16:44:19,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7099 conditions, 2013 events. 730/2013 cut-off events. For 5108/5158 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 14206 event pairs, 31 based on Foata normal form. 104/1737 useless extension candidates. Maximal degree in co-relation 5363. Up to 633 conditions per place. [2022-11-21 16:44:19,524 INFO L137 encePairwiseOnDemand]: 92/99 looper letters, 277 selfloop transitions, 18 changer transitions 0/348 dead transitions. [2022-11-21 16:44:19,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 348 transitions, 3356 flow [2022-11-21 16:44:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:44:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 16:44:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1430 transitions. [2022-11-21 16:44:19,536 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8024691358024691 [2022-11-21 16:44:19,536 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1430 transitions. [2022-11-21 16:44:19,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1430 transitions. [2022-11-21 16:44:19,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:19,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1430 transitions. [2022-11-21 16:44:19,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 79.44444444444444) internal successors, (1430), 18 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:19,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 99.0) internal successors, (1881), 19 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:19,551 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 99.0) internal successors, (1881), 19 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:19,551 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 479 flow. Second operand 18 states and 1430 transitions. [2022-11-21 16:44:19,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 348 transitions, 3356 flow [2022-11-21 16:44:19,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 348 transitions, 3333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:44:19,578 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 580 flow [2022-11-21 16:44:19,579 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=580, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2022-11-21 16:44:19,582 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 39 predicate places. [2022-11-21 16:44:19,582 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 580 flow [2022-11-21 16:44:19,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:19,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:19,583 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:19,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:19,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:19,790 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1366418868, now seen corresponding path program 1 times [2022-11-21 16:44:19,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:19,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52987272] [2022-11-21 16:44:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:19,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:19,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52987272] [2022-11-21 16:44:19,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52987272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689099324] [2022-11-21 16:44:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:19,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:19,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:19,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:19,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:44:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:19,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:44:19,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:20,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:44:20,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689099324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:20,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:44:20,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 16:44:20,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817641437] [2022-11-21 16:44:20,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:20,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:44:20,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:20,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:44:20,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:44:20,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-21 16:44:20,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:20,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:20,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-21 16:44:20,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:20,533 INFO L130 PetriNetUnfolder]: 655/1819 cut-off events. [2022-11-21 16:44:20,533 INFO L131 PetriNetUnfolder]: For 5187/5272 co-relation queries the response was YES. [2022-11-21 16:44:20,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 1819 events. 655/1819 cut-off events. For 5187/5272 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12603 event pairs, 101 based on Foata normal form. 134/1599 useless extension candidates. Maximal degree in co-relation 5717. Up to 641 conditions per place. [2022-11-21 16:44:20,552 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 87 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2022-11-21 16:44:20,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 1130 flow [2022-11-21 16:44:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:44:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:44:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 553 transitions. [2022-11-21 16:44:20,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2022-11-21 16:44:20,555 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 553 transitions. [2022-11-21 16:44:20,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 553 transitions. [2022-11-21 16:44:20,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:20,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 553 transitions. [2022-11-21 16:44:20,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:20,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:20,560 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:20,560 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 580 flow. Second operand 7 states and 553 transitions. [2022-11-21 16:44:20,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 1130 flow [2022-11-21 16:44:20,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 151 transitions, 1098 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-21 16:44:20,577 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 543 flow [2022-11-21 16:44:20,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2022-11-21 16:44:20,578 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 35 predicate places. [2022-11-21 16:44:20,579 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 543 flow [2022-11-21 16:44:20,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:20,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:20,579 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:20,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:20,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:20,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:20,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1505486264, now seen corresponding path program 1 times [2022-11-21 16:44:20,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:20,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292319003] [2022-11-21 16:44:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:20,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:20,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:20,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292319003] [2022-11-21 16:44:20,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292319003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838816884] [2022-11-21 16:44:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:20,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:20,932 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:20,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:44:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:21,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:44:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:21,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:21,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838816884] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:21,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:44:21,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-11-21 16:44:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703843887] [2022-11-21 16:44:21,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:21,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:44:21,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:44:21,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:44:21,279 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 99 [2022-11-21 16:44:21,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 543 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:21,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:21,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 99 [2022-11-21 16:44:21,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:21,563 INFO L130 PetriNetUnfolder]: 220/1082 cut-off events. [2022-11-21 16:44:21,565 INFO L131 PetriNetUnfolder]: For 2446/3042 co-relation queries the response was YES. [2022-11-21 16:44:21,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 1082 events. 220/1082 cut-off events. For 2446/3042 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8211 event pairs, 105 based on Foata normal form. 26/858 useless extension candidates. Maximal degree in co-relation 2092. Up to 455 conditions per place. [2022-11-21 16:44:21,573 INFO L137 encePairwiseOnDemand]: 95/99 looper letters, 38 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2022-11-21 16:44:21,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 112 transitions, 640 flow [2022-11-21 16:44:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:44:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:44:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2022-11-21 16:44:21,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8257575757575758 [2022-11-21 16:44:21,576 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2022-11-21 16:44:21,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2022-11-21 16:44:21,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:21,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2022-11-21 16:44:21,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:21,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:21,579 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:21,579 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 543 flow. Second operand 4 states and 327 transitions. [2022-11-21 16:44:21,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 112 transitions, 640 flow [2022-11-21 16:44:21,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 112 transitions, 626 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:44:21,588 INFO L231 Difference]: Finished difference. Result has 115 places, 106 transitions, 520 flow [2022-11-21 16:44:21,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=115, PETRI_TRANSITIONS=106} [2022-11-21 16:44:21,592 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 34 predicate places. [2022-11-21 16:44:21,592 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 106 transitions, 520 flow [2022-11-21 16:44:21,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:21,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:21,593 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:21,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:21,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-21 16:44:21,805 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash -7855593, now seen corresponding path program 1 times [2022-11-21 16:44:21,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:21,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755004104] [2022-11-21 16:44:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:21,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:21,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755004104] [2022-11-21 16:44:21,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755004104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875901865] [2022-11-21 16:44:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:21,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:21,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:21,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:21,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:44:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:22,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:44:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:44:22,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:44:22,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875901865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:22,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:22,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-21 16:44:22,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536090544] [2022-11-21 16:44:22,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:22,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:44:22,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:22,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:44:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:44:22,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 99 [2022-11-21 16:44:22,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 106 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 70.625) internal successors, (565), 8 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:22,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:22,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 99 [2022-11-21 16:44:22,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:22,608 INFO L130 PetriNetUnfolder]: 250/1331 cut-off events. [2022-11-21 16:44:22,609 INFO L131 PetriNetUnfolder]: For 2631/3024 co-relation queries the response was YES. [2022-11-21 16:44:22,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3133 conditions, 1331 events. 250/1331 cut-off events. For 2631/3024 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10814 event pairs, 64 based on Foata normal form. 75/1144 useless extension candidates. Maximal degree in co-relation 2909. Up to 237 conditions per place. [2022-11-21 16:44:22,619 INFO L137 encePairwiseOnDemand]: 90/99 looper letters, 64 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2022-11-21 16:44:22,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 145 transitions, 879 flow [2022-11-21 16:44:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:44:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 16:44:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 592 transitions. [2022-11-21 16:44:22,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7474747474747475 [2022-11-21 16:44:22,622 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 592 transitions. [2022-11-21 16:44:22,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 592 transitions. [2022-11-21 16:44:22,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:22,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 592 transitions. [2022-11-21 16:44:22,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:22,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 99.0) internal successors, (891), 9 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:22,627 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 99.0) internal successors, (891), 9 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:22,628 INFO L175 Difference]: Start difference. First operand has 115 places, 106 transitions, 520 flow. Second operand 8 states and 592 transitions. [2022-11-21 16:44:22,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 145 transitions, 879 flow [2022-11-21 16:44:22,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 145 transitions, 865 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-21 16:44:22,637 INFO L231 Difference]: Finished difference. Result has 121 places, 108 transitions, 582 flow [2022-11-21 16:44:22,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=582, PETRI_PLACES=121, PETRI_TRANSITIONS=108} [2022-11-21 16:44:22,638 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 40 predicate places. [2022-11-21 16:44:22,638 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 108 transitions, 582 flow [2022-11-21 16:44:22,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.625) internal successors, (565), 8 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:22,639 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:22,639 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:22,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:22,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1688134863, now seen corresponding path program 1 times [2022-11-21 16:44:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212298911] [2022-11-21 16:44:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:23,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:23,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212298911] [2022-11-21 16:44:23,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212298911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:23,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:44:23,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:44:23,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437494045] [2022-11-21 16:44:23,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:23,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:44:23,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:23,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:44:23,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:44:23,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2022-11-21 16:44:23,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 108 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 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) [2022-11-21 16:44:23,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:23,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2022-11-21 16:44:23,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:23,592 INFO L130 PetriNetUnfolder]: 701/2301 cut-off events. [2022-11-21 16:44:23,593 INFO L131 PetriNetUnfolder]: For 5053/5077 co-relation queries the response was YES. [2022-11-21 16:44:23,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6573 conditions, 2301 events. 701/2301 cut-off events. For 5053/5077 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 17746 event pairs, 456 based on Foata normal form. 24/2155 useless extension candidates. Maximal degree in co-relation 6240. Up to 1451 conditions per place. [2022-11-21 16:44:23,612 INFO L137 encePairwiseOnDemand]: 93/99 looper letters, 63 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2022-11-21 16:44:23,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 118 transitions, 791 flow [2022-11-21 16:44:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:44:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:44:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 377 transitions. [2022-11-21 16:44:23,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6346801346801347 [2022-11-21 16:44:23,615 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 377 transitions. [2022-11-21 16:44:23,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 377 transitions. [2022-11-21 16:44:23,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:23,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 377 transitions. [2022-11-21 16:44:23,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:23,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:23,619 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:23,619 INFO L175 Difference]: Start difference. First operand has 121 places, 108 transitions, 582 flow. Second operand 6 states and 377 transitions. [2022-11-21 16:44:23,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 118 transitions, 791 flow [2022-11-21 16:44:23,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 775 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-21 16:44:23,635 INFO L231 Difference]: Finished difference. Result has 124 places, 108 transitions, 582 flow [2022-11-21 16:44:23,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=582, PETRI_PLACES=124, PETRI_TRANSITIONS=108} [2022-11-21 16:44:23,637 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2022-11-21 16:44:23,638 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 108 transitions, 582 flow [2022-11-21 16:44:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 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) [2022-11-21 16:44:23,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:23,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:23,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:44:23,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -825592294, now seen corresponding path program 1 times [2022-11-21 16:44:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043384875] [2022-11-21 16:44:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:23,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:23,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:23,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043384875] [2022-11-21 16:44:23,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043384875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:23,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999464211] [2022-11-21 16:44:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:23,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:23,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:23,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:23,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:44:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:44:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:44:24,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:44:24,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999464211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:24,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:44:24,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2022-11-21 16:44:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572589184] [2022-11-21 16:44:24,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:24,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:44:24,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:24,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:44:24,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:44:24,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2022-11-21 16:44:24,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 108 transitions, 582 flow. Second operand has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:24,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:24,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2022-11-21 16:44:24,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:24,952 INFO L130 PetriNetUnfolder]: 448/1819 cut-off events. [2022-11-21 16:44:24,953 INFO L131 PetriNetUnfolder]: For 3018/3040 co-relation queries the response was YES. [2022-11-21 16:44:24,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4834 conditions, 1819 events. 448/1819 cut-off events. For 3018/3040 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 14721 event pairs, 295 based on Foata normal form. 22/1746 useless extension candidates. Maximal degree in co-relation 4544. Up to 980 conditions per place. [2022-11-21 16:44:24,978 INFO L137 encePairwiseOnDemand]: 92/99 looper letters, 43 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2022-11-21 16:44:24,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 107 transitions, 678 flow [2022-11-21 16:44:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:44:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:44:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 425 transitions. [2022-11-21 16:44:24,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6132756132756133 [2022-11-21 16:44:24,981 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 425 transitions. [2022-11-21 16:44:24,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 425 transitions. [2022-11-21 16:44:24,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:24,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 425 transitions. [2022-11-21 16:44:24,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.714285714285715) internal successors, (425), 7 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:24,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:24,986 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:24,987 INFO L175 Difference]: Start difference. First operand has 124 places, 108 transitions, 582 flow. Second operand 7 states and 425 transitions. [2022-11-21 16:44:24,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 107 transitions, 678 flow [2022-11-21 16:44:25,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 107 transitions, 668 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:44:25,005 INFO L231 Difference]: Finished difference. Result has 124 places, 107 transitions, 582 flow [2022-11-21 16:44:25,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=582, PETRI_PLACES=124, PETRI_TRANSITIONS=107} [2022-11-21 16:44:25,006 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2022-11-21 16:44:25,006 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 107 transitions, 582 flow [2022-11-21 16:44:25,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:25,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:25,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:25,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:25,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:25,220 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash 176442899, now seen corresponding path program 1 times [2022-11-21 16:44:25,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:25,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893732018] [2022-11-21 16:44:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:25,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:25,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:25,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893732018] [2022-11-21 16:44:25,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893732018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548782705] [2022-11-21 16:44:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:25,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:25,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:25,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:25,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:44:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:25,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:44:25,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:25,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:25,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548782705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:25,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:25,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-21 16:44:25,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222376777] [2022-11-21 16:44:25,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:25,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:44:25,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:25,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:44:25,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:44:25,750 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2022-11-21 16:44:25,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 107 transitions, 582 flow. Second operand has 15 states, 15 states have (on average 64.86666666666666) internal successors, (973), 15 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:25,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:25,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2022-11-21 16:44:25,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:26,628 INFO L130 PetriNetUnfolder]: 822/2661 cut-off events. [2022-11-21 16:44:26,629 INFO L131 PetriNetUnfolder]: For 5882/5882 co-relation queries the response was YES. [2022-11-21 16:44:26,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7685 conditions, 2661 events. 822/2661 cut-off events. For 5882/5882 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 21071 event pairs, 183 based on Foata normal form. 37/2682 useless extension candidates. Maximal degree in co-relation 7616. Up to 962 conditions per place. [2022-11-21 16:44:26,647 INFO L137 encePairwiseOnDemand]: 88/99 looper letters, 114 selfloop transitions, 23 changer transitions 17/200 dead transitions. [2022-11-21 16:44:26,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 200 transitions, 1584 flow [2022-11-21 16:44:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:44:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:44:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 939 transitions. [2022-11-21 16:44:26,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6774891774891775 [2022-11-21 16:44:26,651 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 939 transitions. [2022-11-21 16:44:26,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 939 transitions. [2022-11-21 16:44:26,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:26,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 939 transitions. [2022-11-21 16:44:26,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 67.07142857142857) internal successors, (939), 14 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:26,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:26,659 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:26,659 INFO L175 Difference]: Start difference. First operand has 124 places, 107 transitions, 582 flow. Second operand 14 states and 939 transitions. [2022-11-21 16:44:26,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 200 transitions, 1584 flow [2022-11-21 16:44:26,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 1573 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:44:26,678 INFO L231 Difference]: Finished difference. Result has 136 places, 118 transitions, 791 flow [2022-11-21 16:44:26,678 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=791, PETRI_PLACES=136, PETRI_TRANSITIONS=118} [2022-11-21 16:44:26,679 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 55 predicate places. [2022-11-21 16:44:26,679 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 118 transitions, 791 flow [2022-11-21 16:44:26,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.86666666666666) internal successors, (973), 15 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:26,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:26,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:26,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:26,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 16:44:26,887 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1218228744, now seen corresponding path program 2 times [2022-11-21 16:44:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755193025] [2022-11-21 16:44:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:27,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:27,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755193025] [2022-11-21 16:44:27,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755193025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:27,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263406569] [2022-11-21 16:44:27,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:44:27,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:27,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:27,011 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:27,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:44:27,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:44:27,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:44:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:44:27,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:27,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:27,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263406569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:27,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:27,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-21 16:44:27,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961378088] [2022-11-21 16:44:27,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:27,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:44:27,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:44:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:44:27,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-21 16:44:27,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 118 transitions, 791 flow. Second operand has 13 states, 13 states have (on average 81.3076923076923) internal successors, (1057), 13 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:27,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:27,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-21 16:44:27,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:27,915 INFO L130 PetriNetUnfolder]: 228/1624 cut-off events. [2022-11-21 16:44:27,915 INFO L131 PetriNetUnfolder]: For 8007/8439 co-relation queries the response was YES. [2022-11-21 16:44:27,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4841 conditions, 1624 events. 228/1624 cut-off events. For 8007/8439 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 11879 event pairs, 11 based on Foata normal form. 285/1885 useless extension candidates. Maximal degree in co-relation 4776. Up to 194 conditions per place. [2022-11-21 16:44:27,932 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 47 selfloop transitions, 78 changer transitions 0/206 dead transitions. [2022-11-21 16:44:27,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 206 transitions, 1993 flow [2022-11-21 16:44:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:44:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:44:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1110 transitions. [2022-11-21 16:44:27,936 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8624708624708625 [2022-11-21 16:44:27,937 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1110 transitions. [2022-11-21 16:44:27,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1110 transitions. [2022-11-21 16:44:27,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:27,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1110 transitions. [2022-11-21 16:44:27,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 85.38461538461539) internal successors, (1110), 13 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:27,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:27,946 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:27,947 INFO L175 Difference]: Start difference. First operand has 136 places, 118 transitions, 791 flow. Second operand 13 states and 1110 transitions. [2022-11-21 16:44:27,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 206 transitions, 1993 flow [2022-11-21 16:44:27,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 206 transitions, 1978 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-11-21 16:44:27,972 INFO L231 Difference]: Finished difference. Result has 150 places, 186 transitions, 2065 flow [2022-11-21 16:44:27,972 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2065, PETRI_PLACES=150, PETRI_TRANSITIONS=186} [2022-11-21 16:44:27,974 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 69 predicate places. [2022-11-21 16:44:27,974 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 186 transitions, 2065 flow [2022-11-21 16:44:27,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 81.3076923076923) internal successors, (1057), 13 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:27,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:27,975 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:27,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:28,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:44:28,183 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1808259579, now seen corresponding path program 2 times [2022-11-21 16:44:28,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:28,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353305948] [2022-11-21 16:44:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:28,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353305948] [2022-11-21 16:44:28,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353305948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051008955] [2022-11-21 16:44:28,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:44:28,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:28,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:28,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:28,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:44:28,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:44:28,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:44:28,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:44:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-21 16:44:28,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-21 16:44:28,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051008955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:28,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:28,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-21 16:44:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912505041] [2022-11-21 16:44:28,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:44:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:28,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:44:28,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:44:28,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2022-11-21 16:44:28,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 186 transitions, 2065 flow. Second operand has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:28,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:28,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2022-11-21 16:44:28,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:30,329 INFO L130 PetriNetUnfolder]: 1088/3161 cut-off events. [2022-11-21 16:44:30,329 INFO L131 PetriNetUnfolder]: For 40131/40935 co-relation queries the response was YES. [2022-11-21 16:44:30,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15094 conditions, 3161 events. 1088/3161 cut-off events. For 40131/40935 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 22434 event pairs, 19 based on Foata normal form. 435/3591 useless extension candidates. Maximal degree in co-relation 15017. Up to 943 conditions per place. [2022-11-21 16:44:30,372 INFO L137 encePairwiseOnDemand]: 90/99 looper letters, 454 selfloop transitions, 25 changer transitions 6/536 dead transitions. [2022-11-21 16:44:30,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 536 transitions, 8265 flow [2022-11-21 16:44:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:44:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-21 16:44:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1450 transitions. [2022-11-21 16:44:30,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6657483930211203 [2022-11-21 16:44:30,378 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1450 transitions. [2022-11-21 16:44:30,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1450 transitions. [2022-11-21 16:44:30,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:30,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1450 transitions. [2022-11-21 16:44:30,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.9090909090909) internal successors, (1450), 22 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:30,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:30,389 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:30,390 INFO L175 Difference]: Start difference. First operand has 150 places, 186 transitions, 2065 flow. Second operand 22 states and 1450 transitions. [2022-11-21 16:44:30,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 536 transitions, 8265 flow [2022-11-21 16:44:30,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 536 transitions, 7623 flow, removed 298 selfloop flow, removed 6 redundant places. [2022-11-21 16:44:30,468 INFO L231 Difference]: Finished difference. Result has 165 places, 188 transitions, 1899 flow [2022-11-21 16:44:30,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1899, PETRI_PLACES=165, PETRI_TRANSITIONS=188} [2022-11-21 16:44:30,469 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 84 predicate places. [2022-11-21 16:44:30,469 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 188 transitions, 1899 flow [2022-11-21 16:44:30,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:30,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:30,470 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:30,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:30,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:44:30,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:30,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1008065624, now seen corresponding path program 3 times [2022-11-21 16:44:30,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:30,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674952542] [2022-11-21 16:44:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:30,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:30,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674952542] [2022-11-21 16:44:30,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674952542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:30,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063860535] [2022-11-21 16:44:30,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:44:30,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:30,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:30,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:30,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:44:31,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 16:44:31,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:44:31,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:44:31,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:31,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:31,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063860535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:31,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:31,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-21 16:44:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096661520] [2022-11-21 16:44:31,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:44:31,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:44:31,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:44:31,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-21 16:44:31,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 188 transitions, 1899 flow. Second operand has 25 states, 25 states have (on average 81.16) internal successors, (2029), 25 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:31,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:31,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-21 16:44:31,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:33,236 INFO L130 PetriNetUnfolder]: 566/4020 cut-off events. [2022-11-21 16:44:33,236 INFO L131 PetriNetUnfolder]: For 48273/49614 co-relation queries the response was YES. [2022-11-21 16:44:33,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12917 conditions, 4020 events. 566/4020 cut-off events. For 48273/49614 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 32655 event pairs, 11 based on Foata normal form. 903/4887 useless extension candidates. Maximal degree in co-relation 12845. Up to 516 conditions per place. [2022-11-21 16:44:33,275 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 73 selfloop transitions, 284 changer transitions 0/442 dead transitions. [2022-11-21 16:44:33,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 442 transitions, 5442 flow [2022-11-21 16:44:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-21 16:44:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-21 16:44:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2142 transitions. [2022-11-21 16:44:33,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8654545454545455 [2022-11-21 16:44:33,281 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2142 transitions. [2022-11-21 16:44:33,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2142 transitions. [2022-11-21 16:44:33,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:33,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2142 transitions. [2022-11-21 16:44:33,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 85.68) internal successors, (2142), 25 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:33,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:33,295 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:33,295 INFO L175 Difference]: Start difference. First operand has 165 places, 188 transitions, 1899 flow. Second operand 25 states and 2142 transitions. [2022-11-21 16:44:33,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 442 transitions, 5442 flow [2022-11-21 16:44:33,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 442 transitions, 5382 flow, removed 3 selfloop flow, removed 15 redundant places. [2022-11-21 16:44:33,375 INFO L231 Difference]: Finished difference. Result has 196 places, 398 transitions, 5843 flow [2022-11-21 16:44:33,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5843, PETRI_PLACES=196, PETRI_TRANSITIONS=398} [2022-11-21 16:44:33,377 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 115 predicate places. [2022-11-21 16:44:33,377 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 398 transitions, 5843 flow [2022-11-21 16:44:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.16) internal successors, (2029), 25 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:33,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:33,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:33,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:33,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:44:33,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:33,587 INFO L85 PathProgramCache]: Analyzing trace with hash -883355368, now seen corresponding path program 4 times [2022-11-21 16:44:33,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:33,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732101925] [2022-11-21 16:44:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:33,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:34,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:34,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732101925] [2022-11-21 16:44:34,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732101925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:34,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331598763] [2022-11-21 16:44:34,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:44:34,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:34,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:34,679 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:34,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:44:34,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:44:34,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:44:34,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 16:44:34,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:35,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:36,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331598763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:36,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:36,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-21 16:44:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542866233] [2022-11-21 16:44:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:36,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 16:44:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 16:44:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 16:44:36,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-21 16:44:36,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 398 transitions, 5843 flow. Second operand has 49 states, 49 states have (on average 81.08163265306122) internal successors, (3973), 49 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:36,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:36,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-21 16:44:36,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:44:41,208 INFO L130 PetriNetUnfolder]: 1423/10047 cut-off events. [2022-11-21 16:44:41,209 INFO L131 PetriNetUnfolder]: For 576294/581213 co-relation queries the response was YES. [2022-11-21 16:44:41,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33683 conditions, 10047 events. 1423/10047 cut-off events. For 576294/581213 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 87875 event pairs, 11 based on Foata normal form. 2927/12914 useless extension candidates. Maximal degree in co-relation 33589. Up to 1574 conditions per place. [2022-11-21 16:44:41,325 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 123 selfloop transitions, 996 changer transitions 0/1204 dead transitions. [2022-11-21 16:44:41,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1204 transitions, 19086 flow [2022-11-21 16:44:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 16:44:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-21 16:44:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4206 transitions. [2022-11-21 16:44:41,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8670377241805813 [2022-11-21 16:44:41,334 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4206 transitions. [2022-11-21 16:44:41,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4206 transitions. [2022-11-21 16:44:41,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:44:41,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4206 transitions. [2022-11-21 16:44:41,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 85.83673469387755) internal successors, (4206), 49 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:41,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 99.0) internal successors, (4950), 50 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:41,368 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 99.0) internal successors, (4950), 50 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:41,369 INFO L175 Difference]: Start difference. First operand has 196 places, 398 transitions, 5843 flow. Second operand 49 states and 4206 transitions. [2022-11-21 16:44:41,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1204 transitions, 19086 flow [2022-11-21 16:44:41,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1204 transitions, 16354 flow, removed 1327 selfloop flow, removed 5 redundant places. [2022-11-21 16:44:41,951 INFO L231 Difference]: Finished difference. Result has 285 places, 1112 transitions, 18163 flow [2022-11-21 16:44:41,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18163, PETRI_PLACES=285, PETRI_TRANSITIONS=1112} [2022-11-21 16:44:41,952 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 204 predicate places. [2022-11-21 16:44:41,952 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1112 transitions, 18163 flow [2022-11-21 16:44:41,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 81.08163265306122) internal successors, (3973), 49 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:41,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:44:41,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:41,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:42,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:44:42,162 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:44:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1346381160, now seen corresponding path program 5 times [2022-11-21 16:44:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:42,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574301915] [2022-11-21 16:44:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:42,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:45,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:45,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574301915] [2022-11-21 16:44:45,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574301915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:44:45,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601938527] [2022-11-21 16:44:45,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:44:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:45,586 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:45,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:44:45,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-21 16:44:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:44:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-21 16:44:45,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:46,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:44:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:50,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601938527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:44:50,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:44:50,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-21 16:44:50,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555791338] [2022-11-21 16:44:50,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:44:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-21 16:44:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:50,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-21 16:44:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-21 16:44:50,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-21 16:44:50,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1112 transitions, 18163 flow. Second operand has 97 states, 97 states have (on average 81.04123711340206) internal successors, (7861), 97 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:50,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:44:50,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-21 16:44:50,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:11,198 INFO L130 PetriNetUnfolder]: 4297/29347 cut-off events. [2022-11-21 16:45:11,198 INFO L131 PetriNetUnfolder]: For 5757002/5776144 co-relation queries the response was YES. [2022-11-21 16:45:11,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100456 conditions, 29347 events. 4297/29347 cut-off events. For 5757002/5776144 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 288979 event pairs, 11 based on Foata normal form. 10645/39884 useless extension candidates. Maximal degree in co-relation 100319. Up to 4866 conditions per place. [2022-11-21 16:45:11,658 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 221 selfloop transitions, 3580 changer transitions 0/3886 dead transitions. [2022-11-21 16:45:11,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 3886 transitions, 64550 flow [2022-11-21 16:45:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-21 16:45:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-21 16:45:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8334 transitions. [2022-11-21 16:45:11,672 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8678537956888472 [2022-11-21 16:45:11,673 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8334 transitions. [2022-11-21 16:45:11,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8334 transitions. [2022-11-21 16:45:11,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:11,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8334 transitions. [2022-11-21 16:45:11,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 85.91752577319588) internal successors, (8334), 97 states have internal predecessors, (8334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:11,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 99.0) internal successors, (9702), 98 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:11,717 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 99.0) internal successors, (9702), 98 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:11,718 INFO L175 Difference]: Start difference. First operand has 285 places, 1112 transitions, 18163 flow. Second operand 97 states and 8334 transitions. [2022-11-21 16:45:11,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 3886 transitions, 64550 flow [2022-11-21 16:45:14,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 3886 transitions, 54779 flow, removed 4687 selfloop flow, removed 11 redundant places. [2022-11-21 16:45:14,191 INFO L231 Difference]: Finished difference. Result has 464 places, 3698 transitions, 61608 flow [2022-11-21 16:45:14,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=16646, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=61608, PETRI_PLACES=464, PETRI_TRANSITIONS=3698} [2022-11-21 16:45:14,193 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 383 predicate places. [2022-11-21 16:45:14,193 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 3698 transitions, 61608 flow [2022-11-21 16:45:14,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 81.04123711340206) internal successors, (7861), 97 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:14,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:14,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:14,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:14,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:45:14,403 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 16:45:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 122613144, now seen corresponding path program 6 times [2022-11-21 16:45:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007183011] [2022-11-21 16:45:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:24,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:24,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007183011] [2022-11-21 16:45:24,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007183011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:45:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546605199] [2022-11-21 16:45:24,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:45:24,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:24,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:24,085 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:24,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b95ad9d-0376-42a6-8e26-e56d9d9fd110/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:45:24,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-21 16:45:24,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:45:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-21 16:45:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:26,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:38,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546605199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:38,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:45:38,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-21 16:45:38,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690645925] [2022-11-21 16:45:38,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:38,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-21 16:45:38,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-21 16:45:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-21 16:45:38,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-21 16:45:38,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 3698 transitions, 61608 flow. Second operand has 193 states, 193 states have (on average 81.02072538860104) internal successors, (15637), 193 states have internal predecessors, (15637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:38,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-21 16:45:38,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand