./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:30:21,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:30:21,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:30:21,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:30:21,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:30:21,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:30:21,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:30:21,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:30:21,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:30:21,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:30:21,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:30:21,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:30:21,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:30:21,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:30:21,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:30:21,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:30:21,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:30:21,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:30:21,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:30:21,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:30:21,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:30:21,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:30:21,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:30:21,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:30:21,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:30:21,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:30:21,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:30:21,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:30:21,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:30:21,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:30:21,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:30:21,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:30:21,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:30:21,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:30:21,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:30:21,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:30:21,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:30:21,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:30:21,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:30:21,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:30:21,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:30:21,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:30:21,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:30:21,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:30:21,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:30:21,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:30:21,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:30:21,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:30:21,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:30:21,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:30:21,175 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:30:21,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:30:21,176 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:30:21,176 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:30:21,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:30:21,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:30:21,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:30:21,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:30:21,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:30:21,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:30:21,178 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:30:21,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:30:21,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:30:21,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:30:21,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:30:21,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:30:21,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:30:21,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:30:21,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:30:21,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:30:21,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:30:21,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:30:21,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:30:21,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:30:21,180 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:30:21,181 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:30:21,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:30:21,181 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_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2022-11-16 11:30:21,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:30:21,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:30:21,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:30:21,542 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:30:21,543 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:30:21,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-11-16 11:30:21,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/data/23d71b4e2/1f56f9a6583a4b0c9900a46a3032feb4/FLAGc608921f0 [2022-11-16 11:30:22,134 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:30:22,135 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-11-16 11:30:22,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/data/23d71b4e2/1f56f9a6583a4b0c9900a46a3032feb4/FLAGc608921f0 [2022-11-16 11:30:22,631 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/data/23d71b4e2/1f56f9a6583a4b0c9900a46a3032feb4 [2022-11-16 11:30:22,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:30:22,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:30:22,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:30:22,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:30:22,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:30:22,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:30:22" (1/1) ... [2022-11-16 11:30:22,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea86d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:22, skipping insertion in model container [2022-11-16 11:30:22,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:30:22" (1/1) ... [2022-11-16 11:30:22,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:30:22,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:30:23,142 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2022-11-16 11:30:23,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:30:23,157 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:30:23,203 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2022-11-16 11:30:23,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:30:23,236 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:30:23,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23 WrapperNode [2022-11-16 11:30:23,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:30:23,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:30:23,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:30:23,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:30:23,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,272 INFO L138 Inliner]: procedures = 167, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2022-11-16 11:30:23,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:30:23,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:30:23,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:30:23,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:30:23,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,308 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:30:23,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:30:23,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:30:23,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:30:23,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (1/1) ... [2022-11-16 11:30:23,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:30:23,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:23,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:30:23,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:30:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-16 11:30:23,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-16 11:30:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:30:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:30:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:30:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:30:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:30:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:30:23,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:30:23,410 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:30:23,562 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:30:23,564 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:30:23,802 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:30:23,809 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:30:23,809 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:30:23,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:30:23 BoogieIcfgContainer [2022-11-16 11:30:23,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:30:23,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:30:23,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:30:23,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:30:23,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:30:22" (1/3) ... [2022-11-16 11:30:23,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f207c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:30:23, skipping insertion in model container [2022-11-16 11:30:23,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:23" (2/3) ... [2022-11-16 11:30:23,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f207c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:30:23, skipping insertion in model container [2022-11-16 11:30:23,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:30:23" (3/3) ... [2022-11-16 11:30:23,849 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2022-11-16 11:30:23,857 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:30:23,867 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:30:23,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-16 11:30:23,868 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:30:23,957 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 11:30:23,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 83 transitions, 171 flow [2022-11-16 11:30:24,070 INFO L130 PetriNetUnfolder]: 10/94 cut-off events. [2022-11-16 11:30:24,074 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:30:24,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 10/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 129 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-11-16 11:30:24,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 83 transitions, 171 flow [2022-11-16 11:30:24,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 83 transitions, 171 flow [2022-11-16 11:30:24,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:30:24,117 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;@55264cdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:30:24,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-16 11:30:24,133 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2022-11-16 11:30:24,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:30:24,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:24,134 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] [2022-11-16 11:30:24,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2022-11-16 11:30:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:24,140 INFO L85 PathProgramCache]: Analyzing trace with hash -268632177, now seen corresponding path program 1 times [2022-11-16 11:30:24,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:24,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322195157] [2022-11-16 11:30:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:30:24,266 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:30:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:30:24,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:30:24,306 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:30:24,307 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 17 remaining) [2022-11-16 11:30:24,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 17 remaining) [2022-11-16 11:30:24,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 17 remaining) [2022-11-16 11:30:24,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 17 remaining) [2022-11-16 11:30:24,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 17 remaining) [2022-11-16 11:30:24,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 17 remaining) [2022-11-16 11:30:24,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 17 remaining) [2022-11-16 11:30:24,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 17 remaining) [2022-11-16 11:30:24,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 17 remaining) [2022-11-16 11:30:24,317 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 17 remaining) [2022-11-16 11:30:24,317 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 17 remaining) [2022-11-16 11:30:24,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 17 remaining) [2022-11-16 11:30:24,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 17 remaining) [2022-11-16 11:30:24,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 17 remaining) [2022-11-16 11:30:24,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 17 remaining) [2022-11-16 11:30:24,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 17 remaining) [2022-11-16 11:30:24,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 17 remaining) [2022-11-16 11:30:24,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:30:24,320 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-16 11:30:24,324 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:30:24,324 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 11:30:24,430 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 11:30:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 139 transitions, 290 flow [2022-11-16 11:30:24,473 INFO L130 PetriNetUnfolder]: 19/163 cut-off events. [2022-11-16 11:30:24,473 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:30:24,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 163 events. 19/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 402 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 123. Up to 6 conditions per place. [2022-11-16 11:30:24,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 139 transitions, 290 flow [2022-11-16 11:30:24,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 139 transitions, 290 flow [2022-11-16 11:30:24,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:30:24,482 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;@55264cdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:30:24,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-11-16 11:30:24,496 INFO L130 PetriNetUnfolder]: 4/69 cut-off events. [2022-11-16 11:30:24,496 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 11:30:24,496 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:24,496 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] [2022-11-16 11:30:24,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 11:30:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:24,498 INFO L85 PathProgramCache]: Analyzing trace with hash -208344856, now seen corresponding path program 1 times [2022-11-16 11:30:24,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:24,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961028396] [2022-11-16 11:30:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:24,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:24,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:24,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961028396] [2022-11-16 11:30:24,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961028396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:24,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:24,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541128712] [2022-11-16 11:30:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:24,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:24,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:24,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:24,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 139 [2022-11-16 11:30:24,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 139 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:24,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:24,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 139 [2022-11-16 11:30:24,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:25,062 INFO L130 PetriNetUnfolder]: 57/495 cut-off events. [2022-11-16 11:30:25,062 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-11-16 11:30:25,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 495 events. 57/495 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2737 event pairs, 13 based on Foata normal form. 82/463 useless extension candidates. Maximal degree in co-relation 139. Up to 46 conditions per place. [2022-11-16 11:30:25,069 INFO L137 encePairwiseOnDemand]: 125/139 looper letters, 27 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2022-11-16 11:30:25,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 343 flow [2022-11-16 11:30:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2022-11-16 11:30:25,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9136690647482014 [2022-11-16 11:30:25,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2022-11-16 11:30:25,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2022-11-16 11:30:25,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:25,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2022-11-16 11:30:25,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,099 INFO L175 Difference]: Start difference. First operand has 127 places, 139 transitions, 290 flow. Second operand 3 states and 381 transitions. [2022-11-16 11:30:25,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 343 flow [2022-11-16 11:30:25,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 341 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:25,108 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 268 flow [2022-11-16 11:30:25,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-11-16 11:30:25,115 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, -5 predicate places. [2022-11-16 11:30:25,116 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 268 flow [2022-11-16 11:30:25,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:25,117 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:25,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:30:25,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-16 11:30:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1014468048, now seen corresponding path program 1 times [2022-11-16 11:30:25,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:25,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930511992] [2022-11-16 11:30:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:25,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:30:25,140 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:30:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:30:25,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:30:25,157 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:30:25,157 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-11-16 11:30:25,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 25 remaining) [2022-11-16 11:30:25,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 25 remaining) [2022-11-16 11:30:25,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 25 remaining) [2022-11-16 11:30:25,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 25 remaining) [2022-11-16 11:30:25,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 25 remaining) [2022-11-16 11:30:25,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 25 remaining) [2022-11-16 11:30:25,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 25 remaining) [2022-11-16 11:30:25,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 25 remaining) [2022-11-16 11:30:25,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 25 remaining) [2022-11-16 11:30:25,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 25 remaining) [2022-11-16 11:30:25,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 25 remaining) [2022-11-16 11:30:25,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 25 remaining) [2022-11-16 11:30:25,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 25 remaining) [2022-11-16 11:30:25,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 25 remaining) [2022-11-16 11:30:25,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 25 remaining) [2022-11-16 11:30:25,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 25 remaining) [2022-11-16 11:30:25,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 25 remaining) [2022-11-16 11:30:25,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 25 remaining) [2022-11-16 11:30:25,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 25 remaining) [2022-11-16 11:30:25,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 25 remaining) [2022-11-16 11:30:25,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 25 remaining) [2022-11-16 11:30:25,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 25 remaining) [2022-11-16 11:30:25,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 25 remaining) [2022-11-16 11:30:25,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 25 remaining) [2022-11-16 11:30:25,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:30:25,165 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-16 11:30:25,165 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:30:25,166 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 11:30:25,217 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 11:30:25,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 195 transitions, 411 flow [2022-11-16 11:30:25,261 INFO L130 PetriNetUnfolder]: 28/232 cut-off events. [2022-11-16 11:30:25,261 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 11:30:25,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 232 events. 28/232 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 742 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2022-11-16 11:30:25,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 195 transitions, 411 flow [2022-11-16 11:30:25,269 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 195 transitions, 411 flow [2022-11-16 11:30:25,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:30:25,271 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;@55264cdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:30:25,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-11-16 11:30:25,280 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2022-11-16 11:30:25,280 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:30:25,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:25,281 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] [2022-11-16 11:30:25,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2022-11-16 11:30:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1869928756, now seen corresponding path program 1 times [2022-11-16 11:30:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:25,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11704357] [2022-11-16 11:30:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:25,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:25,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11704357] [2022-11-16 11:30:25,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11704357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:25,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:25,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668302768] [2022-11-16 11:30:25,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:25,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:25,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:25,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 195 [2022-11-16 11:30:25,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 195 transitions, 411 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:25,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 195 [2022-11-16 11:30:25,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:25,632 INFO L130 PetriNetUnfolder]: 107/875 cut-off events. [2022-11-16 11:30:25,632 INFO L131 PetriNetUnfolder]: For 232/232 co-relation queries the response was YES. [2022-11-16 11:30:25,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 875 events. 107/875 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5930 event pairs, 26 based on Foata normal form. 148/807 useless extension candidates. Maximal degree in co-relation 641. Up to 75 conditions per place. [2022-11-16 11:30:25,651 INFO L137 encePairwiseOnDemand]: 177/195 looper letters, 29 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2022-11-16 11:30:25,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 186 transitions, 467 flow [2022-11-16 11:30:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-11-16 11:30:25,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9247863247863248 [2022-11-16 11:30:25,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-11-16 11:30:25,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-11-16 11:30:25,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:25,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-11-16 11:30:25,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,665 INFO L175 Difference]: Start difference. First operand has 177 places, 195 transitions, 411 flow. Second operand 3 states and 541 transitions. [2022-11-16 11:30:25,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 186 transitions, 467 flow [2022-11-16 11:30:25,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 186 transitions, 459 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:25,678 INFO L231 Difference]: Finished difference. Result has 171 places, 174 transitions, 375 flow [2022-11-16 11:30:25,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=375, PETRI_PLACES=171, PETRI_TRANSITIONS=174} [2022-11-16 11:30:25,680 INFO L288 CegarLoopForPetriNet]: 177 programPoint places, -6 predicate places. [2022-11-16 11:30:25,680 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 174 transitions, 375 flow [2022-11-16 11:30:25,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:25,681 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] [2022-11-16 11:30:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:30:25,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2022-11-16 11:30:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash -498853735, now seen corresponding path program 1 times [2022-11-16 11:30:25,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:25,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704520394] [2022-11-16 11:30:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:25,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:25,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704520394] [2022-11-16 11:30:25,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704520394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:25,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:25,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:30:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11100402] [2022-11-16 11:30:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:25,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:30:25,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:30:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:30:25,805 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 195 [2022-11-16 11:30:25,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 174 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:25,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:25,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 195 [2022-11-16 11:30:25,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:26,030 INFO L130 PetriNetUnfolder]: 107/664 cut-off events. [2022-11-16 11:30:26,030 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2022-11-16 11:30:26,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 664 events. 107/664 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4295 event pairs, 36 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 596. Up to 100 conditions per place. [2022-11-16 11:30:26,047 INFO L137 encePairwiseOnDemand]: 189/195 looper letters, 39 selfloop transitions, 4 changer transitions 0/193 dead transitions. [2022-11-16 11:30:26,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 193 transitions, 529 flow [2022-11-16 11:30:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:30:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:30:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 820 transitions. [2022-11-16 11:30:26,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.841025641025641 [2022-11-16 11:30:26,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 820 transitions. [2022-11-16 11:30:26,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 820 transitions. [2022-11-16 11:30:26,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:26,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 820 transitions. [2022-11-16 11:30:26,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,057 INFO L175 Difference]: Start difference. First operand has 171 places, 174 transitions, 375 flow. Second operand 5 states and 820 transitions. [2022-11-16 11:30:26,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 193 transitions, 529 flow [2022-11-16 11:30:26,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 193 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:30:26,065 INFO L231 Difference]: Finished difference. Result has 177 places, 176 transitions, 399 flow [2022-11-16 11:30:26,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=177, PETRI_TRANSITIONS=176} [2022-11-16 11:30:26,068 INFO L288 CegarLoopForPetriNet]: 177 programPoint places, 0 predicate places. [2022-11-16 11:30:26,069 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 176 transitions, 399 flow [2022-11-16 11:30:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:26,070 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] [2022-11-16 11:30:26,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:30:26,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2022-11-16 11:30:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1084476203, now seen corresponding path program 1 times [2022-11-16 11:30:26,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:26,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407465199] [2022-11-16 11:30:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:26,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:26,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:26,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407465199] [2022-11-16 11:30:26,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407465199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:26,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:26,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505693970] [2022-11-16 11:30:26,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:26,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:26,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 195 [2022-11-16 11:30:26,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 176 transitions, 399 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:26,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 195 [2022-11-16 11:30:26,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:26,405 INFO L130 PetriNetUnfolder]: 64/587 cut-off events. [2022-11-16 11:30:26,406 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2022-11-16 11:30:26,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 587 events. 64/587 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3332 event pairs, 13 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 731. Up to 47 conditions per place. [2022-11-16 11:30:26,425 INFO L137 encePairwiseOnDemand]: 191/195 looper letters, 28 selfloop transitions, 2 changer transitions 0/188 dead transitions. [2022-11-16 11:30:26,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 488 flow [2022-11-16 11:30:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2022-11-16 11:30:26,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8752136752136752 [2022-11-16 11:30:26,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2022-11-16 11:30:26,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2022-11-16 11:30:26,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:26,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2022-11-16 11:30:26,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,432 INFO L175 Difference]: Start difference. First operand has 177 places, 176 transitions, 399 flow. Second operand 3 states and 512 transitions. [2022-11-16 11:30:26,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 488 flow [2022-11-16 11:30:26,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 188 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:30:26,436 INFO L231 Difference]: Finished difference. Result has 178 places, 177 transitions, 409 flow [2022-11-16 11:30:26,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=409, PETRI_PLACES=178, PETRI_TRANSITIONS=177} [2022-11-16 11:30:26,437 INFO L288 CegarLoopForPetriNet]: 177 programPoint places, 1 predicate places. [2022-11-16 11:30:26,437 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 177 transitions, 409 flow [2022-11-16 11:30:26,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:26,438 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] [2022-11-16 11:30:26,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:30:26,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2022-11-16 11:30:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1638874304, now seen corresponding path program 1 times [2022-11-16 11:30:26,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:26,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783336205] [2022-11-16 11:30:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:26,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:26,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:26,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783336205] [2022-11-16 11:30:26,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783336205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:26,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:26,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:30:26,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384628832] [2022-11-16 11:30:26,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:26,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:26,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 195 [2022-11-16 11:30:26,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 177 transitions, 409 flow. Second operand has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:26,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 195 [2022-11-16 11:30:26,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:26,845 INFO L130 PetriNetUnfolder]: 177/801 cut-off events. [2022-11-16 11:30:26,845 INFO L131 PetriNetUnfolder]: For 429/429 co-relation queries the response was YES. [2022-11-16 11:30:26,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 801 events. 177/801 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6188 event pairs, 44 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 1447. Up to 131 conditions per place. [2022-11-16 11:30:26,877 INFO L137 encePairwiseOnDemand]: 186/195 looper letters, 74 selfloop transitions, 10 changer transitions 0/230 dead transitions. [2022-11-16 11:30:26,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 230 transitions, 756 flow [2022-11-16 11:30:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:30:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1277 transitions. [2022-11-16 11:30:26,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8185897435897436 [2022-11-16 11:30:26,881 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1277 transitions. [2022-11-16 11:30:26,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1277 transitions. [2022-11-16 11:30:26,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:26,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1277 transitions. [2022-11-16 11:30:26,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 159.625) internal successors, (1277), 8 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,890 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,890 INFO L175 Difference]: Start difference. First operand has 178 places, 177 transitions, 409 flow. Second operand 8 states and 1277 transitions. [2022-11-16 11:30:26,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 230 transitions, 756 flow [2022-11-16 11:30:26,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 230 transitions, 754 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:30:26,897 INFO L231 Difference]: Finished difference. Result has 188 places, 184 transitions, 470 flow [2022-11-16 11:30:26,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=470, PETRI_PLACES=188, PETRI_TRANSITIONS=184} [2022-11-16 11:30:26,900 INFO L288 CegarLoopForPetriNet]: 177 programPoint places, 11 predicate places. [2022-11-16 11:30:26,904 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 184 transitions, 470 flow [2022-11-16 11:30:26,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:26,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:26,905 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:26,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:30:26,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2022-11-16 11:30:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:26,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1518656956, now seen corresponding path program 1 times [2022-11-16 11:30:26,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:26,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779896390] [2022-11-16 11:30:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:26,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:30:26,944 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:30:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:30:26,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:30:26,966 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:30:26,966 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-11-16 11:30:26,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 33 remaining) [2022-11-16 11:30:26,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 33 remaining) [2022-11-16 11:30:26,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 33 remaining) [2022-11-16 11:30:26,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 33 remaining) [2022-11-16 11:30:26,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 33 remaining) [2022-11-16 11:30:26,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 33 remaining) [2022-11-16 11:30:26,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 33 remaining) [2022-11-16 11:30:26,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 33 remaining) [2022-11-16 11:30:26,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 33 remaining) [2022-11-16 11:30:26,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 33 remaining) [2022-11-16 11:30:26,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 33 remaining) [2022-11-16 11:30:26,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 33 remaining) [2022-11-16 11:30:26,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 33 remaining) [2022-11-16 11:30:26,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 33 remaining) [2022-11-16 11:30:26,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 33 remaining) [2022-11-16 11:30:26,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 33 remaining) [2022-11-16 11:30:26,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 33 remaining) [2022-11-16 11:30:26,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 33 remaining) [2022-11-16 11:30:26,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 33 remaining) [2022-11-16 11:30:26,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 33 remaining) [2022-11-16 11:30:26,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 33 remaining) [2022-11-16 11:30:26,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 33 remaining) [2022-11-16 11:30:26,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 33 remaining) [2022-11-16 11:30:26,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 33 remaining) [2022-11-16 11:30:26,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 33 remaining) [2022-11-16 11:30:26,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 33 remaining) [2022-11-16 11:30:26,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 33 remaining) [2022-11-16 11:30:26,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 33 remaining) [2022-11-16 11:30:26,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 33 remaining) [2022-11-16 11:30:26,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 33 remaining) [2022-11-16 11:30:26,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 33 remaining) [2022-11-16 11:30:26,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 33 remaining) [2022-11-16 11:30:26,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:30:26,974 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:30:26,975 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:30:26,975 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 11:30:27,046 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 11:30:27,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 251 transitions, 534 flow [2022-11-16 11:30:27,105 INFO L130 PetriNetUnfolder]: 37/301 cut-off events. [2022-11-16 11:30:27,105 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 11:30:27,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 301 events. 37/301 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1058 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 240. Up to 10 conditions per place. [2022-11-16 11:30:27,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 251 transitions, 534 flow [2022-11-16 11:30:27,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 251 transitions, 534 flow [2022-11-16 11:30:27,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:30:27,117 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;@55264cdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:30:27,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-16 11:30:27,123 INFO L130 PetriNetUnfolder]: 4/69 cut-off events. [2022-11-16 11:30:27,123 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 11:30:27,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:27,124 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] [2022-11-16 11:30:27,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:27,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1160345681, now seen corresponding path program 1 times [2022-11-16 11:30:27,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:27,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133911530] [2022-11-16 11:30:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:27,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:27,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:27,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133911530] [2022-11-16 11:30:27,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133911530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:27,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:27,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:27,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749757357] [2022-11-16 11:30:27,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:27,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:27,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:27,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 251 [2022-11-16 11:30:27,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 251 transitions, 534 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:27,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:27,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 251 [2022-11-16 11:30:27,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:27,525 INFO L130 PetriNetUnfolder]: 157/1255 cut-off events. [2022-11-16 11:30:27,525 INFO L131 PetriNetUnfolder]: For 487/487 co-relation queries the response was YES. [2022-11-16 11:30:27,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 1255 events. 157/1255 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 9458 event pairs, 39 based on Foata normal form. 288/1225 useless extension candidates. Maximal degree in co-relation 1167. Up to 104 conditions per place. [2022-11-16 11:30:27,565 INFO L137 encePairwiseOnDemand]: 229/251 looper letters, 31 selfloop transitions, 2 changer transitions 0/238 dead transitions. [2022-11-16 11:30:27,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 238 transitions, 595 flow [2022-11-16 11:30:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2022-11-16 11:30:27,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9309428950863213 [2022-11-16 11:30:27,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2022-11-16 11:30:27,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2022-11-16 11:30:27,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:27,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2022-11-16 11:30:27,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:27,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:27,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:27,573 INFO L175 Difference]: Start difference. First operand has 227 places, 251 transitions, 534 flow. Second operand 3 states and 701 transitions. [2022-11-16 11:30:27,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 238 transitions, 595 flow [2022-11-16 11:30:27,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 238 transitions, 577 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:27,579 INFO L231 Difference]: Finished difference. Result has 220 places, 225 transitions, 482 flow [2022-11-16 11:30:27,579 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=220, PETRI_TRANSITIONS=225} [2022-11-16 11:30:27,582 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, -7 predicate places. [2022-11-16 11:30:27,582 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 225 transitions, 482 flow [2022-11-16 11:30:27,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:27,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:27,583 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] [2022-11-16 11:30:27,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:30:27,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1510675376, now seen corresponding path program 1 times [2022-11-16 11:30:27,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294520026] [2022-11-16 11:30:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:27,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:27,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294520026] [2022-11-16 11:30:27,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294520026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:27,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:27,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:30:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613458198] [2022-11-16 11:30:27,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:27,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:30:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:30:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:30:27,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-11-16 11:30:27,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 225 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:27,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:27,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-11-16 11:30:27,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:28,015 INFO L130 PetriNetUnfolder]: 157/940 cut-off events. [2022-11-16 11:30:28,015 INFO L131 PetriNetUnfolder]: For 301/301 co-relation queries the response was YES. [2022-11-16 11:30:28,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1498 conditions, 940 events. 157/940 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6710 event pairs, 54 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 1040. Up to 139 conditions per place. [2022-11-16 11:30:28,045 INFO L137 encePairwiseOnDemand]: 245/251 looper letters, 43 selfloop transitions, 4 changer transitions 0/247 dead transitions. [2022-11-16 11:30:28,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 247 transitions, 665 flow [2022-11-16 11:30:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:30:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:30:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1074 transitions. [2022-11-16 11:30:28,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8557768924302789 [2022-11-16 11:30:28,048 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1074 transitions. [2022-11-16 11:30:28,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1074 transitions. [2022-11-16 11:30:28,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:28,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1074 transitions. [2022-11-16 11:30:28,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 214.8) internal successors, (1074), 5 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,054 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,054 INFO L175 Difference]: Start difference. First operand has 220 places, 225 transitions, 482 flow. Second operand 5 states and 1074 transitions. [2022-11-16 11:30:28,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 247 transitions, 665 flow [2022-11-16 11:30:28,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 247 transitions, 663 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:30:28,061 INFO L231 Difference]: Finished difference. Result has 226 places, 227 transitions, 506 flow [2022-11-16 11:30:28,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=506, PETRI_PLACES=226, PETRI_TRANSITIONS=227} [2022-11-16 11:30:28,063 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, -1 predicate places. [2022-11-16 11:30:28,063 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 227 transitions, 506 flow [2022-11-16 11:30:28,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:28,064 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] [2022-11-16 11:30:28,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:30:28,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:28,065 INFO L85 PathProgramCache]: Analyzing trace with hash 429922252, now seen corresponding path program 1 times [2022-11-16 11:30:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:28,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372613187] [2022-11-16 11:30:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:28,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372613187] [2022-11-16 11:30:28,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372613187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:28,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:28,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124892433] [2022-11-16 11:30:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:28,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 251 [2022-11-16 11:30:28,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 227 transitions, 506 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:28,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 251 [2022-11-16 11:30:28,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:28,427 INFO L130 PetriNetUnfolder]: 114/967 cut-off events. [2022-11-16 11:30:28,428 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2022-11-16 11:30:28,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 967 events. 114/967 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6560 event pairs, 26 based on Foata normal form. 0/733 useless extension candidates. Maximal degree in co-relation 1233. Up to 76 conditions per place. [2022-11-16 11:30:28,470 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 30 selfloop transitions, 2 changer transitions 0/240 dead transitions. [2022-11-16 11:30:28,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 240 transitions, 606 flow [2022-11-16 11:30:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-11-16 11:30:28,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8818061088977424 [2022-11-16 11:30:28,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-11-16 11:30:28,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-11-16 11:30:28,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:28,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-11-16 11:30:28,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,478 INFO L175 Difference]: Start difference. First operand has 226 places, 227 transitions, 506 flow. Second operand 3 states and 664 transitions. [2022-11-16 11:30:28,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 240 transitions, 606 flow [2022-11-16 11:30:28,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 240 transitions, 602 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:30:28,483 INFO L231 Difference]: Finished difference. Result has 227 places, 228 transitions, 516 flow [2022-11-16 11:30:28,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=516, PETRI_PLACES=227, PETRI_TRANSITIONS=228} [2022-11-16 11:30:28,485 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 0 predicate places. [2022-11-16 11:30:28,486 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 228 transitions, 516 flow [2022-11-16 11:30:28,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:28,486 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] [2022-11-16 11:30:28,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:30:28,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash 61076567, now seen corresponding path program 1 times [2022-11-16 11:30:28,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:28,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907491362] [2022-11-16 11:30:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:28,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:28,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907491362] [2022-11-16 11:30:28,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907491362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:28,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:28,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:30:28,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171790275] [2022-11-16 11:30:28,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:28,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:28,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:28,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:28,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 251 [2022-11-16 11:30:28,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 228 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 201.4) internal successors, (1007), 5 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:28,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 251 [2022-11-16 11:30:28,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:29,049 INFO L130 PetriNetUnfolder]: 258/1092 cut-off events. [2022-11-16 11:30:29,049 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2022-11-16 11:30:29,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2265 conditions, 1092 events. 258/1092 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9213 event pairs, 66 based on Foata normal form. 0/881 useless extension candidates. Maximal degree in co-relation 2089. Up to 196 conditions per place. [2022-11-16 11:30:29,140 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 81 selfloop transitions, 10 changer transitions 0/287 dead transitions. [2022-11-16 11:30:29,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 287 transitions, 919 flow [2022-11-16 11:30:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:30:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1684 transitions. [2022-11-16 11:30:29,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8386454183266933 [2022-11-16 11:30:29,145 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1684 transitions. [2022-11-16 11:30:29,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1684 transitions. [2022-11-16 11:30:29,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:29,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1684 transitions. [2022-11-16 11:30:29,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 210.5) internal successors, (1684), 8 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 251.0) internal successors, (2259), 9 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,156 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 251.0) internal successors, (2259), 9 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,156 INFO L175 Difference]: Start difference. First operand has 227 places, 228 transitions, 516 flow. Second operand 8 states and 1684 transitions. [2022-11-16 11:30:29,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 287 transitions, 919 flow [2022-11-16 11:30:29,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 287 transitions, 917 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:30:29,164 INFO L231 Difference]: Finished difference. Result has 237 places, 235 transitions, 577 flow [2022-11-16 11:30:29,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=577, PETRI_PLACES=237, PETRI_TRANSITIONS=235} [2022-11-16 11:30:29,165 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 10 predicate places. [2022-11-16 11:30:29,165 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 235 transitions, 577 flow [2022-11-16 11:30:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.4) internal successors, (1007), 5 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:29,166 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] [2022-11-16 11:30:29,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:30:29,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:29,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:29,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1893374556, now seen corresponding path program 1 times [2022-11-16 11:30:29,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:29,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158142906] [2022-11-16 11:30:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:29,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:29,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:29,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158142906] [2022-11-16 11:30:29,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158142906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:29,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:29,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:30:29,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845069860] [2022-11-16 11:30:29,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:29,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:29,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:29,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:29,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:29,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 251 [2022-11-16 11:30:29,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 235 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:29,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 251 [2022-11-16 11:30:29,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:29,712 INFO L130 PetriNetUnfolder]: 276/1146 cut-off events. [2022-11-16 11:30:29,712 INFO L131 PetriNetUnfolder]: For 794/794 co-relation queries the response was YES. [2022-11-16 11:30:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 1146 events. 276/1146 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9696 event pairs, 63 based on Foata normal form. 8/955 useless extension candidates. Maximal degree in co-relation 2355. Up to 214 conditions per place. [2022-11-16 11:30:29,763 INFO L137 encePairwiseOnDemand]: 243/251 looper letters, 65 selfloop transitions, 11 changer transitions 0/272 dead transitions. [2022-11-16 11:30:29,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 272 transitions, 874 flow [2022-11-16 11:30:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:30:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:30:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1266 transitions. [2022-11-16 11:30:29,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8406374501992032 [2022-11-16 11:30:29,781 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1266 transitions. [2022-11-16 11:30:29,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1266 transitions. [2022-11-16 11:30:29,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:29,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1266 transitions. [2022-11-16 11:30:29,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,788 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,788 INFO L175 Difference]: Start difference. First operand has 237 places, 235 transitions, 577 flow. Second operand 6 states and 1266 transitions. [2022-11-16 11:30:29,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 272 transitions, 874 flow [2022-11-16 11:30:29,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 272 transitions, 874 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:29,794 INFO L231 Difference]: Finished difference. Result has 246 places, 237 transitions, 635 flow [2022-11-16 11:30:29,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=635, PETRI_PLACES=246, PETRI_TRANSITIONS=237} [2022-11-16 11:30:29,796 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 19 predicate places. [2022-11-16 11:30:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 237 transitions, 635 flow [2022-11-16 11:30:29,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:29,796 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] [2022-11-16 11:30:29,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:30:29,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1893406302, now seen corresponding path program 1 times [2022-11-16 11:30:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770929144] [2022-11-16 11:30:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:29,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:29,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:29,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770929144] [2022-11-16 11:30:29,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770929144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:29,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:29,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:30:29,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223059358] [2022-11-16 11:30:29,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:29,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:30:29,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:29,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:30:29,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:30:29,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 251 [2022-11-16 11:30:29,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 237 transitions, 635 flow. Second operand has 7 states, 7 states have (on average 196.14285714285714) internal successors, (1373), 7 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:29,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:29,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 251 [2022-11-16 11:30:29,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:30,593 INFO L130 PetriNetUnfolder]: 441/1519 cut-off events. [2022-11-16 11:30:30,698 INFO L131 PetriNetUnfolder]: For 1595/1595 co-relation queries the response was YES. [2022-11-16 11:30:30,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1519 events. 441/1519 cut-off events. For 1595/1595 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13616 event pairs, 102 based on Foata normal form. 0/1282 useless extension candidates. Maximal degree in co-relation 3804. Up to 367 conditions per place. [2022-11-16 11:30:30,771 INFO L137 encePairwiseOnDemand]: 239/251 looper letters, 121 selfloop transitions, 18 changer transitions 0/333 dead transitions. [2022-11-16 11:30:30,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 333 transitions, 1295 flow [2022-11-16 11:30:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:30:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:30:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2271 transitions. [2022-11-16 11:30:30,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8225280695400218 [2022-11-16 11:30:30,776 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2271 transitions. [2022-11-16 11:30:30,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2271 transitions. [2022-11-16 11:30:30,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:30,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2271 transitions. [2022-11-16 11:30:30,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 206.45454545454547) internal successors, (2271), 11 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:30,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 251.0) internal successors, (3012), 12 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:30,788 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 251.0) internal successors, (3012), 12 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:30,789 INFO L175 Difference]: Start difference. First operand has 246 places, 237 transitions, 635 flow. Second operand 11 states and 2271 transitions. [2022-11-16 11:30:30,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 333 transitions, 1295 flow [2022-11-16 11:30:30,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 333 transitions, 1285 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:30,797 INFO L231 Difference]: Finished difference. Result has 263 places, 250 transitions, 758 flow [2022-11-16 11:30:30,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=758, PETRI_PLACES=263, PETRI_TRANSITIONS=250} [2022-11-16 11:30:30,798 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 36 predicate places. [2022-11-16 11:30:30,798 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 250 transitions, 758 flow [2022-11-16 11:30:30,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.14285714285714) internal successors, (1373), 7 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:30,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:30,799 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] [2022-11-16 11:30:30,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:30:30,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1433945798, now seen corresponding path program 1 times [2022-11-16 11:30:30,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:30,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091424420] [2022-11-16 11:30:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:30,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:30,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091424420] [2022-11-16 11:30:30,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091424420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:30,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:30,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:30:30,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111922322] [2022-11-16 11:30:30,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:30,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:30:30,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:30:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:30:30,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 251 [2022-11-16 11:30:30,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 250 transitions, 758 flow. Second operand has 7 states, 7 states have (on average 196.28571428571428) internal successors, (1374), 7 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:30,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:30,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 251 [2022-11-16 11:30:30,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:31,866 INFO L130 PetriNetUnfolder]: 527/1773 cut-off events. [2022-11-16 11:30:31,866 INFO L131 PetriNetUnfolder]: For 2245/2245 co-relation queries the response was YES. [2022-11-16 11:30:31,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 1773 events. 527/1773 cut-off events. For 2245/2245 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16108 event pairs, 102 based on Foata normal form. 24/1576 useless extension candidates. Maximal degree in co-relation 4814. Up to 445 conditions per place. [2022-11-16 11:30:31,979 INFO L137 encePairwiseOnDemand]: 239/251 looper letters, 109 selfloop transitions, 21 changer transitions 0/324 dead transitions. [2022-11-16 11:30:31,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 324 transitions, 1340 flow [2022-11-16 11:30:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:30:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:30:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1870 transitions. [2022-11-16 11:30:31,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8277999114652501 [2022-11-16 11:30:31,985 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1870 transitions. [2022-11-16 11:30:31,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1870 transitions. [2022-11-16 11:30:31,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:31,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1870 transitions. [2022-11-16 11:30:31,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.77777777777777) internal successors, (1870), 9 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:31,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:31,996 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:31,996 INFO L175 Difference]: Start difference. First operand has 263 places, 250 transitions, 758 flow. Second operand 9 states and 1870 transitions. [2022-11-16 11:30:31,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 324 transitions, 1340 flow [2022-11-16 11:30:32,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 324 transitions, 1338 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:32,008 INFO L231 Difference]: Finished difference. Result has 275 places, 255 transitions, 878 flow [2022-11-16 11:30:32,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=878, PETRI_PLACES=275, PETRI_TRANSITIONS=255} [2022-11-16 11:30:32,009 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 48 predicate places. [2022-11-16 11:30:32,009 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 255 transitions, 878 flow [2022-11-16 11:30:32,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.28571428571428) internal successors, (1374), 7 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:32,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:32,011 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] [2022-11-16 11:30:32,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:30:32,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash 73255041, now seen corresponding path program 1 times [2022-11-16 11:30:32,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:32,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933459107] [2022-11-16 11:30:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:32,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:32,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933459107] [2022-11-16 11:30:32,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933459107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901118475] [2022-11-16 11:30:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:32,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:32,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:32,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:30:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:30:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:32,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:32,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901118475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:32,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:30:32,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-16 11:30:32,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253202680] [2022-11-16 11:30:32,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:32,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:30:32,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:32,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:30:32,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:30:32,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-11-16 11:30:32,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 255 transitions, 878 flow. Second operand has 10 states, 10 states have (on average 208.5) internal successors, (2085), 10 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:32,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:32,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-11-16 11:30:32,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:33,410 INFO L130 PetriNetUnfolder]: 576/2618 cut-off events. [2022-11-16 11:30:33,411 INFO L131 PetriNetUnfolder]: For 2863/2863 co-relation queries the response was YES. [2022-11-16 11:30:33,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6146 conditions, 2618 events. 576/2618 cut-off events. For 2863/2863 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 23049 event pairs, 70 based on Foata normal form. 40/2219 useless extension candidates. Maximal degree in co-relation 5708. Up to 433 conditions per place. [2022-11-16 11:30:33,527 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 78 selfloop transitions, 16 changer transitions 0/314 dead transitions. [2022-11-16 11:30:33,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 314 transitions, 1354 flow [2022-11-16 11:30:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:30:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:30:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2552 transitions. [2022-11-16 11:30:33,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8472775564409031 [2022-11-16 11:30:33,533 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2552 transitions. [2022-11-16 11:30:33,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2552 transitions. [2022-11-16 11:30:33,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:33,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2552 transitions. [2022-11-16 11:30:33,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 212.66666666666666) internal successors, (2552), 12 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:33,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:33,546 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:33,546 INFO L175 Difference]: Start difference. First operand has 275 places, 255 transitions, 878 flow. Second operand 12 states and 2552 transitions. [2022-11-16 11:30:33,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 314 transitions, 1354 flow [2022-11-16 11:30:33,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 314 transitions, 1344 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:33,665 INFO L231 Difference]: Finished difference. Result has 291 places, 261 transitions, 950 flow [2022-11-16 11:30:33,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=950, PETRI_PLACES=291, PETRI_TRANSITIONS=261} [2022-11-16 11:30:33,666 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 64 predicate places. [2022-11-16 11:30:33,666 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 261 transitions, 950 flow [2022-11-16 11:30:33,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 208.5) internal successors, (2085), 10 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:33,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:33,667 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-16 11:30:33,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:33,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:33,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:33,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2024060071, now seen corresponding path program 1 times [2022-11-16 11:30:33,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:33,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770400545] [2022-11-16 11:30:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:33,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:33,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:33,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770400545] [2022-11-16 11:30:33,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770400545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950143497] [2022-11-16 11:30:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:33,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:33,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:33,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:33,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:30:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:30:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:34,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:30:34,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950143497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:34,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:30:34,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 11:30:34,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557636911] [2022-11-16 11:30:34,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:34,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:30:34,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:30:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:30:34,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-11-16 11:30:34,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 261 transitions, 950 flow. Second operand has 4 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:34,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:34,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-11-16 11:30:34,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:34,842 INFO L130 PetriNetUnfolder]: 492/1912 cut-off events. [2022-11-16 11:30:34,842 INFO L131 PetriNetUnfolder]: For 3223/3223 co-relation queries the response was YES. [2022-11-16 11:30:34,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1912 events. 492/1912 cut-off events. For 3223/3223 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 17305 event pairs, 7 based on Foata normal form. 52/1705 useless extension candidates. Maximal degree in co-relation 5207. Up to 634 conditions per place. [2022-11-16 11:30:34,940 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 36 selfloop transitions, 7 changer transitions 0/263 dead transitions. [2022-11-16 11:30:34,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 263 transitions, 1050 flow [2022-11-16 11:30:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:30:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:30:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 850 transitions. [2022-11-16 11:30:34,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8466135458167331 [2022-11-16 11:30:34,943 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 850 transitions. [2022-11-16 11:30:34,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 850 transitions. [2022-11-16 11:30:34,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:34,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 850 transitions. [2022-11-16 11:30:34,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:34,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:34,956 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:34,956 INFO L175 Difference]: Start difference. First operand has 291 places, 261 transitions, 950 flow. Second operand 4 states and 850 transitions. [2022-11-16 11:30:34,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 263 transitions, 1050 flow [2022-11-16 11:30:34,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 263 transitions, 1028 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-16 11:30:34,972 INFO L231 Difference]: Finished difference. Result has 286 places, 257 transitions, 914 flow [2022-11-16 11:30:34,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=914, PETRI_PLACES=286, PETRI_TRANSITIONS=257} [2022-11-16 11:30:34,973 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 59 predicate places. [2022-11-16 11:30:34,973 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 257 transitions, 914 flow [2022-11-16 11:30:34,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:34,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:34,974 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] [2022-11-16 11:30:34,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:35,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:30:35,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:35,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1084690390, now seen corresponding path program 1 times [2022-11-16 11:30:35,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:35,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374575619] [2022-11-16 11:30:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:35,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:35,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:35,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374575619] [2022-11-16 11:30:35,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374575619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:35,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:35,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:30:35,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112594645] [2022-11-16 11:30:35,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:35,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:30:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:30:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:30:35,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-11-16 11:30:35,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 257 transitions, 914 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:35,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:35,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-11-16 11:30:35,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:35,886 INFO L130 PetriNetUnfolder]: 125/949 cut-off events. [2022-11-16 11:30:35,886 INFO L131 PetriNetUnfolder]: For 604/604 co-relation queries the response was YES. [2022-11-16 11:30:35,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1701 conditions, 949 events. 125/949 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6872 event pairs, 37 based on Foata normal form. 0/758 useless extension candidates. Maximal degree in co-relation 1630. Up to 101 conditions per place. [2022-11-16 11:30:35,951 INFO L137 encePairwiseOnDemand]: 245/251 looper letters, 40 selfloop transitions, 4 changer transitions 0/276 dead transitions. [2022-11-16 11:30:35,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 276 transitions, 1070 flow [2022-11-16 11:30:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:30:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:30:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1071 transitions. [2022-11-16 11:30:35,955 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.853386454183267 [2022-11-16 11:30:35,955 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1071 transitions. [2022-11-16 11:30:35,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1071 transitions. [2022-11-16 11:30:35,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:35,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1071 transitions. [2022-11-16 11:30:35,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 214.2) internal successors, (1071), 5 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:35,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:35,961 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:35,961 INFO L175 Difference]: Start difference. First operand has 286 places, 257 transitions, 914 flow. Second operand 5 states and 1071 transitions. [2022-11-16 11:30:35,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 276 transitions, 1070 flow [2022-11-16 11:30:35,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 276 transitions, 1056 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:30:35,977 INFO L231 Difference]: Finished difference. Result has 290 places, 259 transitions, 926 flow [2022-11-16 11:30:35,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=926, PETRI_PLACES=290, PETRI_TRANSITIONS=259} [2022-11-16 11:30:35,978 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 63 predicate places. [2022-11-16 11:30:35,979 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 259 transitions, 926 flow [2022-11-16 11:30:35,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:35,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:35,980 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:35,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:30:35,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1399475360, now seen corresponding path program 1 times [2022-11-16 11:30:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082894740] [2022-11-16 11:30:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:35,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 11:30:36,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082894740] [2022-11-16 11:30:36,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082894740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:36,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:36,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:36,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897524016] [2022-11-16 11:30:36,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:36,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:36,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:36,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 251 [2022-11-16 11:30:36,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 259 transitions, 926 flow. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:36,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 251 [2022-11-16 11:30:36,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:36,615 INFO L130 PetriNetUnfolder]: 82/872 cut-off events. [2022-11-16 11:30:36,615 INFO L131 PetriNetUnfolder]: For 449/449 co-relation queries the response was YES. [2022-11-16 11:30:36,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 872 events. 82/872 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5724 event pairs, 14 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 1329. Up to 48 conditions per place. [2022-11-16 11:30:36,655 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 29 selfloop transitions, 2 changer transitions 0/271 dead transitions. [2022-11-16 11:30:36,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 271 transitions, 1017 flow [2022-11-16 11:30:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2022-11-16 11:30:36,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8804780876494024 [2022-11-16 11:30:36,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2022-11-16 11:30:36,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2022-11-16 11:30:36,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:36,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2022-11-16 11:30:36,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,660 INFO L175 Difference]: Start difference. First operand has 290 places, 259 transitions, 926 flow. Second operand 3 states and 663 transitions. [2022-11-16 11:30:36,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 271 transitions, 1017 flow [2022-11-16 11:30:36,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 271 transitions, 1013 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:30:36,666 INFO L231 Difference]: Finished difference. Result has 291 places, 260 transitions, 936 flow [2022-11-16 11:30:36,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=936, PETRI_PLACES=291, PETRI_TRANSITIONS=260} [2022-11-16 11:30:36,666 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 64 predicate places. [2022-11-16 11:30:36,667 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 260 transitions, 936 flow [2022-11-16 11:30:36,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:36,667 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] [2022-11-16 11:30:36,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 11:30:36,668 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1290576177, now seen corresponding path program 1 times [2022-11-16 11:30:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:36,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932870649] [2022-11-16 11:30:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:36,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:36,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:36,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932870649] [2022-11-16 11:30:36,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932870649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:36,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:36,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:30:36,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806333495] [2022-11-16 11:30:36,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:36,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:36,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 251 [2022-11-16 11:30:36,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 260 transitions, 936 flow. Second operand has 5 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:36,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 251 [2022-11-16 11:30:36,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:37,434 INFO L130 PetriNetUnfolder]: 195/1086 cut-off events. [2022-11-16 11:30:37,434 INFO L131 PetriNetUnfolder]: For 795/795 co-relation queries the response was YES. [2022-11-16 11:30:37,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 1086 events. 195/1086 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8902 event pairs, 45 based on Foata normal form. 0/894 useless extension candidates. Maximal degree in co-relation 2177. Up to 132 conditions per place. [2022-11-16 11:30:37,525 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 75 selfloop transitions, 10 changer transitions 0/313 dead transitions. [2022-11-16 11:30:37,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 313 transitions, 1285 flow [2022-11-16 11:30:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:30:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1678 transitions. [2022-11-16 11:30:37,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8356573705179283 [2022-11-16 11:30:37,530 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1678 transitions. [2022-11-16 11:30:37,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1678 transitions. [2022-11-16 11:30:37,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:37,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1678 transitions. [2022-11-16 11:30:37,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 209.75) internal successors, (1678), 8 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:37,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 251.0) internal successors, (2259), 9 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:37,539 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 251.0) internal successors, (2259), 9 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:37,539 INFO L175 Difference]: Start difference. First operand has 291 places, 260 transitions, 936 flow. Second operand 8 states and 1678 transitions. [2022-11-16 11:30:37,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 313 transitions, 1285 flow [2022-11-16 11:30:37,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 313 transitions, 1283 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:30:37,550 INFO L231 Difference]: Finished difference. Result has 301 places, 267 transitions, 997 flow [2022-11-16 11:30:37,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=997, PETRI_PLACES=301, PETRI_TRANSITIONS=267} [2022-11-16 11:30:37,551 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 74 predicate places. [2022-11-16 11:30:37,551 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 267 transitions, 997 flow [2022-11-16 11:30:37,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:37,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:37,552 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:37,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:30:37,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-16 11:30:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1605713635, now seen corresponding path program 1 times [2022-11-16 11:30:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:37,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599290871] [2022-11-16 11:30:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:30:37,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:30:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:30:37,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:30:37,594 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:30:37,595 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2022-11-16 11:30:37,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (39 of 41 remaining) [2022-11-16 11:30:37,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (38 of 41 remaining) [2022-11-16 11:30:37,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (37 of 41 remaining) [2022-11-16 11:30:37,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (36 of 41 remaining) [2022-11-16 11:30:37,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (35 of 41 remaining) [2022-11-16 11:30:37,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (34 of 41 remaining) [2022-11-16 11:30:37,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 41 remaining) [2022-11-16 11:30:37,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 41 remaining) [2022-11-16 11:30:37,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 41 remaining) [2022-11-16 11:30:37,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 41 remaining) [2022-11-16 11:30:37,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 41 remaining) [2022-11-16 11:30:37,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 41 remaining) [2022-11-16 11:30:37,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 41 remaining) [2022-11-16 11:30:37,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 41 remaining) [2022-11-16 11:30:37,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 41 remaining) [2022-11-16 11:30:37,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 41 remaining) [2022-11-16 11:30:37,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 41 remaining) [2022-11-16 11:30:37,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 41 remaining) [2022-11-16 11:30:37,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 41 remaining) [2022-11-16 11:30:37,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 41 remaining) [2022-11-16 11:30:37,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 41 remaining) [2022-11-16 11:30:37,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 41 remaining) [2022-11-16 11:30:37,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 41 remaining) [2022-11-16 11:30:37,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 41 remaining) [2022-11-16 11:30:37,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 41 remaining) [2022-11-16 11:30:37,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 41 remaining) [2022-11-16 11:30:37,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 41 remaining) [2022-11-16 11:30:37,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 41 remaining) [2022-11-16 11:30:37,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 41 remaining) [2022-11-16 11:30:37,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 41 remaining) [2022-11-16 11:30:37,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 41 remaining) [2022-11-16 11:30:37,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 41 remaining) [2022-11-16 11:30:37,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 41 remaining) [2022-11-16 11:30:37,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 41 remaining) [2022-11-16 11:30:37,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 41 remaining) [2022-11-16 11:30:37,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 41 remaining) [2022-11-16 11:30:37,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 41 remaining) [2022-11-16 11:30:37,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 41 remaining) [2022-11-16 11:30:37,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 41 remaining) [2022-11-16 11:30:37,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 41 remaining) [2022-11-16 11:30:37,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 11:30:37,602 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:37,603 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:30:37,603 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 11:30:37,659 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 11:30:37,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 307 transitions, 659 flow [2022-11-16 11:30:37,751 INFO L130 PetriNetUnfolder]: 46/370 cut-off events. [2022-11-16 11:30:37,751 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 11:30:37,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 370 events. 46/370 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1397 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 314. Up to 12 conditions per place. [2022-11-16 11:30:37,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 307 transitions, 659 flow [2022-11-16 11:30:37,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 307 transitions, 659 flow [2022-11-16 11:30:37,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:30:37,761 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;@55264cdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:30:37,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2022-11-16 11:30:37,769 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2022-11-16 11:30:37,769 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:30:37,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:37,770 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] [2022-11-16 11:30:37,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:37,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:37,771 INFO L85 PathProgramCache]: Analyzing trace with hash -76144780, now seen corresponding path program 1 times [2022-11-16 11:30:37,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:37,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707584427] [2022-11-16 11:30:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:37,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:37,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:37,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707584427] [2022-11-16 11:30:37,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707584427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:37,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:37,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:37,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569531435] [2022-11-16 11:30:37,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:37,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:37,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:37,806 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 307 [2022-11-16 11:30:37,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 307 transitions, 659 flow. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:37,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:37,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 307 [2022-11-16 11:30:37,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:38,250 INFO L130 PetriNetUnfolder]: 207/1635 cut-off events. [2022-11-16 11:30:38,251 INFO L131 PetriNetUnfolder]: For 867/867 co-relation queries the response was YES. [2022-11-16 11:30:38,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2328 conditions, 1635 events. 207/1635 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 13159 event pairs, 52 based on Foata normal form. 524/1739 useless extension candidates. Maximal degree in co-relation 1717. Up to 133 conditions per place. [2022-11-16 11:30:38,292 INFO L137 encePairwiseOnDemand]: 281/307 looper letters, 33 selfloop transitions, 2 changer transitions 0/290 dead transitions. [2022-11-16 11:30:38,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 290 transitions, 727 flow [2022-11-16 11:30:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 861 transitions. [2022-11-16 11:30:38,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9348534201954397 [2022-11-16 11:30:38,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 861 transitions. [2022-11-16 11:30:38,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 861 transitions. [2022-11-16 11:30:38,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:38,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 861 transitions. [2022-11-16 11:30:38,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,301 INFO L175 Difference]: Start difference. First operand has 277 places, 307 transitions, 659 flow. Second operand 3 states and 861 transitions. [2022-11-16 11:30:38,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 290 transitions, 727 flow [2022-11-16 11:30:38,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 290 transitions, 695 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:38,307 INFO L231 Difference]: Finished difference. Result has 269 places, 276 transitions, 589 flow [2022-11-16 11:30:38,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=589, PETRI_PLACES=269, PETRI_TRANSITIONS=276} [2022-11-16 11:30:38,308 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, -8 predicate places. [2022-11-16 11:30:38,308 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 276 transitions, 589 flow [2022-11-16 11:30:38,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:38,309 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] [2022-11-16 11:30:38,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:30:38,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:38,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1357770489, now seen corresponding path program 1 times [2022-11-16 11:30:38,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:38,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028650433] [2022-11-16 11:30:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:38,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:38,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028650433] [2022-11-16 11:30:38,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028650433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:38,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:38,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:30:38,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045886401] [2022-11-16 11:30:38,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:38,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:30:38,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:38,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:30:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:30:38,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 307 [2022-11-16 11:30:38,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 276 transitions, 589 flow. Second operand has 4 states, 4 states have (on average 257.25) internal successors, (1029), 4 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:38,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 307 [2022-11-16 11:30:38,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:38,744 INFO L130 PetriNetUnfolder]: 207/1216 cut-off events. [2022-11-16 11:30:38,744 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2022-11-16 11:30:38,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 1216 events. 207/1216 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 9180 event pairs, 72 based on Foata normal form. 0/917 useless extension candidates. Maximal degree in co-relation 1484. Up to 178 conditions per place. [2022-11-16 11:30:38,772 INFO L137 encePairwiseOnDemand]: 301/307 looper letters, 47 selfloop transitions, 4 changer transitions 0/301 dead transitions. [2022-11-16 11:30:38,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 301 transitions, 801 flow [2022-11-16 11:30:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:30:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:30:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1328 transitions. [2022-11-16 11:30:38,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8651465798045602 [2022-11-16 11:30:38,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1328 transitions. [2022-11-16 11:30:38,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1328 transitions. [2022-11-16 11:30:38,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:38,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1328 transitions. [2022-11-16 11:30:38,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.6) internal successors, (1328), 5 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,782 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,782 INFO L175 Difference]: Start difference. First operand has 269 places, 276 transitions, 589 flow. Second operand 5 states and 1328 transitions. [2022-11-16 11:30:38,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 301 transitions, 801 flow [2022-11-16 11:30:38,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 301 transitions, 799 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:30:38,788 INFO L231 Difference]: Finished difference. Result has 275 places, 278 transitions, 613 flow [2022-11-16 11:30:38,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=613, PETRI_PLACES=275, PETRI_TRANSITIONS=278} [2022-11-16 11:30:38,789 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, -2 predicate places. [2022-11-16 11:30:38,789 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 278 transitions, 613 flow [2022-11-16 11:30:38,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.25) internal successors, (1029), 4 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:38,790 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] [2022-11-16 11:30:38,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 11:30:38,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:38,791 INFO L85 PathProgramCache]: Analyzing trace with hash 207102951, now seen corresponding path program 1 times [2022-11-16 11:30:38,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:38,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263297246] [2022-11-16 11:30:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:38,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:38,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:38,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263297246] [2022-11-16 11:30:38,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263297246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:38,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:38,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:38,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342770487] [2022-11-16 11:30:38,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:38,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:38,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:38,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:38,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 307 [2022-11-16 11:30:38,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 278 transitions, 613 flow. Second operand has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:38,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:38,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 307 [2022-11-16 11:30:38,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:39,179 INFO L130 PetriNetUnfolder]: 164/1347 cut-off events. [2022-11-16 11:30:39,179 INFO L131 PetriNetUnfolder]: For 227/227 co-relation queries the response was YES. [2022-11-16 11:30:39,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 1347 events. 164/1347 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10084 event pairs, 39 based on Foata normal form. 0/1011 useless extension candidates. Maximal degree in co-relation 1735. Up to 105 conditions per place. [2022-11-16 11:30:39,221 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 32 selfloop transitions, 2 changer transitions 0/292 dead transitions. [2022-11-16 11:30:39,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 292 transitions, 724 flow [2022-11-16 11:30:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 816 transitions. [2022-11-16 11:30:39,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8859934853420195 [2022-11-16 11:30:39,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 816 transitions. [2022-11-16 11:30:39,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 816 transitions. [2022-11-16 11:30:39,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:39,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 816 transitions. [2022-11-16 11:30:39,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,228 INFO L175 Difference]: Start difference. First operand has 275 places, 278 transitions, 613 flow. Second operand 3 states and 816 transitions. [2022-11-16 11:30:39,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 292 transitions, 724 flow [2022-11-16 11:30:39,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 292 transitions, 720 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:30:39,234 INFO L231 Difference]: Finished difference. Result has 276 places, 279 transitions, 623 flow [2022-11-16 11:30:39,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=623, PETRI_PLACES=276, PETRI_TRANSITIONS=279} [2022-11-16 11:30:39,235 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, -1 predicate places. [2022-11-16 11:30:39,235 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 279 transitions, 623 flow [2022-11-16 11:30:39,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:39,236 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] [2022-11-16 11:30:39,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 11:30:39,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash 853612398, now seen corresponding path program 1 times [2022-11-16 11:30:39,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:39,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79410531] [2022-11-16 11:30:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:39,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79410531] [2022-11-16 11:30:39,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79410531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:39,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:39,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:30:39,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202861977] [2022-11-16 11:30:39,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:39,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:39,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:39,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 307 [2022-11-16 11:30:39,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 279 transitions, 623 flow. Second operand has 5 states, 5 states have (on average 251.4) internal successors, (1257), 5 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:39,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 307 [2022-11-16 11:30:39,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:39,755 INFO L130 PetriNetUnfolder]: 339/1383 cut-off events. [2022-11-16 11:30:39,755 INFO L131 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2022-11-16 11:30:39,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2908 conditions, 1383 events. 339/1383 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 11938 event pairs, 88 based on Foata normal form. 0/1115 useless extension candidates. Maximal degree in co-relation 2731. Up to 261 conditions per place. [2022-11-16 11:30:39,852 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 88 selfloop transitions, 10 changer transitions 0/344 dead transitions. [2022-11-16 11:30:39,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 344 transitions, 1082 flow [2022-11-16 11:30:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:30:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2091 transitions. [2022-11-16 11:30:39,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8513843648208469 [2022-11-16 11:30:39,858 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2091 transitions. [2022-11-16 11:30:39,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2091 transitions. [2022-11-16 11:30:39,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:39,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2091 transitions. [2022-11-16 11:30:39,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 261.375) internal successors, (2091), 8 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,866 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,866 INFO L175 Difference]: Start difference. First operand has 276 places, 279 transitions, 623 flow. Second operand 8 states and 2091 transitions. [2022-11-16 11:30:39,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 344 transitions, 1082 flow [2022-11-16 11:30:39,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 344 transitions, 1080 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:30:39,873 INFO L231 Difference]: Finished difference. Result has 286 places, 286 transitions, 684 flow [2022-11-16 11:30:39,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=684, PETRI_PLACES=286, PETRI_TRANSITIONS=286} [2022-11-16 11:30:39,874 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 9 predicate places. [2022-11-16 11:30:39,874 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 286 transitions, 684 flow [2022-11-16 11:30:39,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 251.4) internal successors, (1257), 5 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:39,875 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] [2022-11-16 11:30:39,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-16 11:30:39,875 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash 692181793, now seen corresponding path program 1 times [2022-11-16 11:30:39,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:39,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258768844] [2022-11-16 11:30:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:39,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:39,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:39,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258768844] [2022-11-16 11:30:39,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258768844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:39,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:39,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:30:39,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953101480] [2022-11-16 11:30:39,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:39,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:39,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:39,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:39,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 307 [2022-11-16 11:30:39,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 286 transitions, 684 flow. Second operand has 5 states, 5 states have (on average 251.6) internal successors, (1258), 5 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:39,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:39,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 307 [2022-11-16 11:30:39,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:40,507 INFO L130 PetriNetUnfolder]: 363/1452 cut-off events. [2022-11-16 11:30:40,507 INFO L131 PetriNetUnfolder]: For 1046/1046 co-relation queries the response was YES. [2022-11-16 11:30:40,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3250 conditions, 1452 events. 363/1452 cut-off events. For 1046/1046 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12721 event pairs, 84 based on Foata normal form. 10/1209 useless extension candidates. Maximal degree in co-relation 3071. Up to 285 conditions per place. [2022-11-16 11:30:40,593 INFO L137 encePairwiseOnDemand]: 299/307 looper letters, 70 selfloop transitions, 11 changer transitions 0/327 dead transitions. [2022-11-16 11:30:40,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 327 transitions, 1019 flow [2022-11-16 11:30:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:30:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:30:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1571 transitions. [2022-11-16 11:30:40,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8528773072747015 [2022-11-16 11:30:40,596 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1571 transitions. [2022-11-16 11:30:40,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1571 transitions. [2022-11-16 11:30:40,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:40,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1571 transitions. [2022-11-16 11:30:40,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 261.8333333333333) internal successors, (1571), 6 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:40,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 307.0) internal successors, (2149), 7 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:40,603 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 307.0) internal successors, (2149), 7 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:40,603 INFO L175 Difference]: Start difference. First operand has 286 places, 286 transitions, 684 flow. Second operand 6 states and 1571 transitions. [2022-11-16 11:30:40,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 327 transitions, 1019 flow [2022-11-16 11:30:40,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 327 transitions, 1019 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:40,610 INFO L231 Difference]: Finished difference. Result has 295 places, 288 transitions, 742 flow [2022-11-16 11:30:40,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=742, PETRI_PLACES=295, PETRI_TRANSITIONS=288} [2022-11-16 11:30:40,611 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 18 predicate places. [2022-11-16 11:30:40,611 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 288 transitions, 742 flow [2022-11-16 11:30:40,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 251.6) internal successors, (1258), 5 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:40,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:40,612 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] [2022-11-16 11:30:40,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 11:30:40,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:40,613 INFO L85 PathProgramCache]: Analyzing trace with hash 692213539, now seen corresponding path program 1 times [2022-11-16 11:30:40,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:40,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171987869] [2022-11-16 11:30:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:40,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:40,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:40,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171987869] [2022-11-16 11:30:40,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171987869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:40,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:40,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:30:40,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168978352] [2022-11-16 11:30:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:40,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:30:40,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:30:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:30:40,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 307 [2022-11-16 11:30:40,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 288 transitions, 742 flow. Second operand has 7 states, 7 states have (on average 246.14285714285714) internal successors, (1723), 7 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:40,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:40,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 307 [2022-11-16 11:30:40,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:41,510 INFO L130 PetriNetUnfolder]: 582/1931 cut-off events. [2022-11-16 11:30:41,510 INFO L131 PetriNetUnfolder]: For 2086/2086 co-relation queries the response was YES. [2022-11-16 11:30:41,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5129 conditions, 1931 events. 582/1931 cut-off events. For 2086/2086 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17848 event pairs, 136 based on Foata normal form. 0/1630 useless extension candidates. Maximal degree in co-relation 4946. Up to 489 conditions per place. [2022-11-16 11:30:41,663 INFO L137 encePairwiseOnDemand]: 295/307 looper letters, 131 selfloop transitions, 18 changer transitions 0/393 dead transitions. [2022-11-16 11:30:41,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 393 transitions, 1485 flow [2022-11-16 11:30:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:30:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:30:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2831 transitions. [2022-11-16 11:30:41,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8383180337577731 [2022-11-16 11:30:41,669 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2831 transitions. [2022-11-16 11:30:41,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2831 transitions. [2022-11-16 11:30:41,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:41,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2831 transitions. [2022-11-16 11:30:41,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 257.3636363636364) internal successors, (2831), 11 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:41,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 307.0) internal successors, (3684), 12 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:41,683 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 307.0) internal successors, (3684), 12 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:41,683 INFO L175 Difference]: Start difference. First operand has 295 places, 288 transitions, 742 flow. Second operand 11 states and 2831 transitions. [2022-11-16 11:30:41,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 393 transitions, 1485 flow [2022-11-16 11:30:41,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 393 transitions, 1475 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:41,695 INFO L231 Difference]: Finished difference. Result has 312 places, 301 transitions, 865 flow [2022-11-16 11:30:41,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=865, PETRI_PLACES=312, PETRI_TRANSITIONS=301} [2022-11-16 11:30:41,696 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 35 predicate places. [2022-11-16 11:30:41,696 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 301 transitions, 865 flow [2022-11-16 11:30:41,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.14285714285714) internal successors, (1723), 7 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:41,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:41,697 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] [2022-11-16 11:30:41,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 11:30:41,698 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -16215535, now seen corresponding path program 1 times [2022-11-16 11:30:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:41,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363367474] [2022-11-16 11:30:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:41,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:41,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363367474] [2022-11-16 11:30:41,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363367474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:41,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:41,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:30:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63527197] [2022-11-16 11:30:41,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:41,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:30:41,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:30:41,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:30:41,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 307 [2022-11-16 11:30:41,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 301 transitions, 865 flow. Second operand has 7 states, 7 states have (on average 246.28571428571428) internal successors, (1724), 7 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:41,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:41,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 307 [2022-11-16 11:30:41,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:42,975 INFO L130 PetriNetUnfolder]: 696/2255 cut-off events. [2022-11-16 11:30:42,976 INFO L131 PetriNetUnfolder]: For 2918/2918 co-relation queries the response was YES. [2022-11-16 11:30:43,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6432 conditions, 2255 events. 696/2255 cut-off events. For 2918/2918 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 21304 event pairs, 136 based on Foata normal form. 30/2004 useless extension candidates. Maximal degree in co-relation 6241. Up to 593 conditions per place. [2022-11-16 11:30:43,088 INFO L137 encePairwiseOnDemand]: 295/307 looper letters, 117 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2022-11-16 11:30:43,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 382 transitions, 1512 flow [2022-11-16 11:30:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:30:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:30:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2328 transitions. [2022-11-16 11:30:43,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8425624321389794 [2022-11-16 11:30:43,093 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2328 transitions. [2022-11-16 11:30:43,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2328 transitions. [2022-11-16 11:30:43,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:43,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2328 transitions. [2022-11-16 11:30:43,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 258.6666666666667) internal successors, (2328), 9 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:43,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 307.0) internal successors, (3070), 10 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:43,104 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 307.0) internal successors, (3070), 10 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:43,105 INFO L175 Difference]: Start difference. First operand has 312 places, 301 transitions, 865 flow. Second operand 9 states and 2328 transitions. [2022-11-16 11:30:43,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 382 transitions, 1512 flow [2022-11-16 11:30:43,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 382 transitions, 1510 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:43,119 INFO L231 Difference]: Finished difference. Result has 324 places, 306 transitions, 985 flow [2022-11-16 11:30:43,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=985, PETRI_PLACES=324, PETRI_TRANSITIONS=306} [2022-11-16 11:30:43,120 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 47 predicate places. [2022-11-16 11:30:43,120 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 306 transitions, 985 flow [2022-11-16 11:30:43,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.28571428571428) internal successors, (1724), 7 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:43,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:43,122 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] [2022-11-16 11:30:43,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 11:30:43,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:43,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1073220486, now seen corresponding path program 1 times [2022-11-16 11:30:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:43,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705297818] [2022-11-16 11:30:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:43,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:43,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705297818] [2022-11-16 11:30:43,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705297818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:43,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675612632] [2022-11-16 11:30:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:43,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:43,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:43,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:43,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:30:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:30:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:43,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:43,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675612632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:43,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:30:43,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-16 11:30:43,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521025420] [2022-11-16 11:30:43,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:43,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:30:43,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:43,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:30:43,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:30:43,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 307 [2022-11-16 11:30:43,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 306 transitions, 985 flow. Second operand has 10 states, 10 states have (on average 258.5) internal successors, (2585), 10 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:43,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:43,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 307 [2022-11-16 11:30:43,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:44,965 INFO L130 PetriNetUnfolder]: 761/3328 cut-off events. [2022-11-16 11:30:44,966 INFO L131 PetriNetUnfolder]: For 3701/3701 co-relation queries the response was YES. [2022-11-16 11:30:45,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 3328 events. 761/3328 cut-off events. For 3701/3701 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 30725 event pairs, 93 based on Foata normal form. 50/2813 useless extension candidates. Maximal degree in co-relation 7442. Up to 581 conditions per place. [2022-11-16 11:30:45,070 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 89 selfloop transitions, 16 changer transitions 0/375 dead transitions. [2022-11-16 11:30:45,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 375 transitions, 1553 flow [2022-11-16 11:30:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:30:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:30:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3163 transitions. [2022-11-16 11:30:45,073 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8585776330076005 [2022-11-16 11:30:45,073 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3163 transitions. [2022-11-16 11:30:45,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3163 transitions. [2022-11-16 11:30:45,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:45,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3163 transitions. [2022-11-16 11:30:45,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 263.5833333333333) internal successors, (3163), 12 states have internal predecessors, (3163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:45,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:45,085 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:45,085 INFO L175 Difference]: Start difference. First operand has 324 places, 306 transitions, 985 flow. Second operand 12 states and 3163 transitions. [2022-11-16 11:30:45,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 375 transitions, 1553 flow [2022-11-16 11:30:45,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 375 transitions, 1543 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:45,101 INFO L231 Difference]: Finished difference. Result has 340 places, 312 transitions, 1057 flow [2022-11-16 11:30:45,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1057, PETRI_PLACES=340, PETRI_TRANSITIONS=312} [2022-11-16 11:30:45,102 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 63 predicate places. [2022-11-16 11:30:45,102 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 312 transitions, 1057 flow [2022-11-16 11:30:45,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 258.5) internal successors, (2585), 10 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:45,104 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:45,104 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-16 11:30:45,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:45,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:30:45,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:45,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1089902096, now seen corresponding path program 1 times [2022-11-16 11:30:45,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:45,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624731923] [2022-11-16 11:30:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:45,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:45,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624731923] [2022-11-16 11:30:45,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624731923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:45,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888147962] [2022-11-16 11:30:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:45,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:45,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:45,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:45,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:30:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:45,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:30:45,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:45,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:30:45,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888147962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:45,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:30:45,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 11:30:45,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720383864] [2022-11-16 11:30:45,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:45,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:30:45,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:30:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:30:45,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 307 [2022-11-16 11:30:45,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 312 transitions, 1057 flow. Second operand has 4 states, 4 states have (on average 258.75) internal successors, (1035), 4 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:45,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:45,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 307 [2022-11-16 11:30:45,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:46,499 INFO L130 PetriNetUnfolder]: 652/2428 cut-off events. [2022-11-16 11:30:46,499 INFO L131 PetriNetUnfolder]: For 4141/4141 co-relation queries the response was YES. [2022-11-16 11:30:46,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6930 conditions, 2428 events. 652/2428 cut-off events. For 4141/4141 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 22628 event pairs, 9 based on Foata normal form. 65/2165 useless extension candidates. Maximal degree in co-relation 6729. Up to 818 conditions per place. [2022-11-16 11:30:46,622 INFO L137 encePairwiseOnDemand]: 302/307 looper letters, 39 selfloop transitions, 7 changer transitions 0/316 dead transitions. [2022-11-16 11:30:46,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 316 transitions, 1177 flow [2022-11-16 11:30:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:30:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:30:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1053 transitions. [2022-11-16 11:30:46,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8574918566775245 [2022-11-16 11:30:46,624 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1053 transitions. [2022-11-16 11:30:46,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1053 transitions. [2022-11-16 11:30:46,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:46,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1053 transitions. [2022-11-16 11:30:46,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.25) internal successors, (1053), 4 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:46,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:46,628 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:46,628 INFO L175 Difference]: Start difference. First operand has 340 places, 312 transitions, 1057 flow. Second operand 4 states and 1053 transitions. [2022-11-16 11:30:46,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 316 transitions, 1177 flow [2022-11-16 11:30:46,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 316 transitions, 1155 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-16 11:30:46,645 INFO L231 Difference]: Finished difference. Result has 335 places, 308 transitions, 1021 flow [2022-11-16 11:30:46,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1021, PETRI_PLACES=335, PETRI_TRANSITIONS=308} [2022-11-16 11:30:46,646 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 58 predicate places. [2022-11-16 11:30:46,646 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 308 transitions, 1021 flow [2022-11-16 11:30:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.75) internal successors, (1035), 4 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:46,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:46,647 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] [2022-11-16 11:30:46,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:46,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:46,853 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1877932541, now seen corresponding path program 1 times [2022-11-16 11:30:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:46,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957783962] [2022-11-16 11:30:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:46,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:46,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:46,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957783962] [2022-11-16 11:30:46,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957783962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:46,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:46,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:30:46,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821772333] [2022-11-16 11:30:46,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:46,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:30:46,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:46,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:30:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:30:46,899 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 307 [2022-11-16 11:30:46,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 308 transitions, 1021 flow. Second operand has 4 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:46,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:46,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 307 [2022-11-16 11:30:46,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:47,550 INFO L130 PetriNetUnfolder]: 175/1225 cut-off events. [2022-11-16 11:30:47,550 INFO L131 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2022-11-16 11:30:47,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 1225 events. 175/1225 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9430 event pairs, 55 based on Foata normal form. 0/961 useless extension candidates. Maximal degree in co-relation 2073. Up to 140 conditions per place. [2022-11-16 11:30:47,642 INFO L137 encePairwiseOnDemand]: 301/307 looper letters, 44 selfloop transitions, 4 changer transitions 0/330 dead transitions. [2022-11-16 11:30:47,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 330 transitions, 1206 flow [2022-11-16 11:30:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:30:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:30:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1325 transitions. [2022-11-16 11:30:47,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8631921824104235 [2022-11-16 11:30:47,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1325 transitions. [2022-11-16 11:30:47,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1325 transitions. [2022-11-16 11:30:47,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:47,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1325 transitions. [2022-11-16 11:30:47,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:47,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:47,648 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:47,648 INFO L175 Difference]: Start difference. First operand has 335 places, 308 transitions, 1021 flow. Second operand 5 states and 1325 transitions. [2022-11-16 11:30:47,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 330 transitions, 1206 flow [2022-11-16 11:30:47,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 330 transitions, 1192 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:30:47,661 INFO L231 Difference]: Finished difference. Result has 339 places, 310 transitions, 1033 flow [2022-11-16 11:30:47,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1033, PETRI_PLACES=339, PETRI_TRANSITIONS=310} [2022-11-16 11:30:47,662 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 62 predicate places. [2022-11-16 11:30:47,663 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 310 transitions, 1033 flow [2022-11-16 11:30:47,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:47,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:47,663 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:47,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 11:30:47,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:47,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1810406198, now seen corresponding path program 1 times [2022-11-16 11:30:47,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:47,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865182852] [2022-11-16 11:30:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 11:30:47,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:47,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865182852] [2022-11-16 11:30:47,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865182852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:47,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:47,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:47,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647591950] [2022-11-16 11:30:47,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:47,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:30:47,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:47,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:30:47,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:30:47,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 307 [2022-11-16 11:30:47,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 310 transitions, 1033 flow. Second operand has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:47,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:47,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 307 [2022-11-16 11:30:47,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:48,344 INFO L130 PetriNetUnfolder]: 132/1252 cut-off events. [2022-11-16 11:30:48,345 INFO L131 PetriNetUnfolder]: For 521/521 co-relation queries the response was YES. [2022-11-16 11:30:48,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 1252 events. 132/1252 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 9151 event pairs, 27 based on Foata normal form. 0/980 useless extension candidates. Maximal degree in co-relation 1831. Up to 77 conditions per place. [2022-11-16 11:30:48,451 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 31 selfloop transitions, 2 changer transitions 0/323 dead transitions. [2022-11-16 11:30:48,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 323 transitions, 1135 flow [2022-11-16 11:30:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:30:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:30:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 815 transitions. [2022-11-16 11:30:48,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8849077090119435 [2022-11-16 11:30:48,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 815 transitions. [2022-11-16 11:30:48,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 815 transitions. [2022-11-16 11:30:48,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:48,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 815 transitions. [2022-11-16 11:30:48,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:48,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:48,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:48,455 INFO L175 Difference]: Start difference. First operand has 339 places, 310 transitions, 1033 flow. Second operand 3 states and 815 transitions. [2022-11-16 11:30:48,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 323 transitions, 1135 flow [2022-11-16 11:30:48,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 323 transitions, 1131 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:30:48,465 INFO L231 Difference]: Finished difference. Result has 340 places, 311 transitions, 1043 flow [2022-11-16 11:30:48,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1043, PETRI_PLACES=340, PETRI_TRANSITIONS=311} [2022-11-16 11:30:48,466 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 63 predicate places. [2022-11-16 11:30:48,466 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 311 transitions, 1043 flow [2022-11-16 11:30:48,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:48,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:48,467 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] [2022-11-16 11:30:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-16 11:30:48,467 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 807900164, now seen corresponding path program 1 times [2022-11-16 11:30:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581500643] [2022-11-16 11:30:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:48,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581500643] [2022-11-16 11:30:48,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581500643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:48,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:48,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:30:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379783484] [2022-11-16 11:30:48,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:48,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:48,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:48,529 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 307 [2022-11-16 11:30:48,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 311 transitions, 1043 flow. Second operand has 5 states, 5 states have (on average 251.6) internal successors, (1258), 5 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:48,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:48,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 307 [2022-11-16 11:30:48,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:49,563 INFO L130 PetriNetUnfolder]: 276/1377 cut-off events. [2022-11-16 11:30:49,563 INFO L131 PetriNetUnfolder]: For 1002/1002 co-relation queries the response was YES. [2022-11-16 11:30:49,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2895 conditions, 1377 events. 276/1377 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11983 event pairs, 67 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 2819. Up to 197 conditions per place. [2022-11-16 11:30:49,703 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 82 selfloop transitions, 10 changer transitions 0/370 dead transitions. [2022-11-16 11:30:49,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 370 transitions, 1448 flow [2022-11-16 11:30:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:30:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2085 transitions. [2022-11-16 11:30:49,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8489413680781759 [2022-11-16 11:30:49,707 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2085 transitions. [2022-11-16 11:30:49,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2085 transitions. [2022-11-16 11:30:49,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:49,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2085 transitions. [2022-11-16 11:30:49,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 260.625) internal successors, (2085), 8 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:49,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:49,712 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:49,712 INFO L175 Difference]: Start difference. First operand has 340 places, 311 transitions, 1043 flow. Second operand 8 states and 2085 transitions. [2022-11-16 11:30:49,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 370 transitions, 1448 flow [2022-11-16 11:30:49,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 370 transitions, 1446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:30:49,723 INFO L231 Difference]: Finished difference. Result has 350 places, 318 transitions, 1104 flow [2022-11-16 11:30:49,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1104, PETRI_PLACES=350, PETRI_TRANSITIONS=318} [2022-11-16 11:30:49,724 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 73 predicate places. [2022-11-16 11:30:49,724 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 318 transitions, 1104 flow [2022-11-16 11:30:49,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 251.6) internal successors, (1258), 5 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:49,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:49,725 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] [2022-11-16 11:30:49,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 11:30:49,725 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash -724865770, now seen corresponding path program 1 times [2022-11-16 11:30:49,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:49,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069375099] [2022-11-16 11:30:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:49,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:49,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:49,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069375099] [2022-11-16 11:30:49,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069375099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:49,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:49,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:30:49,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686794321] [2022-11-16 11:30:49,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:30:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:30:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:30:49,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 307 [2022-11-16 11:30:49,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 318 transitions, 1104 flow. Second operand has 7 states, 7 states have (on average 246.28571428571428) internal successors, (1724), 7 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:49,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:49,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 307 [2022-11-16 11:30:49,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:51,076 INFO L130 PetriNetUnfolder]: 411/1680 cut-off events. [2022-11-16 11:30:51,076 INFO L131 PetriNetUnfolder]: For 1507/1507 co-relation queries the response was YES. [2022-11-16 11:30:51,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 1680 events. 411/1680 cut-off events. For 1507/1507 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15194 event pairs, 79 based on Foata normal form. 0/1421 useless extension candidates. Maximal degree in co-relation 3988. Up to 320 conditions per place. [2022-11-16 11:30:51,325 INFO L137 encePairwiseOnDemand]: 295/307 looper letters, 120 selfloop transitions, 18 changer transitions 0/414 dead transitions. [2022-11-16 11:30:51,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 414 transitions, 1746 flow [2022-11-16 11:30:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:30:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:30:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2822 transitions. [2022-11-16 11:30:51,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8356529464021321 [2022-11-16 11:30:51,330 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2822 transitions. [2022-11-16 11:30:51,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2822 transitions. [2022-11-16 11:30:51,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:51,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2822 transitions. [2022-11-16 11:30:51,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 256.54545454545456) internal successors, (2822), 11 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:51,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 307.0) internal successors, (3684), 12 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:51,339 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 307.0) internal successors, (3684), 12 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:51,339 INFO L175 Difference]: Start difference. First operand has 350 places, 318 transitions, 1104 flow. Second operand 11 states and 2822 transitions. [2022-11-16 11:30:51,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 414 transitions, 1746 flow [2022-11-16 11:30:51,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 414 transitions, 1746 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:51,352 INFO L231 Difference]: Finished difference. Result has 367 places, 331 transitions, 1229 flow [2022-11-16 11:30:51,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1229, PETRI_PLACES=367, PETRI_TRANSITIONS=331} [2022-11-16 11:30:51,353 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 90 predicate places. [2022-11-16 11:30:51,353 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 331 transitions, 1229 flow [2022-11-16 11:30:51,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.28571428571428) internal successors, (1724), 7 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:51,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:51,354 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] [2022-11-16 11:30:51,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-16 11:30:51,354 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash -724897516, now seen corresponding path program 1 times [2022-11-16 11:30:51,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:51,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593364014] [2022-11-16 11:30:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:51,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:30:51,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593364014] [2022-11-16 11:30:51,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593364014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:51,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:51,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:30:51,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360928517] [2022-11-16 11:30:51,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:51,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:51,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 307 [2022-11-16 11:30:51,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 331 transitions, 1229 flow. Second operand has 5 states, 5 states have (on average 251.8) internal successors, (1259), 5 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:51,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:51,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 307 [2022-11-16 11:30:51,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:52,776 INFO L130 PetriNetUnfolder]: 402/1747 cut-off events. [2022-11-16 11:30:52,776 INFO L131 PetriNetUnfolder]: For 1760/1760 co-relation queries the response was YES. [2022-11-16 11:30:52,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 1747 events. 402/1747 cut-off events. For 1760/1760 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16011 event pairs, 103 based on Foata normal form. 12/1530 useless extension candidates. Maximal degree in co-relation 4263. Up to 311 conditions per place. [2022-11-16 11:30:53,069 INFO L137 encePairwiseOnDemand]: 299/307 looper letters, 71 selfloop transitions, 12 changer transitions 0/367 dead transitions. [2022-11-16 11:30:53,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 367 transitions, 1546 flow [2022-11-16 11:30:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:30:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:30:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1567 transitions. [2022-11-16 11:30:53,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8507057546145494 [2022-11-16 11:30:53,071 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1567 transitions. [2022-11-16 11:30:53,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1567 transitions. [2022-11-16 11:30:53,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:53,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1567 transitions. [2022-11-16 11:30:53,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 261.1666666666667) internal successors, (1567), 6 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:53,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 307.0) internal successors, (2149), 7 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:53,077 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 307.0) internal successors, (2149), 7 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:53,077 INFO L175 Difference]: Start difference. First operand has 367 places, 331 transitions, 1229 flow. Second operand 6 states and 1567 transitions. [2022-11-16 11:30:53,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 367 transitions, 1546 flow [2022-11-16 11:30:53,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 367 transitions, 1544 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:53,087 INFO L231 Difference]: Finished difference. Result has 376 places, 333 transitions, 1291 flow [2022-11-16 11:30:53,088 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1291, PETRI_PLACES=376, PETRI_TRANSITIONS=333} [2022-11-16 11:30:53,088 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 99 predicate places. [2022-11-16 11:30:53,088 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 333 transitions, 1291 flow [2022-11-16 11:30:53,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 251.8) internal successors, (1259), 5 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:53,089 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:53,089 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] [2022-11-16 11:30:53,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-16 11:30:53,089 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1566671967, now seen corresponding path program 1 times [2022-11-16 11:30:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:53,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901215386] [2022-11-16 11:30:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:53,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901215386] [2022-11-16 11:30:53,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901215386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421763809] [2022-11-16 11:30:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:53,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:53,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:53,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:53,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:30:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:30:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:53,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:53,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421763809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:53,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:30:53,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 11:30:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317866501] [2022-11-16 11:30:53,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:53,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:30:53,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:30:53,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:30:53,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 307 [2022-11-16 11:30:53,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 333 transitions, 1291 flow. Second operand has 13 states, 13 states have (on average 252.07692307692307) internal successors, (3277), 13 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:53,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:53,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 307 [2022-11-16 11:30:53,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:56,029 INFO L130 PetriNetUnfolder]: 1171/3914 cut-off events. [2022-11-16 11:30:56,029 INFO L131 PetriNetUnfolder]: For 7053/7053 co-relation queries the response was YES. [2022-11-16 11:30:56,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12006 conditions, 3914 events. 1171/3914 cut-off events. For 7053/7053 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 40117 event pairs, 353 based on Foata normal form. 30/3495 useless extension candidates. Maximal degree in co-relation 11784. Up to 977 conditions per place. [2022-11-16 11:30:56,792 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 187 selfloop transitions, 32 changer transitions 0/498 dead transitions. [2022-11-16 11:30:56,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 498 transitions, 2693 flow [2022-11-16 11:30:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:30:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:30:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5432 transitions. [2022-11-16 11:30:56,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8425624321389794 [2022-11-16 11:30:56,797 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5432 transitions. [2022-11-16 11:30:56,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5432 transitions. [2022-11-16 11:30:56,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:56,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5432 transitions. [2022-11-16 11:30:56,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 258.6666666666667) internal successors, (5432), 21 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:56,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 307.0) internal successors, (6754), 22 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:56,814 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 307.0) internal successors, (6754), 22 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:56,814 INFO L175 Difference]: Start difference. First operand has 376 places, 333 transitions, 1291 flow. Second operand 21 states and 5432 transitions. [2022-11-16 11:30:56,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 498 transitions, 2693 flow [2022-11-16 11:30:56,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 498 transitions, 2685 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:56,844 INFO L231 Difference]: Finished difference. Result has 401 places, 352 transitions, 1568 flow [2022-11-16 11:30:56,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1568, PETRI_PLACES=401, PETRI_TRANSITIONS=352} [2022-11-16 11:30:56,845 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 124 predicate places. [2022-11-16 11:30:56,845 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 352 transitions, 1568 flow [2022-11-16 11:30:56,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 252.07692307692307) internal successors, (3277), 13 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:56,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:56,846 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:56,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 11:30:57,051 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:30:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:57,051 INFO L85 PathProgramCache]: Analyzing trace with hash -249757636, now seen corresponding path program 1 times [2022-11-16 11:30:57,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:57,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976065268] [2022-11-16 11:30:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:57,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976065268] [2022-11-16 11:30:57,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976065268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083043611] [2022-11-16 11:30:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:57,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:57,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:57,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:30:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:30:57,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:57,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:57,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083043611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:57,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:30:57,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-16 11:30:57,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80981904] [2022-11-16 11:30:57,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:57,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:30:57,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:30:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:30:57,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 307 [2022-11-16 11:30:57,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 352 transitions, 1568 flow. Second operand has 19 states, 19 states have (on average 246.94736842105263) internal successors, (4692), 19 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:57,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:57,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 307 [2022-11-16 11:30:57,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:01,922 INFO L130 PetriNetUnfolder]: 1843/5481 cut-off events. [2022-11-16 11:31:01,922 INFO L131 PetriNetUnfolder]: For 11994/11994 co-relation queries the response was YES. [2022-11-16 11:31:02,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18494 conditions, 5481 events. 1843/5481 cut-off events. For 11994/11994 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 58159 event pairs, 428 based on Foata normal form. 15/4897 useless extension candidates. Maximal degree in co-relation 18267. Up to 1589 conditions per place. [2022-11-16 11:31:02,758 INFO L137 encePairwiseOnDemand]: 293/307 looper letters, 291 selfloop transitions, 48 changer transitions 0/612 dead transitions. [2022-11-16 11:31:02,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 612 transitions, 3741 flow [2022-11-16 11:31:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:31:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-16 11:31:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7380 transitions. [2022-11-16 11:31:02,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8289340671683703 [2022-11-16 11:31:02,773 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7380 transitions. [2022-11-16 11:31:02,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7380 transitions. [2022-11-16 11:31:02,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:02,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7380 transitions. [2022-11-16 11:31:02,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 254.48275862068965) internal successors, (7380), 29 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:02,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 307.0) internal successors, (9210), 30 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:02,801 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 307.0) internal successors, (9210), 30 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:02,802 INFO L175 Difference]: Start difference. First operand has 401 places, 352 transitions, 1568 flow. Second operand 29 states and 7380 transitions. [2022-11-16 11:31:02,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 612 transitions, 3741 flow [2022-11-16 11:31:02,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 612 transitions, 3603 flow, removed 21 selfloop flow, removed 11 redundant places. [2022-11-16 11:31:02,850 INFO L231 Difference]: Finished difference. Result has 424 places, 375 transitions, 1837 flow [2022-11-16 11:31:02,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1837, PETRI_PLACES=424, PETRI_TRANSITIONS=375} [2022-11-16 11:31:02,850 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 147 predicate places. [2022-11-16 11:31:02,851 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 375 transitions, 1837 flow [2022-11-16 11:31:02,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 246.94736842105263) internal successors, (4692), 19 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:02,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:02,852 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:02,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 11:31:03,054 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:31:03,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash -996001209, now seen corresponding path program 1 times [2022-11-16 11:31:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:03,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791799975] [2022-11-16 11:31:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:03,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:31:03,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791799975] [2022-11-16 11:31:03,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791799975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:03,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:03,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:31:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393130835] [2022-11-16 11:31:03,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:03,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:31:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:31:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:31:03,152 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 307 [2022-11-16 11:31:03,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 375 transitions, 1837 flow. Second operand has 7 states, 7 states have (on average 246.42857142857142) internal successors, (1725), 7 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:03,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:03,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 307 [2022-11-16 11:31:03,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:06,810 INFO L130 PetriNetUnfolder]: 568/2401 cut-off events. [2022-11-16 11:31:06,810 INFO L131 PetriNetUnfolder]: For 3551/3551 co-relation queries the response was YES. [2022-11-16 11:31:07,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6522 conditions, 2401 events. 568/2401 cut-off events. For 3551/3551 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 23294 event pairs, 103 based on Foata normal form. 24/2115 useless extension candidates. Maximal degree in co-relation 6424. Up to 446 conditions per place. [2022-11-16 11:31:07,327 INFO L137 encePairwiseOnDemand]: 295/307 looper letters, 110 selfloop transitions, 21 changer transitions 0/449 dead transitions. [2022-11-16 11:31:07,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 449 transitions, 2421 flow [2022-11-16 11:31:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:31:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:31:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2321 transitions. [2022-11-16 11:31:07,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8400289540354687 [2022-11-16 11:31:07,331 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2321 transitions. [2022-11-16 11:31:07,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2321 transitions. [2022-11-16 11:31:07,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:07,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2321 transitions. [2022-11-16 11:31:07,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 257.8888888888889) internal successors, (2321), 9 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:07,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 307.0) internal successors, (3070), 10 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:07,337 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 307.0) internal successors, (3070), 10 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:07,337 INFO L175 Difference]: Start difference. First operand has 424 places, 375 transitions, 1837 flow. Second operand 9 states and 2321 transitions. [2022-11-16 11:31:07,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 449 transitions, 2421 flow [2022-11-16 11:31:07,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 449 transitions, 2308 flow, removed 19 selfloop flow, removed 14 redundant places. [2022-11-16 11:31:07,367 INFO L231 Difference]: Finished difference. Result has 422 places, 380 transitions, 1846 flow [2022-11-16 11:31:07,368 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1846, PETRI_PLACES=422, PETRI_TRANSITIONS=380} [2022-11-16 11:31:07,368 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 145 predicate places. [2022-11-16 11:31:07,368 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 380 transitions, 1846 flow [2022-11-16 11:31:07,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.42857142857142) internal successors, (1725), 7 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:07,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:07,369 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:07,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-16 11:31:07,370 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:31:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1322157744, now seen corresponding path program 1 times [2022-11-16 11:31:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:07,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441343424] [2022-11-16 11:31:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:07,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:07,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441343424] [2022-11-16 11:31:07,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441343424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:07,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845781342] [2022-11-16 11:31:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:07,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:07,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:07,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:07,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:31:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:31:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:07,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:07,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845781342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:07,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:31:07,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-16 11:31:07,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568776363] [2022-11-16 11:31:07,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:31:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:31:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:31:07,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 307 [2022-11-16 11:31:07,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 380 transitions, 1846 flow. Second operand has 19 states, 19 states have (on average 242.10526315789474) internal successors, (4600), 19 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:07,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:07,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 307 [2022-11-16 11:31:07,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:15,004 INFO L130 PetriNetUnfolder]: 2459/6841 cut-off events. [2022-11-16 11:31:15,004 INFO L131 PetriNetUnfolder]: For 13857/13857 co-relation queries the response was YES. [2022-11-16 11:31:15,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23622 conditions, 6841 events. 2459/6841 cut-off events. For 13857/13857 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 74742 event pairs, 516 based on Foata normal form. 15/6133 useless extension candidates. Maximal degree in co-relation 23393. Up to 2161 conditions per place. [2022-11-16 11:31:15,778 INFO L137 encePairwiseOnDemand]: 290/307 looper letters, 433 selfloop transitions, 86 changer transitions 0/785 dead transitions. [2022-11-16 11:31:15,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 785 transitions, 5151 flow [2022-11-16 11:31:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:31:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-16 11:31:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 12433 transitions. [2022-11-16 11:31:15,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8099674267100977 [2022-11-16 11:31:15,792 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 12433 transitions. [2022-11-16 11:31:15,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 12433 transitions. [2022-11-16 11:31:15,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:15,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 12433 transitions. [2022-11-16 11:31:15,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 248.66) internal successors, (12433), 50 states have internal predecessors, (12433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:15,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 307.0) internal successors, (15657), 51 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:15,828 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 307.0) internal successors, (15657), 51 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:15,828 INFO L175 Difference]: Start difference. First operand has 422 places, 380 transitions, 1846 flow. Second operand 50 states and 12433 transitions. [2022-11-16 11:31:15,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 785 transitions, 5151 flow [2022-11-16 11:31:15,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 785 transitions, 5141 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-16 11:31:15,892 INFO L231 Difference]: Finished difference. Result has 482 places, 420 transitions, 2420 flow [2022-11-16 11:31:15,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=2420, PETRI_PLACES=482, PETRI_TRANSITIONS=420} [2022-11-16 11:31:15,894 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 205 predicate places. [2022-11-16 11:31:15,894 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 420 transitions, 2420 flow [2022-11-16 11:31:15,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 242.10526315789474) internal successors, (4600), 19 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:15,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:15,895 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:15,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:16,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:16,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:31:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:16,106 INFO L85 PathProgramCache]: Analyzing trace with hash 764635609, now seen corresponding path program 1 times [2022-11-16 11:31:16,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:16,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30998954] [2022-11-16 11:31:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:16,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:31:16,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:16,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30998954] [2022-11-16 11:31:16,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30998954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:16,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712999306] [2022-11-16 11:31:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:16,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:16,172 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:16,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:31:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:16,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:31:16,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:31:16,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:31:16,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712999306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:16,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:31:16,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-16 11:31:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177451997] [2022-11-16 11:31:16,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:16,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:31:16,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:31:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:31:16,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 307 [2022-11-16 11:31:16,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 420 transitions, 2420 flow. Second operand has 10 states, 10 states have (on average 258.6) internal successors, (2586), 10 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:16,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:16,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 307 [2022-11-16 11:31:16,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:23,088 INFO L130 PetriNetUnfolder]: 625/3386 cut-off events. [2022-11-16 11:31:23,088 INFO L131 PetriNetUnfolder]: For 4696/4696 co-relation queries the response was YES. [2022-11-16 11:31:23,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8083 conditions, 3386 events. 625/3386 cut-off events. For 4696/4696 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 32001 event pairs, 71 based on Foata normal form. 40/2876 useless extension candidates. Maximal degree in co-relation 7972. Up to 434 conditions per place. [2022-11-16 11:31:23,811 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 79 selfloop transitions, 16 changer transitions 0/479 dead transitions. [2022-11-16 11:31:23,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 479 transitions, 2898 flow [2022-11-16 11:31:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:31:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:31:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3153 transitions. [2022-11-16 11:31:23,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8558631921824105 [2022-11-16 11:31:23,815 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3153 transitions. [2022-11-16 11:31:23,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3153 transitions. [2022-11-16 11:31:23,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:23,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3153 transitions. [2022-11-16 11:31:23,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 262.75) internal successors, (3153), 12 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:23,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:23,823 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:23,824 INFO L175 Difference]: Start difference. First operand has 482 places, 420 transitions, 2420 flow. Second operand 12 states and 3153 transitions. [2022-11-16 11:31:23,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 479 transitions, 2898 flow [2022-11-16 11:31:23,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 479 transitions, 2752 flow, removed 28 selfloop flow, removed 17 redundant places. [2022-11-16 11:31:23,871 INFO L231 Difference]: Finished difference. Result has 481 places, 426 transitions, 2356 flow [2022-11-16 11:31:23,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2356, PETRI_PLACES=481, PETRI_TRANSITIONS=426} [2022-11-16 11:31:23,873 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 204 predicate places. [2022-11-16 11:31:23,873 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 426 transitions, 2356 flow [2022-11-16 11:31:23,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 258.6) internal successors, (2586), 10 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:23,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:23,874 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:23,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:24,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:31:24,084 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:31:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash -294464740, now seen corresponding path program 1 times [2022-11-16 11:31:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633806254] [2022-11-16 11:31:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:24,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:24,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633806254] [2022-11-16 11:31:24,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633806254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:24,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796023191] [2022-11-16 11:31:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:24,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:24,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:24,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:24,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:31:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:31:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:24,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:24,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796023191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:24,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:31:24,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-16 11:31:24,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804058542] [2022-11-16 11:31:24,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:24,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:31:24,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:31:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:31:24,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 307 [2022-11-16 11:31:24,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 426 transitions, 2356 flow. Second operand has 14 states, 14 states have (on average 247.64285714285714) internal successors, (3467), 14 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:24,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:24,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 307 [2022-11-16 11:31:24,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:34,896 INFO L130 PetriNetUnfolder]: 3452/9355 cut-off events. [2022-11-16 11:31:34,896 INFO L131 PetriNetUnfolder]: For 20046/20046 co-relation queries the response was YES. [2022-11-16 11:31:35,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33587 conditions, 9355 events. 3452/9355 cut-off events. For 20046/20046 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 105772 event pairs, 602 based on Foata normal form. 15/8437 useless extension candidates. Maximal degree in co-relation 33341. Up to 3061 conditions per place. [2022-11-16 11:31:36,986 INFO L137 encePairwiseOnDemand]: 295/307 looper letters, 356 selfloop transitions, 85 changer transitions 0/749 dead transitions. [2022-11-16 11:31:36,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 749 transitions, 5059 flow [2022-11-16 11:31:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:31:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-16 11:31:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 10131 transitions. [2022-11-16 11:31:36,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.825 [2022-11-16 11:31:36,995 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 10131 transitions. [2022-11-16 11:31:36,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 10131 transitions. [2022-11-16 11:31:36,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:36,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 10131 transitions. [2022-11-16 11:31:37,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 253.275) internal successors, (10131), 40 states have internal predecessors, (10131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:37,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 307.0) internal successors, (12587), 41 states have internal predecessors, (12587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:37,020 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 307.0) internal successors, (12587), 41 states have internal predecessors, (12587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:37,021 INFO L175 Difference]: Start difference. First operand has 481 places, 426 transitions, 2356 flow. Second operand 40 states and 10131 transitions. [2022-11-16 11:31:37,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 749 transitions, 5059 flow [2022-11-16 11:31:37,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 749 transitions, 5033 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-16 11:31:37,128 INFO L231 Difference]: Finished difference. Result has 527 places, 460 transitions, 2783 flow [2022-11-16 11:31:37,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2783, PETRI_PLACES=527, PETRI_TRANSITIONS=460} [2022-11-16 11:31:37,130 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 250 predicate places. [2022-11-16 11:31:37,130 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 460 transitions, 2783 flow [2022-11-16 11:31:37,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 247.64285714285714) internal successors, (3467), 14 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:37,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:37,131 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:37,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:37,335 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 46 more)] === [2022-11-16 11:31:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:37,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2066098746, now seen corresponding path program 1 times [2022-11-16 11:31:37,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:37,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123909684] [2022-11-16 11:31:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:37,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:31:37,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123909684] [2022-11-16 11:31:37,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123909684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:37,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799610682] [2022-11-16 11:31:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:37,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:37,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:37,398 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:37,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c5bcdd3-8ebd-4ae9-9753-1f72446f6151/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:31:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:31:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:31:37,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:37,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799610682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:37,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:31:37,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 11:31:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492730373] [2022-11-16 11:31:37,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:37,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:37,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:31:37,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 307 [2022-11-16 11:31:37,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 460 transitions, 2783 flow. Second operand has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:37,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:37,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 307 [2022-11-16 11:31:37,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand