./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:33:04,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:33:04,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:33:04,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:33:04,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:33:04,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:33:04,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:33:04,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:33:04,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:33:04,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:33:04,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:33:04,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:33:04,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:33:04,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:33:04,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:33:04,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:33:04,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:33:04,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:33:04,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:33:04,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:33:04,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:33:04,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:33:04,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:33:04,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:33:04,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:33:04,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:33:04,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:33:04,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:33:04,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:33:04,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:33:04,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:33:04,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:33:04,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:33:04,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:33:04,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:33:04,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:33:04,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:33:04,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:33:04,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:33:04,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:33:04,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:33:04,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 18:33:04,515 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:33:04,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:33:04,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:33:04,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:33:04,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:33:04,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:33:04,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:33:04,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:33:04,518 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:33:04,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:33:04,518 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:33:04,518 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:33:04,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:33:04,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:33:04,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:33:04,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:33:04,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:33:04,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:33:04,520 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 18:33:04,520 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:33:04,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:33:04,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:33:04,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:33:04,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:33:04,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:33:04,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:33:04,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:33:04,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:33:04,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:33:04,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:33:04,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:33:04,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:33:04,523 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:33:04,523 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:33:04,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:33:04,524 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_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-18 18:33:04,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:33:04,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:33:04,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:33:04,826 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:33:04,828 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:33:04,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-18 18:33:04,922 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/data/5ee8d6d0a/bd51f43d067a46a49add8a1f0eb35687/FLAGa3332c983 [2022-11-18 18:33:05,338 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:33:05,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-18 18:33:05,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/data/5ee8d6d0a/bd51f43d067a46a49add8a1f0eb35687/FLAGa3332c983 [2022-11-18 18:33:05,710 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/data/5ee8d6d0a/bd51f43d067a46a49add8a1f0eb35687 [2022-11-18 18:33:05,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:33:05,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:33:05,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:33:05,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:33:05,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:33:05,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:33:05" (1/1) ... [2022-11-18 18:33:05,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb931b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:05, skipping insertion in model container [2022-11-18 18:33:05,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:33:05" (1/1) ... [2022-11-18 18:33:05,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:33:05,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:33:06,014 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-18 18:33:06,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:33:06,039 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:33:06,089 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-18 18:33:06,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:33:06,113 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:33:06,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06 WrapperNode [2022-11-18 18:33:06,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:33:06,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:33:06,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:33:06,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:33:06,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,168 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 132 [2022-11-18 18:33:06,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:33:06,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:33:06,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:33:06,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:33:06,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,203 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:33:06,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:33:06,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:33:06,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:33:06,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (1/1) ... [2022-11-18 18:33:06,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:33:06,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:06,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:33:06,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:33:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:33:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:33:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:33:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:33:06,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:33:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:33:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:33:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:33:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:33:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:33:06,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:33:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:33:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:33:06,300 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:33:06,396 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:33:06,398 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:33:06,849 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:33:06,859 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:33:06,860 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 18:33:06,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:33:06 BoogieIcfgContainer [2022-11-18 18:33:06,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:33:06,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:33:06,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:33:06,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:33:06,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:33:05" (1/3) ... [2022-11-18 18:33:06,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b696da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:33:06, skipping insertion in model container [2022-11-18 18:33:06,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:06" (2/3) ... [2022-11-18 18:33:06,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b696da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:33:06, skipping insertion in model container [2022-11-18 18:33:06,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:33:06" (3/3) ... [2022-11-18 18:33:06,888 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-18 18:33:06,899 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:33:06,911 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:33:06,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-18 18:33:06,911 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:33:07,091 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:33:07,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 249 transitions, 514 flow [2022-11-18 18:33:07,281 INFO L130 PetriNetUnfolder]: 21/247 cut-off events. [2022-11-18 18:33:07,281 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:33:07,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 247 events. 21/247 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 328 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 169. Up to 3 conditions per place. [2022-11-18 18:33:07,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 249 transitions, 514 flow [2022-11-18 18:33:07,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 212 transitions, 433 flow [2022-11-18 18:33:07,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:33:07,325 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;@47347a92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:33:07,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-18 18:33:07,350 INFO L130 PetriNetUnfolder]: 3/71 cut-off events. [2022-11-18 18:33:07,354 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:33:07,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:07,355 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:07,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1203132096, now seen corresponding path program 1 times [2022-11-18 18:33:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:07,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675770235] [2022-11-18 18:33:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:07,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:07,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675770235] [2022-11-18 18:33:07,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675770235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:07,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:07,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972657374] [2022-11-18 18:33:07,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:07,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:33:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:07,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:33:07,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:33:08,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-18 18:33:08,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 212 transitions, 433 flow. Second operand has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:08,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:08,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-18 18:33:08,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:08,253 INFO L130 PetriNetUnfolder]: 19/328 cut-off events. [2022-11-18 18:33:08,253 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-18 18:33:08,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 328 events. 19/328 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 909 event pairs, 0 based on Foata normal form. 12/296 useless extension candidates. Maximal degree in co-relation 287. Up to 29 conditions per place. [2022-11-18 18:33:08,263 INFO L137 encePairwiseOnDemand]: 228/249 looper letters, 38 selfloop transitions, 9 changer transitions 4/224 dead transitions. [2022-11-18 18:33:08,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 224 transitions, 560 flow [2022-11-18 18:33:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:33:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:33:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1108 transitions. [2022-11-18 18:33:08,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8899598393574297 [2022-11-18 18:33:08,297 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1108 transitions. [2022-11-18 18:33:08,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1108 transitions. [2022-11-18 18:33:08,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:08,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1108 transitions. [2022-11-18 18:33:08,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:08,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:08,325 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:08,327 INFO L175 Difference]: Start difference. First operand has 201 places, 212 transitions, 433 flow. Second operand 5 states and 1108 transitions. [2022-11-18 18:33:08,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 224 transitions, 560 flow [2022-11-18 18:33:08,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 224 transitions, 550 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:33:08,341 INFO L231 Difference]: Finished difference. Result has 205 places, 207 transitions, 471 flow [2022-11-18 18:33:08,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=471, PETRI_PLACES=205, PETRI_TRANSITIONS=207} [2022-11-18 18:33:08,351 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 4 predicate places. [2022-11-18 18:33:08,351 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 207 transitions, 471 flow [2022-11-18 18:33:08,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:08,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:08,353 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:08,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:33:08,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1719939263, now seen corresponding path program 1 times [2022-11-18 18:33:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:08,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789298639] [2022-11-18 18:33:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:08,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:08,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:08,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789298639] [2022-11-18 18:33:08,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789298639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:08,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249423829] [2022-11-18 18:33:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:08,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:08,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:08,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:33:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:08,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:33:08,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:08,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:08,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249423829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:08,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:08,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 18:33:08,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19575171] [2022-11-18 18:33:08,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:08,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:33:08,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:33:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:33:08,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-18 18:33:08,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 207 transitions, 471 flow. Second operand has 12 states, 12 states have (on average 211.66666666666666) internal successors, (2540), 12 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:08,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:08,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-18 18:33:08,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:09,423 INFO L130 PetriNetUnfolder]: 46/700 cut-off events. [2022-11-18 18:33:09,423 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-18 18:33:09,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 700 events. 46/700 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3016 event pairs, 0 based on Foata normal form. 6/616 useless extension candidates. Maximal degree in co-relation 500. Up to 22 conditions per place. [2022-11-18 18:33:09,431 INFO L137 encePairwiseOnDemand]: 234/249 looper letters, 71 selfloop transitions, 40 changer transitions 0/284 dead transitions. [2022-11-18 18:33:09,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 284 transitions, 913 flow [2022-11-18 18:33:09,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:33:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:33:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3879 transitions. [2022-11-18 18:33:09,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8654618473895582 [2022-11-18 18:33:09,441 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3879 transitions. [2022-11-18 18:33:09,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3879 transitions. [2022-11-18 18:33:09,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:09,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3879 transitions. [2022-11-18 18:33:09,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 215.5) internal successors, (3879), 18 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,469 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,469 INFO L175 Difference]: Start difference. First operand has 205 places, 207 transitions, 471 flow. Second operand 18 states and 3879 transitions. [2022-11-18 18:33:09,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 284 transitions, 913 flow [2022-11-18 18:33:09,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 284 transitions, 908 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:09,483 INFO L231 Difference]: Finished difference. Result has 221 places, 234 transitions, 704 flow [2022-11-18 18:33:09,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=704, PETRI_PLACES=221, PETRI_TRANSITIONS=234} [2022-11-18 18:33:09,485 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 20 predicate places. [2022-11-18 18:33:09,485 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 234 transitions, 704 flow [2022-11-18 18:33:09,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.66666666666666) internal successors, (2540), 12 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:09,488 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:09,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:09,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:09,694 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1778509086, now seen corresponding path program 1 times [2022-11-18 18:33:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:09,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405253928] [2022-11-18 18:33:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:09,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:09,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:09,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405253928] [2022-11-18 18:33:09,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405253928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:09,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846511379] [2022-11-18 18:33:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:09,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:09,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:09,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:09,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:33:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:33:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:09,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:09,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846511379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:09,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:09,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 18:33:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585234606] [2022-11-18 18:33:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:09,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:33:09,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:33:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:33:09,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-18 18:33:09,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 234 transitions, 704 flow. Second operand has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:09,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-18 18:33:09,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:10,283 INFO L130 PetriNetUnfolder]: 46/692 cut-off events. [2022-11-18 18:33:10,283 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-18 18:33:10,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 692 events. 46/692 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2982 event pairs, 0 based on Foata normal form. 8/610 useless extension candidates. Maximal degree in co-relation 707. Up to 44 conditions per place. [2022-11-18 18:33:10,289 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 39 selfloop transitions, 27 changer transitions 0/239 dead transitions. [2022-11-18 18:33:10,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 239 transitions, 816 flow [2022-11-18 18:33:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:33:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:33:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1510 transitions. [2022-11-18 18:33:10,294 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8663224325874929 [2022-11-18 18:33:10,294 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1510 transitions. [2022-11-18 18:33:10,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1510 transitions. [2022-11-18 18:33:10,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:10,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1510 transitions. [2022-11-18 18:33:10,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 215.71428571428572) internal successors, (1510), 7 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:10,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:10,303 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:10,304 INFO L175 Difference]: Start difference. First operand has 221 places, 234 transitions, 704 flow. Second operand 7 states and 1510 transitions. [2022-11-18 18:33:10,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 239 transitions, 816 flow [2022-11-18 18:33:10,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 239 transitions, 742 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-18 18:33:10,316 INFO L231 Difference]: Finished difference. Result has 216 places, 226 transitions, 630 flow [2022-11-18 18:33:10,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=216, PETRI_TRANSITIONS=226} [2022-11-18 18:33:10,320 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 15 predicate places. [2022-11-18 18:33:10,320 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 226 transitions, 630 flow [2022-11-18 18:33:10,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:10,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:10,321 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:10,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:10,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:10,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash -696889088, now seen corresponding path program 2 times [2022-11-18 18:33:10,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:10,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136354735] [2022-11-18 18:33:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:10,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:10,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136354735] [2022-11-18 18:33:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136354735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066848320] [2022-11-18 18:33:10,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:33:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:10,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:10,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:33:10,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:33:10,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:33:10,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:33:10,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 18:33:11,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 18:33:11,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066848320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:11,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:11,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-18 18:33:11,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83207494] [2022-11-18 18:33:11,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:11,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:33:11,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:11,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:33:11,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:33:11,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 249 [2022-11-18 18:33:11,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 226 transitions, 630 flow. Second operand has 18 states, 18 states have (on average 183.61111111111111) internal successors, (3305), 18 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:11,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:11,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 249 [2022-11-18 18:33:11,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:13,185 INFO L130 PetriNetUnfolder]: 722/3123 cut-off events. [2022-11-18 18:33:13,185 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2022-11-18 18:33:13,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4622 conditions, 3123 events. 722/3123 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 24275 event pairs, 371 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 3660. Up to 182 conditions per place. [2022-11-18 18:33:13,204 INFO L137 encePairwiseOnDemand]: 229/249 looper letters, 191 selfloop transitions, 65 changer transitions 0/400 dead transitions. [2022-11-18 18:33:13,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 400 transitions, 1573 flow [2022-11-18 18:33:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 18:33:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-18 18:33:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 9080 transitions. [2022-11-18 18:33:13,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7442012949758217 [2022-11-18 18:33:13,221 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 9080 transitions. [2022-11-18 18:33:13,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 9080 transitions. [2022-11-18 18:33:13,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:13,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 9080 transitions. [2022-11-18 18:33:13,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 185.30612244897958) internal successors, (9080), 49 states have internal predecessors, (9080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:13,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 249.0) internal successors, (12450), 50 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:13,270 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 249.0) internal successors, (12450), 50 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:13,270 INFO L175 Difference]: Start difference. First operand has 216 places, 226 transitions, 630 flow. Second operand 49 states and 9080 transitions. [2022-11-18 18:33:13,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 400 transitions, 1573 flow [2022-11-18 18:33:13,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 400 transitions, 1530 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 18:33:13,279 INFO L231 Difference]: Finished difference. Result has 262 places, 251 transitions, 845 flow [2022-11-18 18:33:13,279 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=845, PETRI_PLACES=262, PETRI_TRANSITIONS=251} [2022-11-18 18:33:13,280 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 61 predicate places. [2022-11-18 18:33:13,280 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 251 transitions, 845 flow [2022-11-18 18:33:13,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.61111111111111) internal successors, (3305), 18 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:13,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:13,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:13,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:13,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:13,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2027870170, now seen corresponding path program 1 times [2022-11-18 18:33:13,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:13,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661775274] [2022-11-18 18:33:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:13,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661775274] [2022-11-18 18:33:13,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661775274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:13,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:13,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:33:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339152226] [2022-11-18 18:33:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:33:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:33:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:33:13,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 249 [2022-11-18 18:33:13,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 251 transitions, 845 flow. Second operand has 11 states, 11 states have (on average 163.1818181818182) internal successors, (1795), 11 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:13,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:13,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 249 [2022-11-18 18:33:13,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:15,279 INFO L130 PetriNetUnfolder]: 1289/5611 cut-off events. [2022-11-18 18:33:15,280 INFO L131 PetriNetUnfolder]: For 615/615 co-relation queries the response was YES. [2022-11-18 18:33:15,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8251 conditions, 5611 events. 1289/5611 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 51043 event pairs, 546 based on Foata normal form. 0/4393 useless extension candidates. Maximal degree in co-relation 7076. Up to 951 conditions per place. [2022-11-18 18:33:15,317 INFO L137 encePairwiseOnDemand]: 231/249 looper letters, 136 selfloop transitions, 28 changer transitions 0/317 dead transitions. [2022-11-18 18:33:15,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 317 transitions, 1408 flow [2022-11-18 18:33:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:33:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-18 18:33:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2673 transitions. [2022-11-18 18:33:15,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.670933734939759 [2022-11-18 18:33:15,323 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2673 transitions. [2022-11-18 18:33:15,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2673 transitions. [2022-11-18 18:33:15,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:15,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2673 transitions. [2022-11-18 18:33:15,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.0625) internal successors, (2673), 16 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:15,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:15,338 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:15,338 INFO L175 Difference]: Start difference. First operand has 262 places, 251 transitions, 845 flow. Second operand 16 states and 2673 transitions. [2022-11-18 18:33:15,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 317 transitions, 1408 flow [2022-11-18 18:33:15,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 317 transitions, 1301 flow, removed 13 selfloop flow, removed 15 redundant places. [2022-11-18 18:33:15,347 INFO L231 Difference]: Finished difference. Result has 270 places, 258 transitions, 879 flow [2022-11-18 18:33:15,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=879, PETRI_PLACES=270, PETRI_TRANSITIONS=258} [2022-11-18 18:33:15,348 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 69 predicate places. [2022-11-18 18:33:15,348 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 258 transitions, 879 flow [2022-11-18 18:33:15,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 163.1818181818182) internal successors, (1795), 11 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:15,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:15,349 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:15,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:33:15,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1560533539, now seen corresponding path program 1 times [2022-11-18 18:33:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:15,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708079445] [2022-11-18 18:33:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:15,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:15,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708079445] [2022-11-18 18:33:15,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708079445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:15,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:15,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:33:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048965239] [2022-11-18 18:33:15,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:15,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:33:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:33:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:33:15,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 249 [2022-11-18 18:33:15,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 258 transitions, 879 flow. Second operand has 8 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:15,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:15,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 249 [2022-11-18 18:33:15,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:16,938 INFO L130 PetriNetUnfolder]: 1312/5840 cut-off events. [2022-11-18 18:33:16,941 INFO L131 PetriNetUnfolder]: For 1200/1200 co-relation queries the response was YES. [2022-11-18 18:33:16,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9118 conditions, 5840 events. 1312/5840 cut-off events. For 1200/1200 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 54710 event pairs, 358 based on Foata normal form. 59/5038 useless extension candidates. Maximal degree in co-relation 7795. Up to 1158 conditions per place. [2022-11-18 18:33:16,996 INFO L137 encePairwiseOnDemand]: 235/249 looper letters, 105 selfloop transitions, 20 changer transitions 0/289 dead transitions. [2022-11-18 18:33:16,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 289 transitions, 1222 flow [2022-11-18 18:33:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:33:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-18 18:33:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2150 transitions. [2022-11-18 18:33:17,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7849580138736765 [2022-11-18 18:33:17,005 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2150 transitions. [2022-11-18 18:33:17,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2150 transitions. [2022-11-18 18:33:17,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:17,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2150 transitions. [2022-11-18 18:33:17,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.45454545454547) internal successors, (2150), 11 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:17,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:17,019 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:17,020 INFO L175 Difference]: Start difference. First operand has 270 places, 258 transitions, 879 flow. Second operand 11 states and 2150 transitions. [2022-11-18 18:33:17,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 289 transitions, 1222 flow [2022-11-18 18:33:17,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 289 transitions, 1204 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 18:33:17,032 INFO L231 Difference]: Finished difference. Result has 278 places, 261 transitions, 936 flow [2022-11-18 18:33:17,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=936, PETRI_PLACES=278, PETRI_TRANSITIONS=261} [2022-11-18 18:33:17,034 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 77 predicate places. [2022-11-18 18:33:17,034 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 261 transitions, 936 flow [2022-11-18 18:33:17,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:17,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:17,035 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:17,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:33:17,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1355456156, now seen corresponding path program 1 times [2022-11-18 18:33:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:17,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983341424] [2022-11-18 18:33:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:17,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:17,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:17,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983341424] [2022-11-18 18:33:17,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983341424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:17,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:17,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:17,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258293346] [2022-11-18 18:33:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:17,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:33:17,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:17,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:33:17,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:33:17,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-18 18:33:17,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 261 transitions, 936 flow. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:17,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:17,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-18 18:33:17,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:18,135 INFO L130 PetriNetUnfolder]: 588/4038 cut-off events. [2022-11-18 18:33:18,135 INFO L131 PetriNetUnfolder]: For 934/982 co-relation queries the response was YES. [2022-11-18 18:33:18,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 4038 events. 588/4038 cut-off events. For 934/982 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 38712 event pairs, 202 based on Foata normal form. 14/3672 useless extension candidates. Maximal degree in co-relation 6237. Up to 655 conditions per place. [2022-11-18 18:33:18,164 INFO L137 encePairwiseOnDemand]: 243/249 looper letters, 28 selfloop transitions, 4 changer transitions 0/276 dead transitions. [2022-11-18 18:33:18,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 276 transitions, 1037 flow [2022-11-18 18:33:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:33:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:33:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1129 transitions. [2022-11-18 18:33:18,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9068273092369478 [2022-11-18 18:33:18,167 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1129 transitions. [2022-11-18 18:33:18,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1129 transitions. [2022-11-18 18:33:18,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:18,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1129 transitions. [2022-11-18 18:33:18,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:18,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:18,173 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:18,174 INFO L175 Difference]: Start difference. First operand has 278 places, 261 transitions, 936 flow. Second operand 5 states and 1129 transitions. [2022-11-18 18:33:18,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 276 transitions, 1037 flow [2022-11-18 18:33:18,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 276 transitions, 1008 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-18 18:33:18,185 INFO L231 Difference]: Finished difference. Result has 278 places, 264 transitions, 937 flow [2022-11-18 18:33:18,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=937, PETRI_PLACES=278, PETRI_TRANSITIONS=264} [2022-11-18 18:33:18,187 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 77 predicate places. [2022-11-18 18:33:18,187 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 264 transitions, 937 flow [2022-11-18 18:33:18,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:18,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:18,187 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:18,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:33:18,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash -735611428, now seen corresponding path program 1 times [2022-11-18 18:33:18,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:18,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455855816] [2022-11-18 18:33:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:18,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455855816] [2022-11-18 18:33:18,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455855816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:18,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:18,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:33:18,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045536610] [2022-11-18 18:33:18,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:18,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:33:18,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:33:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:33:18,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 249 [2022-11-18 18:33:18,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 264 transitions, 937 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:18,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:18,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 249 [2022-11-18 18:33:18,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:21,163 INFO L130 PetriNetUnfolder]: 2007/9970 cut-off events. [2022-11-18 18:33:21,163 INFO L131 PetriNetUnfolder]: For 3494/3494 co-relation queries the response was YES. [2022-11-18 18:33:21,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17230 conditions, 9970 events. 2007/9970 cut-off events. For 3494/3494 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 109910 event pairs, 1158 based on Foata normal form. 36/8909 useless extension candidates. Maximal degree in co-relation 14663. Up to 2894 conditions per place. [2022-11-18 18:33:21,240 INFO L137 encePairwiseOnDemand]: 229/249 looper letters, 103 selfloop transitions, 36 changer transitions 0/295 dead transitions. [2022-11-18 18:33:21,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 295 transitions, 1312 flow [2022-11-18 18:33:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:33:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:33:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2973 transitions. [2022-11-18 18:33:21,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6633199464524766 [2022-11-18 18:33:21,247 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2973 transitions. [2022-11-18 18:33:21,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2973 transitions. [2022-11-18 18:33:21,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:21,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2973 transitions. [2022-11-18 18:33:21,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 165.16666666666666) internal successors, (2973), 18 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:21,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:21,262 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:21,263 INFO L175 Difference]: Start difference. First operand has 278 places, 264 transitions, 937 flow. Second operand 18 states and 2973 transitions. [2022-11-18 18:33:21,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 295 transitions, 1312 flow [2022-11-18 18:33:21,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 295 transitions, 1310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:21,282 INFO L231 Difference]: Finished difference. Result has 297 places, 266 transitions, 1042 flow [2022-11-18 18:33:21,283 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1042, PETRI_PLACES=297, PETRI_TRANSITIONS=266} [2022-11-18 18:33:21,284 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 96 predicate places. [2022-11-18 18:33:21,284 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 266 transitions, 1042 flow [2022-11-18 18:33:21,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:21,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:21,285 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:33:21,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash 306531321, now seen corresponding path program 1 times [2022-11-18 18:33:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:21,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726594840] [2022-11-18 18:33:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:21,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:21,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:21,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726594840] [2022-11-18 18:33:21,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726594840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:21,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351054928] [2022-11-18 18:33:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:21,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:21,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:21,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:21,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:33:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:21,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:33:21,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:22,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:22,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351054928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:22,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:22,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2022-11-18 18:33:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936239278] [2022-11-18 18:33:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:22,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:33:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:33:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:33:22,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 249 [2022-11-18 18:33:22,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 266 transitions, 1042 flow. Second operand has 9 states, 9 states have (on average 169.11111111111111) internal successors, (1522), 9 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:22,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:22,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 249 [2022-11-18 18:33:22,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:24,364 INFO L130 PetriNetUnfolder]: 1818/9546 cut-off events. [2022-11-18 18:33:24,364 INFO L131 PetriNetUnfolder]: For 5603/5603 co-relation queries the response was YES. [2022-11-18 18:33:24,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15985 conditions, 9546 events. 1818/9546 cut-off events. For 5603/5603 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 105245 event pairs, 1182 based on Foata normal form. 175/8655 useless extension candidates. Maximal degree in co-relation 14744. Up to 3174 conditions per place. [2022-11-18 18:33:24,418 INFO L137 encePairwiseOnDemand]: 235/249 looper letters, 56 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2022-11-18 18:33:24,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 261 transitions, 1144 flow [2022-11-18 18:33:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:33:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-18 18:33:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1867 transitions. [2022-11-18 18:33:24,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6816356334428624 [2022-11-18 18:33:24,424 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1867 transitions. [2022-11-18 18:33:24,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1867 transitions. [2022-11-18 18:33:24,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:24,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1867 transitions. [2022-11-18 18:33:24,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:24,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:24,438 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:24,438 INFO L175 Difference]: Start difference. First operand has 297 places, 266 transitions, 1042 flow. Second operand 11 states and 1867 transitions. [2022-11-18 18:33:24,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 261 transitions, 1144 flow [2022-11-18 18:33:24,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 261 transitions, 1070 flow, removed 1 selfloop flow, removed 19 redundant places. [2022-11-18 18:33:24,457 INFO L231 Difference]: Finished difference. Result has 285 places, 261 transitions, 958 flow [2022-11-18 18:33:24,458 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=958, PETRI_PLACES=285, PETRI_TRANSITIONS=261} [2022-11-18 18:33:24,460 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 84 predicate places. [2022-11-18 18:33:24,460 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 261 transitions, 958 flow [2022-11-18 18:33:24,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.11111111111111) internal successors, (1522), 9 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:24,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:24,461 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:24,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:24,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 18:33:24,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1978621687, now seen corresponding path program 1 times [2022-11-18 18:33:24,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:24,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753439442] [2022-11-18 18:33:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:24,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:25,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753439442] [2022-11-18 18:33:25,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753439442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:25,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323750166] [2022-11-18 18:33:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:25,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:25,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:25,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:25,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:33:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:33:25,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:25,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:25,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323750166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:25,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:25,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 20 [2022-11-18 18:33:25,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317522008] [2022-11-18 18:33:25,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:25,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:33:25,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:25,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:33:25,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:33:25,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 249 [2022-11-18 18:33:25,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 261 transitions, 958 flow. Second operand has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:25,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:25,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 249 [2022-11-18 18:33:25,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:27,414 INFO L130 PetriNetUnfolder]: 1506/8154 cut-off events. [2022-11-18 18:33:27,415 INFO L131 PetriNetUnfolder]: For 2179/2179 co-relation queries the response was YES. [2022-11-18 18:33:27,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12669 conditions, 8154 events. 1506/8154 cut-off events. For 2179/2179 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 86583 event pairs, 930 based on Foata normal form. 276/7460 useless extension candidates. Maximal degree in co-relation 11110. Up to 2539 conditions per place. [2022-11-18 18:33:27,473 INFO L137 encePairwiseOnDemand]: 231/249 looper letters, 45 selfloop transitions, 29 changer transitions 0/257 dead transitions. [2022-11-18 18:33:27,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 257 transitions, 1076 flow [2022-11-18 18:33:27,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:33:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 18:33:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2195 transitions. [2022-11-18 18:33:27,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6780970033982082 [2022-11-18 18:33:27,477 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2195 transitions. [2022-11-18 18:33:27,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2195 transitions. [2022-11-18 18:33:27,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:27,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2195 transitions. [2022-11-18 18:33:27,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.84615384615384) internal successors, (2195), 13 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:27,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:27,489 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:27,489 INFO L175 Difference]: Start difference. First operand has 285 places, 261 transitions, 958 flow. Second operand 13 states and 2195 transitions. [2022-11-18 18:33:27,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 257 transitions, 1076 flow [2022-11-18 18:33:27,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 257 transitions, 1010 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-11-18 18:33:27,504 INFO L231 Difference]: Finished difference. Result has 279 places, 257 transitions, 920 flow [2022-11-18 18:33:27,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=920, PETRI_PLACES=279, PETRI_TRANSITIONS=257} [2022-11-18 18:33:27,507 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 78 predicate places. [2022-11-18 18:33:27,508 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 257 transitions, 920 flow [2022-11-18 18:33:27,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:27,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:27,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:27,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:27,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:33:27,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1003320504, now seen corresponding path program 1 times [2022-11-18 18:33:27,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:27,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990596658] [2022-11-18 18:33:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:27,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:27,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:27,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990596658] [2022-11-18 18:33:27,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990596658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:27,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:27,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308321400] [2022-11-18 18:33:27,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:27,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:33:27,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:33:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:33:27,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-18 18:33:27,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 257 transitions, 920 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:27,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:27,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-18 18:33:27,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:29,177 INFO L130 PetriNetUnfolder]: 1746/7178 cut-off events. [2022-11-18 18:33:29,177 INFO L131 PetriNetUnfolder]: For 1583/1607 co-relation queries the response was YES. [2022-11-18 18:33:29,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11071 conditions, 7178 events. 1746/7178 cut-off events. For 1583/1607 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 83254 event pairs, 684 based on Foata normal form. 0/5626 useless extension candidates. Maximal degree in co-relation 9404. Up to 1709 conditions per place. [2022-11-18 18:33:29,212 INFO L137 encePairwiseOnDemand]: 243/249 looper letters, 27 selfloop transitions, 4 changer transitions 0/271 dead transitions. [2022-11-18 18:33:29,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 271 transitions, 1013 flow [2022-11-18 18:33:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:33:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:33:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2022-11-18 18:33:29,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9060240963855422 [2022-11-18 18:33:29,215 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2022-11-18 18:33:29,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2022-11-18 18:33:29,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:29,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2022-11-18 18:33:29,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:29,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:29,220 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:29,220 INFO L175 Difference]: Start difference. First operand has 279 places, 257 transitions, 920 flow. Second operand 5 states and 1128 transitions. [2022-11-18 18:33:29,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 271 transitions, 1013 flow [2022-11-18 18:33:29,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 271 transitions, 955 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-18 18:33:29,228 INFO L231 Difference]: Finished difference. Result has 274 places, 260 transitions, 892 flow [2022-11-18 18:33:29,229 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=892, PETRI_PLACES=274, PETRI_TRANSITIONS=260} [2022-11-18 18:33:29,230 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 73 predicate places. [2022-11-18 18:33:29,230 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 260 transitions, 892 flow [2022-11-18 18:33:29,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:29,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:29,231 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:29,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:33:29,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2144894863, now seen corresponding path program 1 times [2022-11-18 18:33:29,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:29,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496573134] [2022-11-18 18:33:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:33:29,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:29,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496573134] [2022-11-18 18:33:29,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496573134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:29,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:29,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:33:29,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985976477] [2022-11-18 18:33:29,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:29,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:33:29,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:33:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:33:29,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-18 18:33:29,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 260 transitions, 892 flow. Second operand has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 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) [2022-11-18 18:33:29,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:29,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-18 18:33:29,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:31,619 INFO L130 PetriNetUnfolder]: 2969/11438 cut-off events. [2022-11-18 18:33:31,619 INFO L131 PetriNetUnfolder]: For 2263/2305 co-relation queries the response was YES. [2022-11-18 18:33:31,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20197 conditions, 11438 events. 2969/11438 cut-off events. For 2263/2305 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 125755 event pairs, 1941 based on Foata normal form. 7/9947 useless extension candidates. Maximal degree in co-relation 17265. Up to 4348 conditions per place. [2022-11-18 18:33:31,665 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 118 selfloop transitions, 22 changer transitions 5/311 dead transitions. [2022-11-18 18:33:31,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 311 transitions, 1385 flow [2022-11-18 18:33:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:33:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 18:33:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1944 transitions. [2022-11-18 18:33:31,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7807228915662651 [2022-11-18 18:33:31,669 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1944 transitions. [2022-11-18 18:33:31,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1944 transitions. [2022-11-18 18:33:31,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:31,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1944 transitions. [2022-11-18 18:33:31,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.4) internal successors, (1944), 10 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,678 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,678 INFO L175 Difference]: Start difference. First operand has 274 places, 260 transitions, 892 flow. Second operand 10 states and 1944 transitions. [2022-11-18 18:33:31,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 311 transitions, 1385 flow [2022-11-18 18:33:31,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 311 transitions, 1383 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:31,692 INFO L231 Difference]: Finished difference. Result has 284 places, 261 transitions, 947 flow [2022-11-18 18:33:31,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=947, PETRI_PLACES=284, PETRI_TRANSITIONS=261} [2022-11-18 18:33:31,693 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 83 predicate places. [2022-11-18 18:33:31,693 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 261 transitions, 947 flow [2022-11-18 18:33:31,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 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) [2022-11-18 18:33:31,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:31,694 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:31,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:33:31,695 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1873100685, now seen corresponding path program 1 times [2022-11-18 18:33:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:31,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978296739] [2022-11-18 18:33:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:33:31,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:31,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978296739] [2022-11-18 18:33:31,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978296739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:31,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:31,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:33:31,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55617333] [2022-11-18 18:33:31,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:31,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:33:31,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:31,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:33:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:33:31,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-18 18:33:31,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 261 transitions, 947 flow. Second operand has 7 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:31,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-18 18:33:31,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:33,944 INFO L130 PetriNetUnfolder]: 3151/11597 cut-off events. [2022-11-18 18:33:33,944 INFO L131 PetriNetUnfolder]: For 3261/3326 co-relation queries the response was YES. [2022-11-18 18:33:33,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20494 conditions, 11597 events. 3151/11597 cut-off events. For 3261/3326 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 124441 event pairs, 2156 based on Foata normal form. 41/10578 useless extension candidates. Maximal degree in co-relation 17838. Up to 5003 conditions per place. [2022-11-18 18:33:34,010 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 94 selfloop transitions, 21 changer transitions 28/309 dead transitions. [2022-11-18 18:33:34,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 309 transitions, 1426 flow [2022-11-18 18:33:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:33:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 18:33:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1941 transitions. [2022-11-18 18:33:34,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7795180722891566 [2022-11-18 18:33:34,015 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1941 transitions. [2022-11-18 18:33:34,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1941 transitions. [2022-11-18 18:33:34,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:34,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1941 transitions. [2022-11-18 18:33:34,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.1) internal successors, (1941), 10 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,026 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,026 INFO L175 Difference]: Start difference. First operand has 284 places, 261 transitions, 947 flow. Second operand 10 states and 1941 transitions. [2022-11-18 18:33:34,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 309 transitions, 1426 flow [2022-11-18 18:33:34,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 309 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-18 18:33:34,044 INFO L231 Difference]: Finished difference. Result has 288 places, 260 transitions, 949 flow [2022-11-18 18:33:34,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=949, PETRI_PLACES=288, PETRI_TRANSITIONS=260} [2022-11-18 18:33:34,045 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 87 predicate places. [2022-11-18 18:33:34,045 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 260 transitions, 949 flow [2022-11-18 18:33:34,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:34,046 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:34,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:33:34,047 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1253562000, now seen corresponding path program 1 times [2022-11-18 18:33:34,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181474612] [2022-11-18 18:33:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:34,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 18:33:34,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181474612] [2022-11-18 18:33:34,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181474612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:34,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:34,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:33:34,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528741208] [2022-11-18 18:33:34,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:34,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:33:34,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:33:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:33:34,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-18 18:33:34,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 260 transitions, 949 flow. Second operand has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:34,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-18 18:33:34,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:35,724 INFO L130 PetriNetUnfolder]: 2112/8192 cut-off events. [2022-11-18 18:33:35,724 INFO L131 PetriNetUnfolder]: For 2414/2445 co-relation queries the response was YES. [2022-11-18 18:33:35,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15137 conditions, 8192 events. 2112/8192 cut-off events. For 2414/2445 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 83911 event pairs, 1614 based on Foata normal form. 11/7526 useless extension candidates. Maximal degree in co-relation 14319. Up to 3808 conditions per place. [2022-11-18 18:33:35,758 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 95 selfloop transitions, 15 changer transitions 6/282 dead transitions. [2022-11-18 18:33:35,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 282 transitions, 1246 flow [2022-11-18 18:33:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:33:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 18:33:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1560 transitions. [2022-11-18 18:33:35,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7831325301204819 [2022-11-18 18:33:35,761 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1560 transitions. [2022-11-18 18:33:35,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1560 transitions. [2022-11-18 18:33:35,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:35,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1560 transitions. [2022-11-18 18:33:35,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,768 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,768 INFO L175 Difference]: Start difference. First operand has 288 places, 260 transitions, 949 flow. Second operand 8 states and 1560 transitions. [2022-11-18 18:33:35,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 282 transitions, 1246 flow [2022-11-18 18:33:35,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 282 transitions, 1193 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-11-18 18:33:35,781 INFO L231 Difference]: Finished difference. Result has 284 places, 261 transitions, 943 flow [2022-11-18 18:33:35,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=284, PETRI_TRANSITIONS=261} [2022-11-18 18:33:35,783 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 83 predicate places. [2022-11-18 18:33:35,783 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 261 transitions, 943 flow [2022-11-18 18:33:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:35,784 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 18:33:35,784 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash -290208942, now seen corresponding path program 1 times [2022-11-18 18:33:35,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243192166] [2022-11-18 18:33:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 18:33:35,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:35,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243192166] [2022-11-18 18:33:35,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243192166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:35,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:35,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:33:35,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100336259] [2022-11-18 18:33:35,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:35,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:33:35,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:33:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:33:35,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-18 18:33:35,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 261 transitions, 943 flow. Second operand has 7 states, 7 states have (on average 190.42857142857142) internal successors, (1333), 7 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:35,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-18 18:33:35,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:37,620 INFO L130 PetriNetUnfolder]: 2567/9582 cut-off events. [2022-11-18 18:33:37,621 INFO L131 PetriNetUnfolder]: For 2870/2875 co-relation queries the response was YES. [2022-11-18 18:33:37,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16964 conditions, 9582 events. 2567/9582 cut-off events. For 2870/2875 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 99417 event pairs, 1830 based on Foata normal form. 5/8745 useless extension candidates. Maximal degree in co-relation 16154. Up to 4354 conditions per place. [2022-11-18 18:33:37,664 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 80 selfloop transitions, 13 changer transitions 21/280 dead transitions. [2022-11-18 18:33:37,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 280 transitions, 1222 flow [2022-11-18 18:33:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:33:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 18:33:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1557 transitions. [2022-11-18 18:33:37,668 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7816265060240963 [2022-11-18 18:33:37,668 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1557 transitions. [2022-11-18 18:33:37,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1557 transitions. [2022-11-18 18:33:37,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:37,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1557 transitions. [2022-11-18 18:33:37,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,676 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,677 INFO L175 Difference]: Start difference. First operand has 284 places, 261 transitions, 943 flow. Second operand 8 states and 1557 transitions. [2022-11-18 18:33:37,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 280 transitions, 1222 flow [2022-11-18 18:33:37,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 280 transitions, 1195 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 18:33:37,694 INFO L231 Difference]: Finished difference. Result has 288 places, 257 transitions, 921 flow [2022-11-18 18:33:37,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=921, PETRI_PLACES=288, PETRI_TRANSITIONS=257} [2022-11-18 18:33:37,695 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 87 predicate places. [2022-11-18 18:33:37,696 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 257 transitions, 921 flow [2022-11-18 18:33:37,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.42857142857142) internal successors, (1333), 7 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:37,697 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:37,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 18:33:37,697 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:37,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1000289064, now seen corresponding path program 1 times [2022-11-18 18:33:37,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:37,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880938723] [2022-11-18 18:33:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:37,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:37,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:37,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880938723] [2022-11-18 18:33:37,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880938723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612280919] [2022-11-18 18:33:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:37,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:37,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:37,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:37,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:33:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:33:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:38,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:38,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612280919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:38,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:38,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-18 18:33:38,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586807105] [2022-11-18 18:33:38,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:38,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 18:33:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 18:33:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-11-18 18:33:38,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 249 [2022-11-18 18:33:38,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 257 transitions, 921 flow. Second operand has 28 states, 28 states have (on average 173.10714285714286) internal successors, (4847), 28 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:38,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:38,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 249 [2022-11-18 18:33:38,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:43,154 INFO L130 PetriNetUnfolder]: 3773/14709 cut-off events. [2022-11-18 18:33:43,154 INFO L131 PetriNetUnfolder]: For 4137/4148 co-relation queries the response was YES. [2022-11-18 18:33:43,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27796 conditions, 14709 events. 3773/14709 cut-off events. For 4137/4148 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 175063 event pairs, 2093 based on Foata normal form. 90/13731 useless extension candidates. Maximal degree in co-relation 23036. Up to 3705 conditions per place. [2022-11-18 18:33:43,224 INFO L137 encePairwiseOnDemand]: 223/249 looper letters, 221 selfloop transitions, 78 changer transitions 62/499 dead transitions. [2022-11-18 18:33:43,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 499 transitions, 2493 flow [2022-11-18 18:33:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 18:33:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-18 18:33:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 8922 transitions. [2022-11-18 18:33:43,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7025750059059769 [2022-11-18 18:33:43,235 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 8922 transitions. [2022-11-18 18:33:43,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 8922 transitions. [2022-11-18 18:33:43,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:43,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 8922 transitions. [2022-11-18 18:33:43,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 174.94117647058823) internal successors, (8922), 51 states have internal predecessors, (8922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:43,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 249.0) internal successors, (12948), 52 states have internal predecessors, (12948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:43,269 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 249.0) internal successors, (12948), 52 states have internal predecessors, (12948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:43,270 INFO L175 Difference]: Start difference. First operand has 288 places, 257 transitions, 921 flow. Second operand 51 states and 8922 transitions. [2022-11-18 18:33:43,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 499 transitions, 2493 flow [2022-11-18 18:33:43,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 499 transitions, 2373 flow, removed 27 selfloop flow, removed 10 redundant places. [2022-11-18 18:33:43,299 INFO L231 Difference]: Finished difference. Result has 328 places, 291 transitions, 1230 flow [2022-11-18 18:33:43,300 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1230, PETRI_PLACES=328, PETRI_TRANSITIONS=291} [2022-11-18 18:33:43,301 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 127 predicate places. [2022-11-18 18:33:43,301 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 291 transitions, 1230 flow [2022-11-18 18:33:43,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.10714285714286) internal successors, (4847), 28 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:43,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:43,302 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:43,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:43,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:33:43,507 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:43,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1475550310, now seen corresponding path program 1 times [2022-11-18 18:33:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954274884] [2022-11-18 18:33:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:43,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954274884] [2022-11-18 18:33:43,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954274884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048192406] [2022-11-18 18:33:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:43,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:43,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:44,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:33:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:44,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:33:44,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:44,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048192406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:44,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:44,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-18 18:33:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792888440] [2022-11-18 18:33:44,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:44,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 18:33:44,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 18:33:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-11-18 18:33:44,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 249 [2022-11-18 18:33:44,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 291 transitions, 1230 flow. Second operand has 28 states, 28 states have (on average 173.17857142857142) internal successors, (4849), 28 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:44,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:44,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 249 [2022-11-18 18:33:44,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:49,621 INFO L130 PetriNetUnfolder]: 4841/17239 cut-off events. [2022-11-18 18:33:49,621 INFO L131 PetriNetUnfolder]: For 10722/10941 co-relation queries the response was YES. [2022-11-18 18:33:49,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32680 conditions, 17239 events. 4841/17239 cut-off events. For 10722/10941 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 209579 event pairs, 2051 based on Foata normal form. 219/15834 useless extension candidates. Maximal degree in co-relation 27011. Up to 4420 conditions per place. [2022-11-18 18:33:49,715 INFO L137 encePairwiseOnDemand]: 223/249 looper letters, 120 selfloop transitions, 55 changer transitions 190/503 dead transitions. [2022-11-18 18:33:49,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 503 transitions, 2655 flow [2022-11-18 18:33:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 18:33:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-18 18:33:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 8745 transitions. [2022-11-18 18:33:49,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7024096385542169 [2022-11-18 18:33:49,724 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 8745 transitions. [2022-11-18 18:33:49,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 8745 transitions. [2022-11-18 18:33:49,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:49,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 8745 transitions. [2022-11-18 18:33:49,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 174.9) internal successors, (8745), 50 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:49,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:49,756 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:49,756 INFO L175 Difference]: Start difference. First operand has 328 places, 291 transitions, 1230 flow. Second operand 50 states and 8745 transitions. [2022-11-18 18:33:49,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 503 transitions, 2655 flow [2022-11-18 18:33:49,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 503 transitions, 2572 flow, removed 6 selfloop flow, removed 19 redundant places. [2022-11-18 18:33:49,801 INFO L231 Difference]: Finished difference. Result has 375 places, 275 transitions, 1179 flow [2022-11-18 18:33:49,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1179, PETRI_PLACES=375, PETRI_TRANSITIONS=275} [2022-11-18 18:33:49,802 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 174 predicate places. [2022-11-18 18:33:49,802 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 275 transitions, 1179 flow [2022-11-18 18:33:49,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.17857142857142) internal successors, (4849), 28 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:49,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:49,804 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:49,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:50,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 18:33:50,009 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:50,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1960128126, now seen corresponding path program 1 times [2022-11-18 18:33:50,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:50,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015125754] [2022-11-18 18:33:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:50,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:50,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:50,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015125754] [2022-11-18 18:33:50,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015125754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:50,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410900521] [2022-11-18 18:33:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:50,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:50,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:50,624 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:50,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:33:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:50,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 18:33:50,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:50,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:51,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410900521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:51,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:51,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-18 18:33:51,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693391038] [2022-11-18 18:33:51,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:51,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 18:33:51,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:51,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 18:33:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-11-18 18:33:51,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-18 18:33:51,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 275 transitions, 1179 flow. Second operand has 32 states, 32 states have (on average 212.28125) internal successors, (6793), 32 states have internal predecessors, (6793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:51,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:51,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-18 18:33:51,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:52,770 INFO L130 PetriNetUnfolder]: 120/3824 cut-off events. [2022-11-18 18:33:52,771 INFO L131 PetriNetUnfolder]: For 2403/2429 co-relation queries the response was YES. [2022-11-18 18:33:52,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 3824 events. 120/3824 cut-off events. For 2403/2429 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 30479 event pairs, 0 based on Foata normal form. 24/3653 useless extension candidates. Maximal degree in co-relation 5714. Up to 98 conditions per place. [2022-11-18 18:33:52,795 INFO L137 encePairwiseOnDemand]: 237/249 looper letters, 208 selfloop transitions, 119 changer transitions 0/513 dead transitions. [2022-11-18 18:33:52,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 513 transitions, 2996 flow [2022-11-18 18:33:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 18:33:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-18 18:33:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 9498 transitions. [2022-11-18 18:33:52,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8669222343921139 [2022-11-18 18:33:52,806 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 9498 transitions. [2022-11-18 18:33:52,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 9498 transitions. [2022-11-18 18:33:52,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:52,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 9498 transitions. [2022-11-18 18:33:52,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 215.86363636363637) internal successors, (9498), 44 states have internal predecessors, (9498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:52,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:52,834 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:52,835 INFO L175 Difference]: Start difference. First operand has 375 places, 275 transitions, 1179 flow. Second operand 44 states and 9498 transitions. [2022-11-18 18:33:52,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 513 transitions, 2996 flow [2022-11-18 18:33:52,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 513 transitions, 2743 flow, removed 26 selfloop flow, removed 51 redundant places. [2022-11-18 18:33:52,856 INFO L231 Difference]: Finished difference. Result has 344 places, 343 transitions, 1793 flow [2022-11-18 18:33:52,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1793, PETRI_PLACES=344, PETRI_TRANSITIONS=343} [2022-11-18 18:33:52,857 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 143 predicate places. [2022-11-18 18:33:52,857 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 343 transitions, 1793 flow [2022-11-18 18:33:52,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 212.28125) internal successors, (6793), 32 states have internal predecessors, (6793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:52,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:52,859 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:52,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:53,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:33:53,065 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1817064977, now seen corresponding path program 2 times [2022-11-18 18:33:53,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748885391] [2022-11-18 18:33:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:53,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:33:53,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748885391] [2022-11-18 18:33:53,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748885391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:53,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520774951] [2022-11-18 18:33:53,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:33:53,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:53,342 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:53,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:33:53,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:33:53,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:33:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:33:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 18:33:53,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 18:33:53,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520774951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:53,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:53,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-18 18:33:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118095171] [2022-11-18 18:33:53,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:53,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:33:53,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:33:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:33:53,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 249 [2022-11-18 18:33:53,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 343 transitions, 1793 flow. Second operand has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:53,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:53,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 249 [2022-11-18 18:33:53,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:59,428 INFO L130 PetriNetUnfolder]: 7998/28043 cut-off events. [2022-11-18 18:33:59,428 INFO L131 PetriNetUnfolder]: For 4946/4959 co-relation queries the response was YES. [2022-11-18 18:33:59,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50203 conditions, 28043 events. 7998/28043 cut-off events. For 4946/4959 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 328734 event pairs, 741 based on Foata normal form. 325/24817 useless extension candidates. Maximal degree in co-relation 49599. Up to 3224 conditions per place. [2022-11-18 18:33:59,575 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 106 selfloop transitions, 15 changer transitions 0/430 dead transitions. [2022-11-18 18:33:59,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 430 transitions, 2260 flow [2022-11-18 18:33:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:33:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 18:33:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2736 transitions. [2022-11-18 18:33:59,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.845227062094532 [2022-11-18 18:33:59,579 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2736 transitions. [2022-11-18 18:33:59,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2736 transitions. [2022-11-18 18:33:59,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:59,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2736 transitions. [2022-11-18 18:33:59,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 210.46153846153845) internal successors, (2736), 13 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:59,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:59,587 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:59,587 INFO L175 Difference]: Start difference. First operand has 344 places, 343 transitions, 1793 flow. Second operand 13 states and 2736 transitions. [2022-11-18 18:33:59,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 430 transitions, 2260 flow [2022-11-18 18:33:59,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 430 transitions, 2178 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-11-18 18:33:59,628 INFO L231 Difference]: Finished difference. Result has 342 places, 347 transitions, 1768 flow [2022-11-18 18:33:59,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1768, PETRI_PLACES=342, PETRI_TRANSITIONS=347} [2022-11-18 18:33:59,629 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 141 predicate places. [2022-11-18 18:33:59,629 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 347 transitions, 1768 flow [2022-11-18 18:33:59,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:59,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:59,630 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:59,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:59,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:59,835 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:33:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 494440085, now seen corresponding path program 1 times [2022-11-18 18:33:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599413018] [2022-11-18 18:33:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:33:59,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599413018] [2022-11-18 18:33:59,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599413018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541385500] [2022-11-18 18:33:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:59,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:59,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:59,966 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:59,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:34:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:34:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:34:00,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:00,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541385500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:00,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:00,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 18:34:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719805330] [2022-11-18 18:34:00,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:00,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:34:00,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:34:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:34:00,143 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-18 18:34:00,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 347 transitions, 1768 flow. Second operand has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:00,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:00,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-18 18:34:00,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:01,651 INFO L130 PetriNetUnfolder]: 627/6333 cut-off events. [2022-11-18 18:34:01,652 INFO L131 PetriNetUnfolder]: For 2098/2111 co-relation queries the response was YES. [2022-11-18 18:34:01,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11117 conditions, 6333 events. 627/6333 cut-off events. For 2098/2111 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 59634 event pairs, 0 based on Foata normal form. 65/6019 useless extension candidates. Maximal degree in co-relation 10547. Up to 728 conditions per place. [2022-11-18 18:34:01,683 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 29 selfloop transitions, 8 changer transitions 0/360 dead transitions. [2022-11-18 18:34:01,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 360 transitions, 1873 flow [2022-11-18 18:34:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:34:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:34:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1567 transitions. [2022-11-18 18:34:01,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8990246701090074 [2022-11-18 18:34:01,685 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1567 transitions. [2022-11-18 18:34:01,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1567 transitions. [2022-11-18 18:34:01,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:01,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1567 transitions. [2022-11-18 18:34:01,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 223.85714285714286) internal successors, (1567), 7 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) [2022-11-18 18:34:01,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:01,688 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:01,689 INFO L175 Difference]: Start difference. First operand has 342 places, 347 transitions, 1768 flow. Second operand 7 states and 1567 transitions. [2022-11-18 18:34:01,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 360 transitions, 1873 flow [2022-11-18 18:34:01,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 360 transitions, 1838 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-18 18:34:01,709 INFO L231 Difference]: Finished difference. Result has 337 places, 345 transitions, 1736 flow [2022-11-18 18:34:01,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=337, PETRI_TRANSITIONS=345} [2022-11-18 18:34:01,711 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 136 predicate places. [2022-11-18 18:34:01,711 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 345 transitions, 1736 flow [2022-11-18 18:34:01,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:01,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:01,711 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:01,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 18:34:01,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:01,917 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:34:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:01,917 INFO L85 PathProgramCache]: Analyzing trace with hash 533380627, now seen corresponding path program 2 times [2022-11-18 18:34:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:01,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986896617] [2022-11-18 18:34:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:34:02,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:02,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986896617] [2022-11-18 18:34:02,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986896617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000045792] [2022-11-18 18:34:02,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:34:02,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:02,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:02,039 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:02,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:34:02,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:34:02,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:34:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:34:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 18:34:02,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 18:34:02,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000045792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:02,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:02,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-18 18:34:02,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264064096] [2022-11-18 18:34:02,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:02,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:34:02,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:34:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:34:02,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 249 [2022-11-18 18:34:02,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 345 transitions, 1736 flow. Second operand has 10 states, 10 states have (on average 205.2) internal successors, (2052), 10 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:02,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:02,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 249 [2022-11-18 18:34:02,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:13,991 INFO L130 PetriNetUnfolder]: 18736/58827 cut-off events. [2022-11-18 18:34:13,991 INFO L131 PetriNetUnfolder]: For 16321/17413 co-relation queries the response was YES. [2022-11-18 18:34:14,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107890 conditions, 58827 events. 18736/58827 cut-off events. For 16321/17413 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 758526 event pairs, 1599 based on Foata normal form. 1846/55107 useless extension candidates. Maximal degree in co-relation 107294. Up to 6981 conditions per place. [2022-11-18 18:34:14,335 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 113 selfloop transitions, 15 changer transitions 0/438 dead transitions. [2022-11-18 18:34:14,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 438 transitions, 2262 flow [2022-11-18 18:34:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:34:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 18:34:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2733 transitions. [2022-11-18 18:34:14,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8443002780352178 [2022-11-18 18:34:14,339 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2733 transitions. [2022-11-18 18:34:14,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2733 transitions. [2022-11-18 18:34:14,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:14,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2733 transitions. [2022-11-18 18:34:14,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 210.23076923076923) internal successors, (2733), 13 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:14,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:14,347 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:14,347 INFO L175 Difference]: Start difference. First operand has 337 places, 345 transitions, 1736 flow. Second operand 13 states and 2733 transitions. [2022-11-18 18:34:14,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 438 transitions, 2262 flow [2022-11-18 18:34:14,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 438 transitions, 2246 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 18:34:14,451 INFO L231 Difference]: Finished difference. Result has 344 places, 349 transitions, 1777 flow [2022-11-18 18:34:14,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1777, PETRI_PLACES=344, PETRI_TRANSITIONS=349} [2022-11-18 18:34:14,452 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 143 predicate places. [2022-11-18 18:34:14,452 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 349 transitions, 1777 flow [2022-11-18 18:34:14,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.2) internal successors, (2052), 10 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:14,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:14,453 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:14,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:14,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:14,658 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:34:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash -645069063, now seen corresponding path program 1 times [2022-11-18 18:34:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:14,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791840398] [2022-11-18 18:34:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:14,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:34:14,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:14,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791840398] [2022-11-18 18:34:14,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791840398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196211343] [2022-11-18 18:34:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:14,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:14,776 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:14,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:34:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:14,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:34:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:34:14,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:14,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196211343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:14,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:14,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 18:34:14,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38807779] [2022-11-18 18:34:14,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:14,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:34:14,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:34:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:34:14,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-18 18:34:14,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 349 transitions, 1777 flow. Second operand has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:14,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:14,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-18 18:34:14,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:18,386 INFO L130 PetriNetUnfolder]: 4397/17812 cut-off events. [2022-11-18 18:34:18,386 INFO L131 PetriNetUnfolder]: For 8789/8867 co-relation queries the response was YES. [2022-11-18 18:34:18,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31177 conditions, 17812 events. 4397/17812 cut-off events. For 8789/8867 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 234948 event pairs, 0 based on Foata normal form. 234/14144 useless extension candidates. Maximal degree in co-relation 30581. Up to 3770 conditions per place. [2022-11-18 18:34:18,475 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 0 selfloop transitions, 0 changer transitions 119/360 dead transitions. [2022-11-18 18:34:18,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 360 transitions, 1867 flow [2022-11-18 18:34:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:34:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:34:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1565 transitions. [2022-11-18 18:34:18,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.897877223178428 [2022-11-18 18:34:18,477 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1565 transitions. [2022-11-18 18:34:18,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1565 transitions. [2022-11-18 18:34:18,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:18,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1565 transitions. [2022-11-18 18:34:18,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 223.57142857142858) internal successors, (1565), 7 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:18,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:18,482 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:18,482 INFO L175 Difference]: Start difference. First operand has 344 places, 349 transitions, 1777 flow. Second operand 7 states and 1565 transitions. [2022-11-18 18:34:18,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 360 transitions, 1867 flow [2022-11-18 18:34:18,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 360 transitions, 1832 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-18 18:34:18,522 INFO L231 Difference]: Finished difference. Result has 339 places, 241 transitions, 1451 flow [2022-11-18 18:34:18,523 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1451, PETRI_PLACES=339, PETRI_TRANSITIONS=241} [2022-11-18 18:34:18,523 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 138 predicate places. [2022-11-18 18:34:18,523 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 241 transitions, 1451 flow [2022-11-18 18:34:18,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:18,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:18,524 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:18,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:18,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 18:34:18,729 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-18 18:34:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1587512962, now seen corresponding path program 2 times [2022-11-18 18:34:18,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433552390] [2022-11-18 18:34:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:18,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:19,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:19,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433552390] [2022-11-18 18:34:19,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433552390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:19,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005306032] [2022-11-18 18:34:19,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:34:19,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:19,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:19,972 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:19,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397cf68b-6249-4243-acb6-c3921d008ff7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:34:20,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:34:20,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:34:20,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:34:20,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2022-11-18 18:34:20,484 INFO L328 TraceCheckSpWp]: Computing backward predicates...