./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/fib_safe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8 --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 ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 --- 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-2329fc7 [2022-12-13 18:53:16,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:53:16,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:53:16,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:53:16,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:53:16,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:53:16,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:53:16,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:53:16,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:53:16,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:53:16,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:53:16,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:53:16,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:53:16,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:53:16,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:53:16,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:53:16,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:53:16,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:53:16,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:53:16,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:53:16,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:53:16,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:53:16,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:53:16,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:53:16,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:53:16,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:53:16,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:53:16,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:53:16,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:53:16,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:53:16,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:53:16,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:53:16,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:53:16,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:53:16,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:53:16,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:53:16,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:53:16,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:53:16,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:53:16,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:53:16,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:53:16,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 18:53:16,360 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:53:16,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:53:16,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:53:16,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:53:16,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:53:16,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:53:16,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:53:16,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:53:16,363 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:53:16,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:53:16,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:53:16,364 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:53:16,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:53:16,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:53:16,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:53:16,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:53:16,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:53:16,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:53:16,365 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 18:53:16,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:53:16,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:53:16,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:53:16,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:53:16,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:53:16,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:53:16,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:53:16,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:53:16,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:53:16,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:53:16,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:53:16,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:53:16,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:53:16,367 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:53:16,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:53:16,367 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:53:16,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:53:16,367 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:53:16,367 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 [2022-12-13 18:53:16,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:53:16,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:53:16,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:53:16,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:53:16,587 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:53:16,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_safe-6.i [2022-12-13 18:53:19,075 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:53:19,272 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:53:19,272 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/sv-benchmarks/c/pthread/fib_safe-6.i [2022-12-13 18:53:19,281 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/data/6e0d07e85/8e4269a99516466d93d7f874e20c9162/FLAG3af0ebbcb [2022-12-13 18:53:19,649 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/data/6e0d07e85/8e4269a99516466d93d7f874e20c9162 [2022-12-13 18:53:19,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:53:19,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:53:19,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:53:19,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:53:19,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:53:19,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12636e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19, skipping insertion in model container [2022-12-13 18:53:19,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:53:19,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:53:19,882 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/sv-benchmarks/c/pthread/fib_safe-6.i[30241,30254] [2022-12-13 18:53:19,887 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,888 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,894 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,894 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,894 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,898 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:53:19,906 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:53:19,927 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/sv-benchmarks/c/pthread/fib_safe-6.i[30241,30254] [2022-12-13 18:53:19,928 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,928 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,929 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,929 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:19,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:19,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:53:19,953 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:53:19,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19 WrapperNode [2022-12-13 18:53:19,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:53:19,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:53:19,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:53:19,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:53:19,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,982 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-12-13 18:53:19,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:53:19,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:53:19,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:53:19,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:53:19,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,998 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:19,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:20,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:53:20,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:53:20,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:53:20,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:53:20,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (1/1) ... [2022-12-13 18:53:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:53:20,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:20,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:53:20,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:53:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 18:53:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 18:53:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 18:53:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 18:53:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:53:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:53:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:53:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:53:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:53:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:53:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:53:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:53:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:53:20,060 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:53:20,156 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:53:20,158 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:53:20,327 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:53:20,343 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:53:20,343 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 18:53:20,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:53:20 BoogieIcfgContainer [2022-12-13 18:53:20,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:53:20,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:53:20,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:53:20,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:53:20,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:53:19" (1/3) ... [2022-12-13 18:53:20,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee3cbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:53:20, skipping insertion in model container [2022-12-13 18:53:20,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:19" (2/3) ... [2022-12-13 18:53:20,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee3cbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:53:20, skipping insertion in model container [2022-12-13 18:53:20,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:53:20" (3/3) ... [2022-12-13 18:53:20,352 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2022-12-13 18:53:20,358 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 18:53:20,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:53:20,366 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-12-13 18:53:20,366 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:53:20,407 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:53:20,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 120 transitions, 250 flow [2022-12-13 18:53:20,465 INFO L130 PetriNetUnfolder]: 7/118 cut-off events. [2022-12-13 18:53:20,465 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:53:20,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 118 events. 7/118 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 150 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2022-12-13 18:53:20,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 120 transitions, 250 flow [2022-12-13 18:53:20,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 118 transitions, 242 flow [2022-12-13 18:53:20,477 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:53:20,484 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 118 transitions, 242 flow [2022-12-13 18:53:20,486 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 118 transitions, 242 flow [2022-12-13 18:53:20,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 118 transitions, 242 flow [2022-12-13 18:53:20,505 INFO L130 PetriNetUnfolder]: 7/118 cut-off events. [2022-12-13 18:53:20,505 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:53:20,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 118 events. 7/118 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 150 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2022-12-13 18:53:20,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 3978 [2022-12-13 18:53:23,094 INFO L134 LiptonReduction]: Checked pairs total: 3304 [2022-12-13 18:53:23,094 INFO L136 LiptonReduction]: Total number of compositions: 115 [2022-12-13 18:53:23,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:53:23,113 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;@442f96cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:53:23,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-12-13 18:53:23,116 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 18:53:23,116 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:53:23,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:23,117 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:53:23,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:23,121 INFO L85 PathProgramCache]: Analyzing trace with hash 14140798, now seen corresponding path program 1 times [2022-12-13 18:53:23,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:23,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636907754] [2022-12-13 18:53:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:23,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636907754] [2022-12-13 18:53:23,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636907754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:23,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:23,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:53:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226563140] [2022-12-13 18:53:23,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:23,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:53:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:53:23,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:53:23,385 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-12-13 18:53:23,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:23,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-12-13 18:53:23,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:23,525 INFO L130 PetriNetUnfolder]: 583/864 cut-off events. [2022-12-13 18:53:23,525 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 18:53:23,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 864 events. 583/864 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3544 event pairs, 92 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 1740. Up to 727 conditions per place. [2022-12-13 18:53:23,533 INFO L137 encePairwiseOnDemand]: 223/235 looper letters, 33 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2022-12-13 18:53:23,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 161 flow [2022-12-13 18:53:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:53:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:53:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-12-13 18:53:23,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2022-12-13 18:53:23,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-12-13 18:53:23,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-12-13 18:53:23,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:23,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-12-13 18:53:23,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,559 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 56 flow. Second operand 3 states and 363 transitions. [2022-12-13 18:53:23,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 161 flow [2022-12-13 18:53:23,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:53:23,563 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 87 flow [2022-12-13 18:53:23,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2022-12-13 18:53:23,568 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2022-12-13 18:53:23,568 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 87 flow [2022-12-13 18:53:23,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:23,569 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:53:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:53:23,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:23,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 14140849, now seen corresponding path program 1 times [2022-12-13 18:53:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:23,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991023849] [2022-12-13 18:53:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:23,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:23,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:23,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991023849] [2022-12-13 18:53:23,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991023849] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:23,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:23,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:53:23,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274353654] [2022-12-13 18:53:23,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:23,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:53:23,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:23,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:53:23,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:53:23,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-12-13 18:53:23,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:23,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-12-13 18:53:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:23,751 INFO L130 PetriNetUnfolder]: 699/1050 cut-off events. [2022-12-13 18:53:23,751 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-13 18:53:23,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2667 conditions, 1050 events. 699/1050 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 4638 event pairs, 277 based on Foata normal form. 50/528 useless extension candidates. Maximal degree in co-relation 2656. Up to 611 conditions per place. [2022-12-13 18:53:23,756 INFO L137 encePairwiseOnDemand]: 231/235 looper letters, 39 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2022-12-13 18:53:23,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 216 flow [2022-12-13 18:53:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:53:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:53:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2022-12-13 18:53:23,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5049645390070922 [2022-12-13 18:53:23,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2022-12-13 18:53:23,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2022-12-13 18:53:23,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:23,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2022-12-13 18:53:23,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,761 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 87 flow. Second operand 3 states and 356 transitions. [2022-12-13 18:53:23,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 216 flow [2022-12-13 18:53:23,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:23,762 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 97 flow [2022-12-13 18:53:23,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2022-12-13 18:53:23,763 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2022-12-13 18:53:23,763 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 97 flow [2022-12-13 18:53:23,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:23,763 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:53:23,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:53:23,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash 438366704, now seen corresponding path program 1 times [2022-12-13 18:53:23,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:23,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066108440] [2022-12-13 18:53:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:23,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066108440] [2022-12-13 18:53:23,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066108440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:23,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:23,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:53:23,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613188148] [2022-12-13 18:53:23,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:53:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:23,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:53:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:53:23,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-12-13 18:53:23,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:23,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-12-13 18:53:23,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:23,871 INFO L130 PetriNetUnfolder]: 625/938 cut-off events. [2022-12-13 18:53:23,871 INFO L131 PetriNetUnfolder]: For 256/256 co-relation queries the response was YES. [2022-12-13 18:53:23,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 938 events. 625/938 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 3853 event pairs, 435 based on Foata normal form. 0/514 useless extension candidates. Maximal degree in co-relation 2500. Up to 938 conditions per place. [2022-12-13 18:53:23,875 INFO L137 encePairwiseOnDemand]: 233/235 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2022-12-13 18:53:23,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 141 flow [2022-12-13 18:53:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:53:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:53:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2022-12-13 18:53:23,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47801418439716314 [2022-12-13 18:53:23,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 337 transitions. [2022-12-13 18:53:23,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 337 transitions. [2022-12-13 18:53:23,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:23,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 337 transitions. [2022-12-13 18:53:23,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,879 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 97 flow. Second operand 3 states and 337 transitions. [2022-12-13 18:53:23,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 141 flow [2022-12-13 18:53:23,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:23,880 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 90 flow [2022-12-13 18:53:23,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2022-12-13 18:53:23,881 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2022-12-13 18:53:23,881 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 90 flow [2022-12-13 18:53:23,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:23,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:23,881 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:53:23,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:53:23,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:23,882 INFO L85 PathProgramCache]: Analyzing trace with hash 438366653, now seen corresponding path program 1 times [2022-12-13 18:53:23,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:23,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445518447] [2022-12-13 18:53:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:23,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:23,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445518447] [2022-12-13 18:53:23,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445518447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36265768] [2022-12-13 18:53:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:23,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:23,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:23,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:23,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:53:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:23,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:53:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:24,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:53:24,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36265768] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:24,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:53:24,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-12-13 18:53:24,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209346523] [2022-12-13 18:53:24,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:24,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:53:24,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:53:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:53:24,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 235 [2022-12-13 18:53:24,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:24,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 235 [2022-12-13 18:53:24,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:24,184 INFO L130 PetriNetUnfolder]: 563/844 cut-off events. [2022-12-13 18:53:24,184 INFO L131 PetriNetUnfolder]: For 228/228 co-relation queries the response was YES. [2022-12-13 18:53:24,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 844 events. 563/844 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3482 event pairs, 207 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 2220. Up to 530 conditions per place. [2022-12-13 18:53:24,188 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 33 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2022-12-13 18:53:24,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 208 flow [2022-12-13 18:53:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:53:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:53:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2022-12-13 18:53:24,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48404255319148937 [2022-12-13 18:53:24,190 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2022-12-13 18:53:24,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2022-12-13 18:53:24,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:24,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2022-12-13 18:53:24,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,194 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,194 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 90 flow. Second operand 4 states and 455 transitions. [2022-12-13 18:53:24,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 208 flow [2022-12-13 18:53:24,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:24,195 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 124 flow [2022-12-13 18:53:24,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-13 18:53:24,196 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-12-13 18:53:24,196 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 124 flow [2022-12-13 18:53:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:24,197 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:53:24,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:53:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:24,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 438366654, now seen corresponding path program 1 times [2022-12-13 18:53:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48972209] [2022-12-13 18:53:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:24,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:24,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48972209] [2022-12-13 18:53:24,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48972209] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:24,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980740253] [2022-12-13 18:53:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:24,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:24,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:24,462 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:24,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:53:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:24,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:53:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:24,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:24,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980740253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:24,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:24,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 18:53:24,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663757512] [2022-12-13 18:53:24,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:24,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:53:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:53:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:53:24,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:24,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 124 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:24,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:24,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:24,797 INFO L130 PetriNetUnfolder]: 983/1468 cut-off events. [2022-12-13 18:53:24,797 INFO L131 PetriNetUnfolder]: For 948/948 co-relation queries the response was YES. [2022-12-13 18:53:24,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4543 conditions, 1468 events. 983/1468 cut-off events. For 948/948 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6526 event pairs, 75 based on Foata normal form. 162/1196 useless extension candidates. Maximal degree in co-relation 4530. Up to 837 conditions per place. [2022-12-13 18:53:24,804 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 67 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2022-12-13 18:53:24,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 84 transitions, 500 flow [2022-12-13 18:53:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:53:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:53:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 700 transitions. [2022-12-13 18:53:24,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2022-12-13 18:53:24,806 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 700 transitions. [2022-12-13 18:53:24,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 700 transitions. [2022-12-13 18:53:24,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:24,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 700 transitions. [2022-12-13 18:53:24,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.66666666666667) internal successors, (700), 6 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,809 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,810 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 124 flow. Second operand 6 states and 700 transitions. [2022-12-13 18:53:24,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 84 transitions, 500 flow [2022-12-13 18:53:24,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 84 transitions, 499 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:24,812 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 309 flow [2022-12-13 18:53:24,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2022-12-13 18:53:24,812 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2022-12-13 18:53:24,813 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 309 flow [2022-12-13 18:53:24,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:24,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:24,813 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:53:24,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:53:25,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:25,014 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:25,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 706457306, now seen corresponding path program 1 times [2022-12-13 18:53:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:25,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81714943] [2022-12-13 18:53:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:25,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:25,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81714943] [2022-12-13 18:53:25,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81714943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:25,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:25,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:53:25,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971348497] [2022-12-13 18:53:25,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:25,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:53:25,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:53:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:53:25,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-12-13 18:53:25,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:25,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-12-13 18:53:25,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:25,245 INFO L130 PetriNetUnfolder]: 1463/2179 cut-off events. [2022-12-13 18:53:25,245 INFO L131 PetriNetUnfolder]: For 6251/6251 co-relation queries the response was YES. [2022-12-13 18:53:25,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 2179 events. 1463/2179 cut-off events. For 6251/6251 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10516 event pairs, 388 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 8323. Up to 1263 conditions per place. [2022-12-13 18:53:25,255 INFO L137 encePairwiseOnDemand]: 231/235 looper letters, 69 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2022-12-13 18:53:25,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 71 transitions, 733 flow [2022-12-13 18:53:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:53:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:53:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2022-12-13 18:53:25,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49361702127659574 [2022-12-13 18:53:25,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2022-12-13 18:53:25,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2022-12-13 18:53:25,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:25,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2022-12-13 18:53:25,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,259 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 309 flow. Second operand 3 states and 348 transitions. [2022-12-13 18:53:25,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 71 transitions, 733 flow [2022-12-13 18:53:25,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 71 transitions, 666 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:25,266 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 289 flow [2022-12-13 18:53:25,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2022-12-13 18:53:25,266 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2022-12-13 18:53:25,266 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 289 flow [2022-12-13 18:53:25,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:25,267 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:53:25,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:53:25,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:25,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 706457209, now seen corresponding path program 1 times [2022-12-13 18:53:25,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:25,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828572978] [2022-12-13 18:53:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:25,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:25,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828572978] [2022-12-13 18:53:25,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828572978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:25,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:25,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:53:25,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407516199] [2022-12-13 18:53:25,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:25,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:53:25,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:25,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:53:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:53:25,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:25,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:25,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:25,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:25,526 INFO L130 PetriNetUnfolder]: 1303/1942 cut-off events. [2022-12-13 18:53:25,527 INFO L131 PetriNetUnfolder]: For 4548/4548 co-relation queries the response was YES. [2022-12-13 18:53:25,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7468 conditions, 1942 events. 1303/1942 cut-off events. For 4548/4548 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9160 event pairs, 388 based on Foata normal form. 0/1543 useless extension candidates. Maximal degree in co-relation 7449. Up to 1026 conditions per place. [2022-12-13 18:53:25,542 INFO L137 encePairwiseOnDemand]: 231/235 looper letters, 67 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2022-12-13 18:53:25,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 674 flow [2022-12-13 18:53:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:53:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:53:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2022-12-13 18:53:25,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2022-12-13 18:53:25,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2022-12-13 18:53:25,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2022-12-13 18:53:25,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:25,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2022-12-13 18:53:25,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,547 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 289 flow. Second operand 3 states and 340 transitions. [2022-12-13 18:53:25,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 674 flow [2022-12-13 18:53:25,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 70 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:25,553 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 305 flow [2022-12-13 18:53:25,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2022-12-13 18:53:25,554 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2022-12-13 18:53:25,554 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 305 flow [2022-12-13 18:53:25,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:25,555 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:53:25,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 18:53:25,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:25,555 INFO L85 PathProgramCache]: Analyzing trace with hash 706457277, now seen corresponding path program 1 times [2022-12-13 18:53:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:25,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475361492] [2022-12-13 18:53:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:25,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:25,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:25,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475361492] [2022-12-13 18:53:25,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475361492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:25,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:25,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:53:25,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918618437] [2022-12-13 18:53:25,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:25,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:53:25,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:25,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:53:25,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:53:25,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:25,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:25,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:25,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:25,743 INFO L130 PetriNetUnfolder]: 1143/1705 cut-off events. [2022-12-13 18:53:25,743 INFO L131 PetriNetUnfolder]: For 4603/4603 co-relation queries the response was YES. [2022-12-13 18:53:25,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6917 conditions, 1705 events. 1143/1705 cut-off events. For 4603/4603 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7866 event pairs, 277 based on Foata normal form. 77/1481 useless extension candidates. Maximal degree in co-relation 6895. Up to 1026 conditions per place. [2022-12-13 18:53:25,753 INFO L137 encePairwiseOnDemand]: 231/235 looper letters, 66 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2022-12-13 18:53:25,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 682 flow [2022-12-13 18:53:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:53:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:53:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2022-12-13 18:53:25,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2022-12-13 18:53:25,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2022-12-13 18:53:25,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2022-12-13 18:53:25,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:25,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2022-12-13 18:53:25,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,757 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 305 flow. Second operand 3 states and 339 transitions. [2022-12-13 18:53:25,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 682 flow [2022-12-13 18:53:25,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 673 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:53:25,761 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 298 flow [2022-12-13 18:53:25,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2022-12-13 18:53:25,762 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2022-12-13 18:53:25,762 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 298 flow [2022-12-13 18:53:25,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:25,762 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:53:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:53:25,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 706455305, now seen corresponding path program 1 times [2022-12-13 18:53:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:25,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479503793] [2022-12-13 18:53:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:25,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:25,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479503793] [2022-12-13 18:53:25,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479503793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:25,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:25,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:53:25,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688151489] [2022-12-13 18:53:25,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:25,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:53:25,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:53:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:53:25,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-12-13 18:53:25,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:25,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-12-13 18:53:25,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:25,943 INFO L130 PetriNetUnfolder]: 1087/1621 cut-off events. [2022-12-13 18:53:25,943 INFO L131 PetriNetUnfolder]: For 3332/3332 co-relation queries the response was YES. [2022-12-13 18:53:25,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6674 conditions, 1621 events. 1087/1621 cut-off events. For 3332/3332 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6952 event pairs, 332 based on Foata normal form. 77/1447 useless extension candidates. Maximal degree in co-relation 6653. Up to 1128 conditions per place. [2022-12-13 18:53:25,952 INFO L137 encePairwiseOnDemand]: 231/235 looper letters, 46 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2022-12-13 18:53:25,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 469 flow [2022-12-13 18:53:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:53:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:53:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2022-12-13 18:53:25,954 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49361702127659574 [2022-12-13 18:53:25,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2022-12-13 18:53:25,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2022-12-13 18:53:25,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:25,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2022-12-13 18:53:25,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,956 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 298 flow. Second operand 3 states and 348 transitions. [2022-12-13 18:53:25,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 469 flow [2022-12-13 18:53:25,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:25,960 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 317 flow [2022-12-13 18:53:25,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2022-12-13 18:53:25,961 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2022-12-13 18:53:25,961 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 317 flow [2022-12-13 18:53:25,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:25,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:25,961 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:25,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 18:53:25,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:25,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:25,962 INFO L85 PathProgramCache]: Analyzing trace with hash 425340463, now seen corresponding path program 1 times [2022-12-13 18:53:25,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:25,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133814986] [2022-12-13 18:53:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:25,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:25,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133814986] [2022-12-13 18:53:25,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133814986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973802759] [2022-12-13 18:53:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:25,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:25,995 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:26,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:53:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:53:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:26,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:53:26,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973802759] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:26,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:53:26,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 18:53:26,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614954397] [2022-12-13 18:53:26,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:26,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:53:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:53:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:53:26,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-12-13 18:53:26,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:26,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:26,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-12-13 18:53:26,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:26,232 INFO L130 PetriNetUnfolder]: 935/1396 cut-off events. [2022-12-13 18:53:26,232 INFO L131 PetriNetUnfolder]: For 4448/4448 co-relation queries the response was YES. [2022-12-13 18:53:26,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 1396 events. 935/1396 cut-off events. For 4448/4448 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6221 event pairs, 162 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 5946. Up to 973 conditions per place. [2022-12-13 18:53:26,242 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 64 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-12-13 18:53:26,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 66 transitions, 707 flow [2022-12-13 18:53:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:53:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:53:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2022-12-13 18:53:26,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4776595744680851 [2022-12-13 18:53:26,244 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2022-12-13 18:53:26,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2022-12-13 18:53:26,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:26,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2022-12-13 18:53:26,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:26,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:26,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:26,248 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 317 flow. Second operand 4 states and 449 transitions. [2022-12-13 18:53:26,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 66 transitions, 707 flow [2022-12-13 18:53:26,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:26,253 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 311 flow [2022-12-13 18:53:26,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2022-12-13 18:53:26,253 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2022-12-13 18:53:26,253 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 311 flow [2022-12-13 18:53:26,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:26,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:26,254 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:26,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:53:26,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:53:26,454 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 425340434, now seen corresponding path program 1 times [2022-12-13 18:53:26,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:26,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375140470] [2022-12-13 18:53:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:26,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:26,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:26,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375140470] [2022-12-13 18:53:26,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375140470] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:26,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87570019] [2022-12-13 18:53:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:26,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:26,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:26,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:26,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:53:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:53:26,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:26,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:26,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87570019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:26,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:26,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 18:53:26,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993808215] [2022-12-13 18:53:26,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:26,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:53:26,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:53:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:53:26,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 235 [2022-12-13 18:53:26,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 104.625) internal successors, (837), 8 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:26,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:26,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 235 [2022-12-13 18:53:26,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:27,068 INFO L130 PetriNetUnfolder]: 2224/3269 cut-off events. [2022-12-13 18:53:27,068 INFO L131 PetriNetUnfolder]: For 11767/11767 co-relation queries the response was YES. [2022-12-13 18:53:27,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13812 conditions, 3269 events. 2224/3269 cut-off events. For 11767/11767 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15788 event pairs, 162 based on Foata normal form. 219/2986 useless extension candidates. Maximal degree in co-relation 13788. Up to 945 conditions per place. [2022-12-13 18:53:27,081 INFO L137 encePairwiseOnDemand]: 231/235 looper letters, 234 selfloop transitions, 9 changer transitions 0/243 dead transitions. [2022-12-13 18:53:27,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 243 transitions, 2635 flow [2022-12-13 18:53:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:53:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:53:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1012 transitions. [2022-12-13 18:53:27,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47848699763593383 [2022-12-13 18:53:27,084 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1012 transitions. [2022-12-13 18:53:27,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1012 transitions. [2022-12-13 18:53:27,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:27,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1012 transitions. [2022-12-13 18:53:27,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,088 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,088 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 311 flow. Second operand 9 states and 1012 transitions. [2022-12-13 18:53:27,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 243 transitions, 2635 flow [2022-12-13 18:53:27,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 243 transitions, 2632 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:53:27,094 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 370 flow [2022-12-13 18:53:27,094 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2022-12-13 18:53:27,095 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2022-12-13 18:53:27,095 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 370 flow [2022-12-13 18:53:27,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.625) internal successors, (837), 8 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:27,095 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:27,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:53:27,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 18:53:27,296 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:27,297 INFO L85 PathProgramCache]: Analyzing trace with hash 425340366, now seen corresponding path program 1 times [2022-12-13 18:53:27,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:27,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569884374] [2022-12-13 18:53:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:27,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:27,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:27,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569884374] [2022-12-13 18:53:27,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569884374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:27,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329974129] [2022-12-13 18:53:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:27,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:27,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:27,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:27,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:53:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:27,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:53:27,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:27,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:53:27,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329974129] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:27,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:53:27,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-12-13 18:53:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144611787] [2022-12-13 18:53:27,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:27,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:53:27,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:53:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:53:27,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-12-13 18:53:27,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:27,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-12-13 18:53:27,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:27,775 INFO L130 PetriNetUnfolder]: 1695/2521 cut-off events. [2022-12-13 18:53:27,775 INFO L131 PetriNetUnfolder]: For 9589/9589 co-relation queries the response was YES. [2022-12-13 18:53:27,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11543 conditions, 2521 events. 1695/2521 cut-off events. For 9589/9589 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11934 event pairs, 162 based on Foata normal form. 292/2648 useless extension candidates. Maximal degree in co-relation 11516. Up to 2098 conditions per place. [2022-12-13 18:53:27,787 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 66 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2022-12-13 18:53:27,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 732 flow [2022-12-13 18:53:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:53:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:53:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 448 transitions. [2022-12-13 18:53:27,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4765957446808511 [2022-12-13 18:53:27,789 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 448 transitions. [2022-12-13 18:53:27,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 448 transitions. [2022-12-13 18:53:27,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:27,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 448 transitions. [2022-12-13 18:53:27,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,793 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 370 flow. Second operand 4 states and 448 transitions. [2022-12-13 18:53:27,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 732 flow [2022-12-13 18:53:27,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 728 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:53:27,801 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 339 flow [2022-12-13 18:53:27,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2022-12-13 18:53:27,802 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2022-12-13 18:53:27,802 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 339 flow [2022-12-13 18:53:27,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:27,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:27,803 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:27,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:53:28,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 18:53:28,004 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:28,004 INFO L85 PathProgramCache]: Analyzing trace with hash 425278415, now seen corresponding path program 1 times [2022-12-13 18:53:28,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:28,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316680351] [2022-12-13 18:53:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:28,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:28,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316680351] [2022-12-13 18:53:28,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316680351] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:28,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:28,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:53:28,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872862739] [2022-12-13 18:53:28,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:28,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:53:28,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:53:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:53:28,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-12-13 18:53:28,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:28,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:28,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-12-13 18:53:28,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:28,201 INFO L130 PetriNetUnfolder]: 1431/2158 cut-off events. [2022-12-13 18:53:28,201 INFO L131 PetriNetUnfolder]: For 7821/7821 co-relation queries the response was YES. [2022-12-13 18:53:28,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9697 conditions, 2158 events. 1431/2158 cut-off events. For 7821/7821 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9802 event pairs, 1013 based on Foata normal form. 0/2158 useless extension candidates. Maximal degree in co-relation 9670. Up to 2158 conditions per place. [2022-12-13 18:53:28,208 INFO L137 encePairwiseOnDemand]: 233/235 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2022-12-13 18:53:28,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 36 transitions, 373 flow [2022-12-13 18:53:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:53:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:53:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2022-12-13 18:53:28,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47092198581560285 [2022-12-13 18:53:28,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2022-12-13 18:53:28,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2022-12-13 18:53:28,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:28,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2022-12-13 18:53:28,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:28,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:28,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:28,211 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 339 flow. Second operand 3 states and 332 transitions. [2022-12-13 18:53:28,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 36 transitions, 373 flow [2022-12-13 18:53:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 36 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:53:28,216 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 300 flow [2022-12-13 18:53:28,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2022-12-13 18:53:28,216 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2022-12-13 18:53:28,217 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 300 flow [2022-12-13 18:53:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:28,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:28,217 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 18:53:28,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 18:53:28,217 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1612686017, now seen corresponding path program 2 times [2022-12-13 18:53:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:28,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916505901] [2022-12-13 18:53:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:28,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:28,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916505901] [2022-12-13 18:53:28,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916505901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873645419] [2022-12-13 18:53:28,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:53:28,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:28,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:28,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:28,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:53:28,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:53:28,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:53:28,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 18:53:28,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:28,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:28,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873645419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:28,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:28,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 18:53:28,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868519111] [2022-12-13 18:53:28,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:28,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:53:28,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:28,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:53:28,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:53:28,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:28,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 300 flow. Second operand has 17 states, 17 states have (on average 104.41176470588235) internal successors, (1775), 17 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:28,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:28,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:29,081 INFO L130 PetriNetUnfolder]: 2423/3658 cut-off events. [2022-12-13 18:53:29,081 INFO L131 PetriNetUnfolder]: For 12728/12728 co-relation queries the response was YES. [2022-12-13 18:53:29,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16301 conditions, 3658 events. 2423/3658 cut-off events. For 12728/12728 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17869 event pairs, 175 based on Foata normal form. 496/4154 useless extension candidates. Maximal degree in co-relation 16274. Up to 1533 conditions per place. [2022-12-13 18:53:29,094 INFO L137 encePairwiseOnDemand]: 230/235 looper letters, 149 selfloop transitions, 32 changer transitions 0/181 dead transitions. [2022-12-13 18:53:29,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 181 transitions, 1539 flow [2022-12-13 18:53:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:53:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:53:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1370 transitions. [2022-12-13 18:53:29,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4858156028368794 [2022-12-13 18:53:29,097 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1370 transitions. [2022-12-13 18:53:29,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1370 transitions. [2022-12-13 18:53:29,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:29,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1370 transitions. [2022-12-13 18:53:29,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 114.16666666666667) internal successors, (1370), 12 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:29,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 235.0) internal successors, (3055), 13 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:29,102 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 235.0) internal successors, (3055), 13 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:29,102 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 300 flow. Second operand 12 states and 1370 transitions. [2022-12-13 18:53:29,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 181 transitions, 1539 flow [2022-12-13 18:53:29,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 181 transitions, 1538 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:53:29,110 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 642 flow [2022-12-13 18:53:29,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=642, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2022-12-13 18:53:29,111 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2022-12-13 18:53:29,111 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 642 flow [2022-12-13 18:53:29,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 104.41176470588235) internal successors, (1775), 17 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:29,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:29,111 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:29,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:53:29,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:29,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:29,314 INFO L85 PathProgramCache]: Analyzing trace with hash 298729377, now seen corresponding path program 1 times [2022-12-13 18:53:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:29,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196340041] [2022-12-13 18:53:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:29,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196340041] [2022-12-13 18:53:29,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196340041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225688856] [2022-12-13 18:53:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:29,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:29,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:29,380 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:29,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:53:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:53:29,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:29,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:29,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225688856] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:29,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:29,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-13 18:53:29,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984138380] [2022-12-13 18:53:29,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:53:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:29,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:53:29,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:53:29,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:29,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 642 flow. Second operand has 11 states, 11 states have (on average 105.18181818181819) internal successors, (1157), 11 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:29,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:29,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:29,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:30,097 INFO L130 PetriNetUnfolder]: 3127/4714 cut-off events. [2022-12-13 18:53:30,097 INFO L131 PetriNetUnfolder]: For 32393/32393 co-relation queries the response was YES. [2022-12-13 18:53:30,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24427 conditions, 4714 events. 3127/4714 cut-off events. For 32393/32393 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24646 event pairs, 230 based on Foata normal form. 308/5022 useless extension candidates. Maximal degree in co-relation 24393. Up to 3357 conditions per place. [2022-12-13 18:53:30,118 INFO L137 encePairwiseOnDemand]: 230/235 looper letters, 115 selfloop transitions, 23 changer transitions 0/138 dead transitions. [2022-12-13 18:53:30,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 138 transitions, 1473 flow [2022-12-13 18:53:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:53:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:53:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 904 transitions. [2022-12-13 18:53:30,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2022-12-13 18:53:30,120 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 904 transitions. [2022-12-13 18:53:30,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 904 transitions. [2022-12-13 18:53:30,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:30,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 904 transitions. [2022-12-13 18:53:30,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.0) internal successors, (904), 8 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:30,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 235.0) internal successors, (2115), 9 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:30,126 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 235.0) internal successors, (2115), 9 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:30,126 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 642 flow. Second operand 8 states and 904 transitions. [2022-12-13 18:53:30,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 138 transitions, 1473 flow [2022-12-13 18:53:30,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 138 transitions, 1387 flow, removed 40 selfloop flow, removed 2 redundant places. [2022-12-13 18:53:30,175 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 838 flow [2022-12-13 18:53:30,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2022-12-13 18:53:30,176 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2022-12-13 18:53:30,176 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 838 flow [2022-12-13 18:53:30,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.18181818181819) internal successors, (1157), 11 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:30,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:30,177 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:30,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:53:30,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:30,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:30,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1164663805, now seen corresponding path program 2 times [2022-12-13 18:53:30,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:30,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64993350] [2022-12-13 18:53:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:30,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:30,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:30,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64993350] [2022-12-13 18:53:30,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64993350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:30,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378512852] [2022-12-13 18:53:30,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:53:30,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:30,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:30,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:53:30,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:53:30,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:53:30,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:53:30,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:30,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:30,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378512852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:30,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:30,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 18:53:30,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994049036] [2022-12-13 18:53:30,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:30,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:53:30,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:30,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:53:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:53:30,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 235 [2022-12-13 18:53:30,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 838 flow. Second operand has 17 states, 17 states have (on average 102.76470588235294) internal successors, (1747), 17 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:30,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:30,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 235 [2022-12-13 18:53:30,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:32,070 INFO L130 PetriNetUnfolder]: 6487/9754 cut-off events. [2022-12-13 18:53:32,070 INFO L131 PetriNetUnfolder]: For 110723/110723 co-relation queries the response was YES. [2022-12-13 18:53:32,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51877 conditions, 9754 events. 6487/9754 cut-off events. For 110723/110723 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 53573 event pairs, 325 based on Foata normal form. 840/10594 useless extension candidates. Maximal degree in co-relation 51838. Up to 2941 conditions per place. [2022-12-13 18:53:32,113 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 654 selfloop transitions, 11 changer transitions 0/665 dead transitions. [2022-12-13 18:53:32,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 665 transitions, 9790 flow [2022-12-13 18:53:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:53:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:53:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1333 transitions. [2022-12-13 18:53:32,115 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4726950354609929 [2022-12-13 18:53:32,116 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1333 transitions. [2022-12-13 18:53:32,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1333 transitions. [2022-12-13 18:53:32,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:32,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1333 transitions. [2022-12-13 18:53:32,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 111.08333333333333) internal successors, (1333), 12 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) [2022-12-13 18:53:32,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 235.0) internal successors, (3055), 13 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:32,122 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 235.0) internal successors, (3055), 13 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:32,122 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 838 flow. Second operand 12 states and 1333 transitions. [2022-12-13 18:53:32,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 665 transitions, 9790 flow [2022-12-13 18:53:32,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 665 transitions, 9074 flow, removed 330 selfloop flow, removed 2 redundant places. [2022-12-13 18:53:32,191 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 856 flow [2022-12-13 18:53:32,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=856, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2022-12-13 18:53:32,191 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2022-12-13 18:53:32,191 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 856 flow [2022-12-13 18:53:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 102.76470588235294) internal successors, (1747), 17 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:32,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:32,192 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:32,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:53:32,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 18:53:32,394 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:32,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1588219877, now seen corresponding path program 1 times [2022-12-13 18:53:32,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:32,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121776276] [2022-12-13 18:53:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:32,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:32,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:32,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121776276] [2022-12-13 18:53:32,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121776276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:32,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887094076] [2022-12-13 18:53:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:32,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:32,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:32,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:32,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:53:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:32,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 18:53:32,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:32,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:32,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887094076] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:32,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:32,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 18:53:32,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384493071] [2022-12-13 18:53:32,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:32,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:53:32,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:53:32,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:53:32,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:32,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 856 flow. Second operand has 17 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:32,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:32,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:32,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:34,609 INFO L130 PetriNetUnfolder]: 9719/14783 cut-off events. [2022-12-13 18:53:34,609 INFO L131 PetriNetUnfolder]: For 148597/148597 co-relation queries the response was YES. [2022-12-13 18:53:34,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79136 conditions, 14783 events. 9719/14783 cut-off events. For 148597/148597 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 91739 event pairs, 344 based on Foata normal form. 658/15441 useless extension candidates. Maximal degree in co-relation 79091. Up to 5519 conditions per place. [2022-12-13 18:53:34,684 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 256 selfloop transitions, 74 changer transitions 0/330 dead transitions. [2022-12-13 18:53:34,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 330 transitions, 3782 flow [2022-12-13 18:53:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:53:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 18:53:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1695 transitions. [2022-12-13 18:53:34,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2022-12-13 18:53:34,689 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1695 transitions. [2022-12-13 18:53:34,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1695 transitions. [2022-12-13 18:53:34,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:34,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1695 transitions. [2022-12-13 18:53:34,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 113.0) internal successors, (1695), 15 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:34,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 235.0) internal successors, (3760), 16 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:34,699 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 235.0) internal successors, (3760), 16 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:34,699 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 856 flow. Second operand 15 states and 1695 transitions. [2022-12-13 18:53:34,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 330 transitions, 3782 flow [2022-12-13 18:53:34,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 330 transitions, 3494 flow, removed 91 selfloop flow, removed 5 redundant places. [2022-12-13 18:53:34,982 INFO L231 Difference]: Finished difference. Result has 106 places, 115 transitions, 1580 flow [2022-12-13 18:53:34,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1580, PETRI_PLACES=106, PETRI_TRANSITIONS=115} [2022-12-13 18:53:34,982 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2022-12-13 18:53:34,982 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 115 transitions, 1580 flow [2022-12-13 18:53:34,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:34,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:34,983 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:34,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:53:35,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 18:53:35,184 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1282689847, now seen corresponding path program 2 times [2022-12-13 18:53:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593217570] [2022-12-13 18:53:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:35,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:35,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593217570] [2022-12-13 18:53:35,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593217570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:35,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933324324] [2022-12-13 18:53:35,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:53:35,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:35,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:35,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:35,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:53:35,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:53:35,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:53:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 18:53:35,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:35,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:35,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933324324] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:35,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:35,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 18:53:35,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62025861] [2022-12-13 18:53:35,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:35,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:53:35,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:53:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:53:35,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:35,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 115 transitions, 1580 flow. Second operand has 17 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:35,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:35,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:35,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:38,355 INFO L130 PetriNetUnfolder]: 14457/22088 cut-off events. [2022-12-13 18:53:38,355 INFO L131 PetriNetUnfolder]: For 313145/313145 co-relation queries the response was YES. [2022-12-13 18:53:38,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132858 conditions, 22088 events. 14457/22088 cut-off events. For 313145/313145 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 148077 event pairs, 655 based on Foata normal form. 727/22815 useless extension candidates. Maximal degree in co-relation 132806. Up to 9426 conditions per place. [2022-12-13 18:53:38,501 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 329 selfloop transitions, 108 changer transitions 0/437 dead transitions. [2022-12-13 18:53:38,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 437 transitions, 5353 flow [2022-12-13 18:53:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 18:53:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 18:53:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2023 transitions. [2022-12-13 18:53:38,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4782505910165485 [2022-12-13 18:53:38,505 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2023 transitions. [2022-12-13 18:53:38,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2023 transitions. [2022-12-13 18:53:38,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:38,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2023 transitions. [2022-12-13 18:53:38,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.38888888888889) internal successors, (2023), 18 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:38,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:38,514 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:38,514 INFO L175 Difference]: Start difference. First operand has 106 places, 115 transitions, 1580 flow. Second operand 18 states and 2023 transitions. [2022-12-13 18:53:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 437 transitions, 5353 flow [2022-12-13 18:53:40,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 437 transitions, 5087 flow, removed 124 selfloop flow, removed 6 redundant places. [2022-12-13 18:53:40,039 INFO L231 Difference]: Finished difference. Result has 124 places, 177 transitions, 2674 flow [2022-12-13 18:53:40,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2674, PETRI_PLACES=124, PETRI_TRANSITIONS=177} [2022-12-13 18:53:40,039 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2022-12-13 18:53:40,039 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 177 transitions, 2674 flow [2022-12-13 18:53:40,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:40,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:40,040 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:40,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:53:40,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 18:53:40,241 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1104063780, now seen corresponding path program 1 times [2022-12-13 18:53:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:40,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754073409] [2022-12-13 18:53:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:40,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:40,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:40,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754073409] [2022-12-13 18:53:40,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754073409] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:40,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091597244] [2022-12-13 18:53:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:40,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:40,335 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:40,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:53:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:40,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:53:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:40,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:40,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091597244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:40,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:40,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 18:53:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70400643] [2022-12-13 18:53:40,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:40,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:53:40,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:40,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:53:40,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:53:40,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:40,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 177 transitions, 2674 flow. Second operand has 20 states, 20 states have (on average 104.8) internal successors, (2096), 20 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:40,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:40,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:40,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:45,066 INFO L130 PetriNetUnfolder]: 19869/30502 cut-off events. [2022-12-13 18:53:45,066 INFO L131 PetriNetUnfolder]: For 618169/618169 co-relation queries the response was YES. [2022-12-13 18:53:45,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197462 conditions, 30502 events. 19869/30502 cut-off events. For 618169/618169 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 215934 event pairs, 1292 based on Foata normal form. 994/31496 useless extension candidates. Maximal degree in co-relation 197404. Up to 12100 conditions per place. [2022-12-13 18:53:45,313 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 338 selfloop transitions, 153 changer transitions 0/491 dead transitions. [2022-12-13 18:53:45,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 491 transitions, 6576 flow [2022-12-13 18:53:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 18:53:45,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 18:53:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1920 transitions. [2022-12-13 18:53:45,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4806007509386733 [2022-12-13 18:53:45,316 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1920 transitions. [2022-12-13 18:53:45,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1920 transitions. [2022-12-13 18:53:45,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:45,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1920 transitions. [2022-12-13 18:53:45,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 112.94117647058823) internal successors, (1920), 17 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:45,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 235.0) internal successors, (4230), 18 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:45,321 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 235.0) internal successors, (4230), 18 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:45,322 INFO L175 Difference]: Start difference. First operand has 124 places, 177 transitions, 2674 flow. Second operand 17 states and 1920 transitions. [2022-12-13 18:53:45,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 491 transitions, 6576 flow [2022-12-13 18:53:49,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 491 transitions, 6359 flow, removed 104 selfloop flow, removed 3 redundant places. [2022-12-13 18:53:49,470 INFO L231 Difference]: Finished difference. Result has 145 places, 239 transitions, 4096 flow [2022-12-13 18:53:49,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4096, PETRI_PLACES=145, PETRI_TRANSITIONS=239} [2022-12-13 18:53:49,470 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2022-12-13 18:53:49,470 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 239 transitions, 4096 flow [2022-12-13 18:53:49,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 104.8) internal successors, (2096), 20 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:49,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:49,471 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:49,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 18:53:49,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:49,672 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:53:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash 156401254, now seen corresponding path program 3 times [2022-12-13 18:53:49,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:49,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101677540] [2022-12-13 18:53:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:49,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101677540] [2022-12-13 18:53:49,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101677540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:53:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632598060] [2022-12-13 18:53:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:53:49,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:53:49,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:49,771 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:53:49,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:53:49,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:53:49,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:53:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:53:49,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:53:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:49,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:53:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:50,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632598060] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:50,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:50,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 18:53:50,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709694075] [2022-12-13 18:53:50,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:50,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:53:50,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:53:50,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:53:50,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:53:50,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 239 transitions, 4096 flow. Second operand has 23 states, 23 states have (on average 104.69565217391305) internal successors, (2408), 23 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:50,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:50,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:53:50,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:56,293 INFO L130 PetriNetUnfolder]: 23919/36725 cut-off events. [2022-12-13 18:53:56,293 INFO L131 PetriNetUnfolder]: For 1032887/1032887 co-relation queries the response was YES. [2022-12-13 18:53:56,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254626 conditions, 36725 events. 23919/36725 cut-off events. For 1032887/1032887 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 264911 event pairs, 1294 based on Foata normal form. 1141/37866 useless extension candidates. Maximal degree in co-relation 254559. Up to 11634 conditions per place. [2022-12-13 18:53:56,621 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 388 selfloop transitions, 237 changer transitions 0/625 dead transitions. [2022-12-13 18:53:56,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 625 transitions, 8961 flow [2022-12-13 18:53:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:53:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 18:53:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2372 transitions. [2022-12-13 18:53:56,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4806484295845998 [2022-12-13 18:53:56,624 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2372 transitions. [2022-12-13 18:53:56,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2372 transitions. [2022-12-13 18:53:56,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:56,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2372 transitions. [2022-12-13 18:53:56,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 112.95238095238095) internal successors, (2372), 21 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:56,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 235.0) internal successors, (5170), 22 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:56,630 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 235.0) internal successors, (5170), 22 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:56,630 INFO L175 Difference]: Start difference. First operand has 145 places, 239 transitions, 4096 flow. Second operand 21 states and 2372 transitions. [2022-12-13 18:53:56,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 625 transitions, 8961 flow [2022-12-13 18:54:04,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 625 transitions, 8549 flow, removed 191 selfloop flow, removed 6 redundant places. [2022-12-13 18:54:04,178 INFO L231 Difference]: Finished difference. Result has 168 places, 302 transitions, 5707 flow [2022-12-13 18:54:04,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=3850, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5707, PETRI_PLACES=168, PETRI_TRANSITIONS=302} [2022-12-13 18:54:04,179 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 139 predicate places. [2022-12-13 18:54:04,179 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 302 transitions, 5707 flow [2022-12-13 18:54:04,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 104.69565217391305) internal successors, (2408), 23 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:04,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:04,180 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:04,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 18:54:04,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:04,381 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:54:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash 13260304, now seen corresponding path program 4 times [2022-12-13 18:54:04,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:04,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742194456] [2022-12-13 18:54:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:04,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:04,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742194456] [2022-12-13 18:54:04,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742194456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:04,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582586420] [2022-12-13 18:54:04,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:54:04,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:04,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:04,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:54:04,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:54:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:04,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:54:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:04,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:04,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582586420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:04,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:04,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 18:54:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609569683] [2022-12-13 18:54:04,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:04,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:54:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:54:04,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:54:04,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:54:04,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 302 transitions, 5707 flow. Second operand has 23 states, 23 states have (on average 104.69565217391305) internal successors, (2408), 23 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:04,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:04,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:54:04,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:13,174 INFO L130 PetriNetUnfolder]: 31863/48841 cut-off events. [2022-12-13 18:54:13,174 INFO L131 PetriNetUnfolder]: For 1515546/1515546 co-relation queries the response was YES. [2022-12-13 18:54:13,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355207 conditions, 48841 events. 31863/48841 cut-off events. For 1515546/1515546 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 366535 event pairs, 1435 based on Foata normal form. 1095/49936 useless extension candidates. Maximal degree in co-relation 355132. Up to 17825 conditions per place. [2022-12-13 18:54:13,654 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 521 selfloop transitions, 282 changer transitions 0/803 dead transitions. [2022-12-13 18:54:13,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 803 transitions, 12441 flow [2022-12-13 18:54:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 18:54:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 18:54:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2921 transitions. [2022-12-13 18:54:13,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47806873977086745 [2022-12-13 18:54:13,657 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2921 transitions. [2022-12-13 18:54:13,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2921 transitions. [2022-12-13 18:54:13,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:13,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2921 transitions. [2022-12-13 18:54:13,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 112.34615384615384) internal successors, (2921), 26 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:13,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 235.0) internal successors, (6345), 27 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:13,666 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 235.0) internal successors, (6345), 27 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:13,666 INFO L175 Difference]: Start difference. First operand has 168 places, 302 transitions, 5707 flow. Second operand 26 states and 2921 transitions. [2022-12-13 18:54:13,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 803 transitions, 12441 flow [2022-12-13 18:54:28,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 803 transitions, 11977 flow, removed 215 selfloop flow, removed 6 redundant places. [2022-12-13 18:54:28,132 INFO L231 Difference]: Finished difference. Result has 197 places, 405 transitions, 8186 flow [2022-12-13 18:54:28,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8186, PETRI_PLACES=197, PETRI_TRANSITIONS=405} [2022-12-13 18:54:28,133 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2022-12-13 18:54:28,133 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 405 transitions, 8186 flow [2022-12-13 18:54:28,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 104.69565217391305) internal successors, (2408), 23 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:28,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:28,134 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:28,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:28,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:28,334 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:54:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash 415693629, now seen corresponding path program 5 times [2022-12-13 18:54:28,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:28,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861055069] [2022-12-13 18:54:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:28,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:28,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861055069] [2022-12-13 18:54:28,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861055069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257967427] [2022-12-13 18:54:28,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:54:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:28,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:28,424 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:28,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:54:28,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 18:54:28,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:54:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:28,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:28,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257967427] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:28,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:28,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 18:54:28,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679795475] [2022-12-13 18:54:28,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:28,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 18:54:28,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 18:54:28,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2022-12-13 18:54:28,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:54:28,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 405 transitions, 8186 flow. Second operand has 26 states, 26 states have (on average 104.61538461538461) internal successors, (2720), 26 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:28,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:28,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:54:28,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:41,756 INFO L130 PetriNetUnfolder]: 42973/66222 cut-off events. [2022-12-13 18:54:41,756 INFO L131 PetriNetUnfolder]: For 2951756/2951756 co-relation queries the response was YES. [2022-12-13 18:54:42,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507088 conditions, 66222 events. 42973/66222 cut-off events. For 2951756/2951756 co-relation queries the response was YES. Maximal size of possible extension queue 2058. Compared 519186 event pairs, 3505 based on Foata normal form. 1561/67783 useless extension candidates. Maximal degree in co-relation 507003. Up to 29394 conditions per place. [2022-12-13 18:54:42,679 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 682 selfloop transitions, 360 changer transitions 0/1042 dead transitions. [2022-12-13 18:54:42,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1042 transitions, 17366 flow [2022-12-13 18:54:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 18:54:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 18:54:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3382 transitions. [2022-12-13 18:54:42,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4797163120567376 [2022-12-13 18:54:42,685 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3382 transitions. [2022-12-13 18:54:42,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3382 transitions. [2022-12-13 18:54:42,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:42,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3382 transitions. [2022-12-13 18:54:42,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 112.73333333333333) internal successors, (3382), 30 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:42,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 235.0) internal successors, (7285), 31 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:42,697 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 235.0) internal successors, (7285), 31 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:42,697 INFO L175 Difference]: Start difference. First operand has 197 places, 405 transitions, 8186 flow. Second operand 30 states and 3382 transitions. [2022-12-13 18:54:42,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1042 transitions, 17366 flow [2022-12-13 18:55:19,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 1042 transitions, 16760 flow, removed 288 selfloop flow, removed 6 redundant places. [2022-12-13 18:55:19,258 INFO L231 Difference]: Finished difference. Result has 230 places, 563 transitions, 12198 flow [2022-12-13 18:55:19,258 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=7808, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12198, PETRI_PLACES=230, PETRI_TRANSITIONS=563} [2022-12-13 18:55:19,259 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 201 predicate places. [2022-12-13 18:55:19,259 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 563 transitions, 12198 flow [2022-12-13 18:55:19,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.61538461538461) internal successors, (2720), 26 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:19,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:55:19,259 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:19,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:55:19,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:19,460 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:55:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash 143813186, now seen corresponding path program 6 times [2022-12-13 18:55:19,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:55:19,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790563234] [2022-12-13 18:55:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:19,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:55:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:55:19,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:55:19,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790563234] [2022-12-13 18:55:19,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790563234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:55:19,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463332145] [2022-12-13 18:55:19,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:55:19,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:19,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:55:19,564 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:55:19,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:55:19,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:55:19,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:55:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:55:19,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:55:19,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:55:19,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463332145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:19,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:55:19,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 18:55:19,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126386207] [2022-12-13 18:55:19,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:19,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 18:55:19,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:55:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 18:55:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2022-12-13 18:55:19,846 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:55:19,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 563 transitions, 12198 flow. Second operand has 26 states, 26 states have (on average 104.61538461538461) internal successors, (2720), 26 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:19,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:55:19,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:55:19,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:55:37,438 INFO L130 PetriNetUnfolder]: 49487/76251 cut-off events. [2022-12-13 18:55:37,439 INFO L131 PetriNetUnfolder]: For 3970120/3970120 co-relation queries the response was YES. [2022-12-13 18:55:38,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621059 conditions, 76251 events. 49487/76251 cut-off events. For 3970120/3970120 co-relation queries the response was YES. Maximal size of possible extension queue 2339. Compared 609463 event pairs, 4023 based on Foata normal form. 1293/77544 useless extension candidates. Maximal degree in co-relation 620963. Up to 33937 conditions per place. [2022-12-13 18:55:38,718 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 616 selfloop transitions, 394 changer transitions 0/1010 dead transitions. [2022-12-13 18:55:38,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1010 transitions, 19006 flow [2022-12-13 18:55:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 18:55:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 18:55:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2597 transitions. [2022-12-13 18:55:38,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4804810360777058 [2022-12-13 18:55:38,725 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2597 transitions. [2022-12-13 18:55:38,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2597 transitions. [2022-12-13 18:55:38,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:55:38,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2597 transitions. [2022-12-13 18:55:38,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 112.91304347826087) internal successors, (2597), 23 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:38,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 235.0) internal successors, (5640), 24 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:38,735 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 235.0) internal successors, (5640), 24 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:38,736 INFO L175 Difference]: Start difference. First operand has 230 places, 563 transitions, 12198 flow. Second operand 23 states and 2597 transitions. [2022-12-13 18:55:38,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1010 transitions, 19006 flow [2022-12-13 18:56:40,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1010 transitions, 18493 flow, removed 220 selfloop flow, removed 11 redundant places. [2022-12-13 18:56:40,078 INFO L231 Difference]: Finished difference. Result has 251 places, 643 transitions, 14902 flow [2022-12-13 18:56:40,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=11781, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14902, PETRI_PLACES=251, PETRI_TRANSITIONS=643} [2022-12-13 18:56:40,079 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 222 predicate places. [2022-12-13 18:56:40,079 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 643 transitions, 14902 flow [2022-12-13 18:56:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.61538461538461) internal successors, (2720), 26 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:40,079 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:40,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 18:56:40,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:40,280 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:56:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 286953978, now seen corresponding path program 2 times [2022-12-13 18:56:40,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:40,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554538259] [2022-12-13 18:56:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:40,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:40,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:40,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554538259] [2022-12-13 18:56:40,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554538259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:40,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196347571] [2022-12-13 18:56:40,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:56:40,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:40,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:40,381 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:40,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:56:40,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:56:40,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:40,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:56:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:40,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:40,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196347571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:40,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:56:40,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 18:56:40,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073197253] [2022-12-13 18:56:40,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:40,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 18:56:40,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 18:56:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2022-12-13 18:56:40,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:56:40,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 643 transitions, 14902 flow. Second operand has 26 states, 26 states have (on average 104.61538461538461) internal successors, (2720), 26 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:40,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:56:40,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:05,921 INFO L130 PetriNetUnfolder]: 64685/99692 cut-off events. [2022-12-13 18:57:05,921 INFO L131 PetriNetUnfolder]: For 5701185/5701185 co-relation queries the response was YES. [2022-12-13 18:57:06,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840758 conditions, 99692 events. 64685/99692 cut-off events. For 5701185/5701185 co-relation queries the response was YES. Maximal size of possible extension queue 3137. Compared 825426 event pairs, 5127 based on Foata normal form. 1302/100994 useless extension candidates. Maximal degree in co-relation 840651. Up to 39482 conditions per place. [2022-12-13 18:57:07,493 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 746 selfloop transitions, 571 changer transitions 0/1317 dead transitions. [2022-12-13 18:57:07,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1317 transitions, 26146 flow [2022-12-13 18:57:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 18:57:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 18:57:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3254 transitions. [2022-12-13 18:57:07,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47747615553925166 [2022-12-13 18:57:07,498 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3254 transitions. [2022-12-13 18:57:07,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3254 transitions. [2022-12-13 18:57:07,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:07,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3254 transitions. [2022-12-13 18:57:07,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 112.20689655172414) internal successors, (3254), 29 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:07,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 235.0) internal successors, (7050), 30 states have internal predecessors, (7050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:07,509 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 235.0) internal successors, (7050), 30 states have internal predecessors, (7050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:07,509 INFO L175 Difference]: Start difference. First operand has 251 places, 643 transitions, 14902 flow. Second operand 29 states and 3254 transitions. [2022-12-13 18:57:07,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1317 transitions, 26146 flow [2022-12-13 18:58:55,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1317 transitions, 25418 flow, removed 347 selfloop flow, removed 6 redundant places. [2022-12-13 18:58:55,478 INFO L231 Difference]: Finished difference. Result has 283 places, 853 transitions, 20860 flow [2022-12-13 18:58:55,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=14460, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20860, PETRI_PLACES=283, PETRI_TRANSITIONS=853} [2022-12-13 18:58:55,479 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 254 predicate places. [2022-12-13 18:58:55,479 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 853 transitions, 20860 flow [2022-12-13 18:58:55,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.61538461538461) internal successors, (2720), 26 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:55,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:58:55,479 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:58:55,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 18:58:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 18:58:55,680 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 18:58:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:58:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash 120947969, now seen corresponding path program 7 times [2022-12-13 18:58:55,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:58:55,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364237627] [2022-12-13 18:58:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:58:55,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:58:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:58:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:58:55,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:58:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364237627] [2022-12-13 18:58:55,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364237627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:58:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304944079] [2022-12-13 18:58:55,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:58:55,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:58:55,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:58:55,809 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:58:55,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:58:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:58:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:58:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:58:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:58:55,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:58:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:58:56,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304944079] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:58:56,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:58:56,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 18:58:56,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100618187] [2022-12-13 18:58:56,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:58:56,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 18:58:56,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:58:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 18:58:56,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2022-12-13 18:58:56,170 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 18:58:56,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 853 transitions, 20860 flow. Second operand has 29 states, 29 states have (on average 104.55172413793103) internal successors, (3032), 29 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:56,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:58:56,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 18:58:56,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:59:30,720 INFO L130 PetriNetUnfolder]: 72611/111864 cut-off events. [2022-12-13 18:59:30,720 INFO L131 PetriNetUnfolder]: For 7624873/7624873 co-relation queries the response was YES. [2022-12-13 18:59:32,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986097 conditions, 111864 events. 72611/111864 cut-off events. For 7624873/7624873 co-relation queries the response was YES. Maximal size of possible extension queue 3495. Compared 936175 event pairs, 6924 based on Foata normal form. 1348/113212 useless extension candidates. Maximal degree in co-relation 985979. Up to 48544 conditions per place. [2022-12-13 18:59:32,572 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 768 selfloop transitions, 614 changer transitions 0/1382 dead transitions. [2022-12-13 18:59:32,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1382 transitions, 29651 flow [2022-12-13 18:59:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 18:59:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 18:59:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2938 transitions. [2022-12-13 18:59:32,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2022-12-13 18:59:32,575 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2938 transitions. [2022-12-13 18:59:32,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2938 transitions. [2022-12-13 18:59:32,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:59:32,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2938 transitions. [2022-12-13 18:59:32,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 113.0) internal successors, (2938), 26 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:32,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 235.0) internal successors, (6345), 27 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:32,583 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 235.0) internal successors, (6345), 27 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:32,583 INFO L175 Difference]: Start difference. First operand has 283 places, 853 transitions, 20860 flow. Second operand 26 states and 2938 transitions. [2022-12-13 18:59:32,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1382 transitions, 29651 flow [2022-12-13 19:02:24,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1382 transitions, 28842 flow, removed 367 selfloop flow, removed 9 redundant places. [2022-12-13 19:02:24,591 INFO L231 Difference]: Finished difference. Result has 310 places, 960 transitions, 24742 flow [2022-12-13 19:02:24,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=20115, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=24742, PETRI_PLACES=310, PETRI_TRANSITIONS=960} [2022-12-13 19:02:24,592 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 281 predicate places. [2022-12-13 19:02:24,592 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 960 transitions, 24742 flow [2022-12-13 19:02:24,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 104.55172413793103) internal successors, (3032), 29 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:24,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:02:24,592 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:02:24,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 19:02:24,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 19:02:24,793 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-12-13 19:02:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:02:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash -17580029, now seen corresponding path program 3 times [2022-12-13 19:02:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:02:24,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925363132] [2022-12-13 19:02:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:02:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:02:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:02:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:02:24,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:02:24,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925363132] [2022-12-13 19:02:24,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925363132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:02:24,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727679871] [2022-12-13 19:02:24,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:02:24,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:02:24,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:02:24,905 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:02:24,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6abb560-da3f-4c4a-8e50-b4de5c181d40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 19:02:24,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:02:24,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:02:24,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:02:24,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:02:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:02:25,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:02:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:02:25,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727679871] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:02:25,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:02:25,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 19:02:25,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842437804] [2022-12-13 19:02:25,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:02:25,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 19:02:25,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:02:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 19:02:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2022-12-13 19:02:25,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 235 [2022-12-13 19:02:25,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 960 transitions, 24742 flow. Second operand has 29 states, 29 states have (on average 104.55172413793103) internal successors, (3032), 29 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:25,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:02:25,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 235 [2022-12-13 19:02:25,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:03:16,972 INFO L130 PetriNetUnfolder]: 94869/146389 cut-off events. [2022-12-13 19:03:16,972 INFO L131 PetriNetUnfolder]: For 11383039/11383039 co-relation queries the response was YES. [2022-12-13 19:03:19,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1333850 conditions, 146389 events. 94869/146389 cut-off events. For 11383039/11383039 co-relation queries the response was YES. Maximal size of possible extension queue 4684. Compared 1263769 event pairs, 5225 based on Foata normal form. 1647/148036 useless extension candidates. Maximal degree in co-relation 1333720. Up to 49570 conditions per place. [2022-12-13 19:03:19,744 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 831 selfloop transitions, 1014 changer transitions 0/1845 dead transitions. [2022-12-13 19:03:19,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1845 transitions, 41325 flow [2022-12-13 19:03:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 19:03:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 19:03:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3823 transitions. [2022-12-13 19:03:19,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47847309136420524 [2022-12-13 19:03:19,748 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3823 transitions. [2022-12-13 19:03:19,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3823 transitions. [2022-12-13 19:03:19,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:03:19,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3823 transitions. [2022-12-13 19:03:19,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 112.44117647058823) internal successors, (3823), 34 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:19,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 235.0) internal successors, (8225), 35 states have internal predecessors, (8225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:19,757 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 235.0) internal successors, (8225), 35 states have internal predecessors, (8225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:19,758 INFO L175 Difference]: Start difference. First operand has 310 places, 960 transitions, 24742 flow. Second operand 34 states and 3823 transitions. [2022-12-13 19:03:19,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1845 transitions, 41325 flow