./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/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_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/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_fa53bf20-b890-4848-8964-34a1e8c3da63/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 0bf2f5f336333cdf96c271b32cdeb9b70ee932e1c07acf27a63b4425ec902f3e --- 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 13:34:33,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:34:33,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:34:33,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:34:33,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:34:33,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:34:33,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:34:33,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:34:33,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:34:33,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:34:33,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:34:33,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:34:33,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:34:33,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:34:33,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:34:33,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:34:33,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:34:33,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:34:33,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:34:33,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:34:33,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:34:33,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:34:33,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:34:33,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:34:33,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:34:33,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:34:33,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:34:33,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:34:33,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:34:33,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:34:33,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:34:33,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:34:33,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:34:33,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:34:33,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:34:33,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:34:33,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:34:33,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:34:33,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:34:33,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:34:33,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:34:33,113 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 13:34:33,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:34:33,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:34:33,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:34:33,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:34:33,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:34:33,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:34:33,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:34:33,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:34:33,129 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:34:33,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:34:33,129 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:34:33,129 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:34:33,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:34:33,130 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:34:33,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:34:33,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:34:33,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:34:33,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:34:33,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:34:33,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:34:33,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:34:33,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:34:33,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:34:33,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:34:33,132 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:34:33,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:34:33,132 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:34:33,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:34:33,132 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:34:33,132 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_fa53bf20-b890-4848-8964-34a1e8c3da63/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf2f5f336333cdf96c271b32cdeb9b70ee932e1c07acf27a63b4425ec902f3e [2022-12-13 13:34:33,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:34:33,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:34:33,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:34:33,337 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:34:33,338 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:34:33,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i [2022-12-13 13:34:35,848 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:34:36,076 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:34:36,076 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i [2022-12-13 13:34:36,090 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/data/92783a792/c17cb3a8bf3243cebaaefe62ae1adfcc/FLAG3e8735d91 [2022-12-13 13:34:36,419 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/data/92783a792/c17cb3a8bf3243cebaaefe62ae1adfcc [2022-12-13 13:34:36,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:34:36,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:34:36,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:34:36,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:34:36,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:34:36,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:34:36" (1/1) ... [2022-12-13 13:34:36,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e1634e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:36, skipping insertion in model container [2022-12-13 13:34:36,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:34:36" (1/1) ... [2022-12-13 13:34:36,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:34:36,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:34:36,962 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:34:36,965 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:36,966 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:36,969 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:36,970 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:36,970 WARN L623 FunctionHandler]: Unknown extern function sleep [2022-12-13 13:34:36,973 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:34:36,973 WARN L623 FunctionHandler]: Unknown extern function sleep [2022-12-13 13:34:36,974 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:36,975 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:36,976 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:36,976 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:36,979 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:34:36,982 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:36,982 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:36,983 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:36,984 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:36,984 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:36,985 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:36,986 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:36,986 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:36,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:34:36,996 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:34:37,026 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:34:37,027 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:37,028 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:37,029 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:37,029 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:37,029 WARN L623 FunctionHandler]: Unknown extern function sleep [2022-12-13 13:34:37,030 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:34:37,031 WARN L623 FunctionHandler]: Unknown extern function sleep [2022-12-13 13:34:37,031 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:37,031 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:37,032 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:37,033 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:37,034 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:34:37,035 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:37,036 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:37,037 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:37,037 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:37,038 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:37,038 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:37,039 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 13:34:37,039 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-12-13 13:34:37,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:34:37,121 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:34:37,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37 WrapperNode [2022-12-13 13:34:37,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:34:37,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:34:37,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:34:37,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:34:37,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,172 INFO L138 Inliner]: procedures = 524, calls = 61, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 125 [2022-12-13 13:34:37,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:34:37,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:34:37,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:34:37,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:34:37,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,200 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:34:37,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:34:37,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:34:37,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:34:37,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (1/1) ... [2022-12-13 13:34:37,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:34:37,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:37,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:34:37,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:34:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure counter_thread [2022-12-13 13:34:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure counter_thread [2022-12-13 13:34:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure sleep [2022-12-13 13:34:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure monitor_thread [2022-12-13 13:34:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure monitor_thread [2022-12-13 13:34:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:34:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-12-13 13:34:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:34:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:34:37,260 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 13:34:37,482 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:34:37,484 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:34:37,687 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:34:37,695 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:34:37,695 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-12-13 13:34:37,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:34:37 BoogieIcfgContainer [2022-12-13 13:34:37,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:34:37,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:34:37,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:34:37,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:34:37,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:34:36" (1/3) ... [2022-12-13 13:34:37,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68237190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:34:37, skipping insertion in model container [2022-12-13 13:34:37,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:37" (2/3) ... [2022-12-13 13:34:37,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68237190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:34:37, skipping insertion in model container [2022-12-13 13:34:37,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:34:37" (3/3) ... [2022-12-13 13:34:37,706 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_36-trylock_nr.i [2022-12-13 13:34:37,714 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 13:34:37,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:34:37,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 13:34:37,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:34:37,787 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:34:37,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 238 transitions, 492 flow [2022-12-13 13:34:37,883 INFO L130 PetriNetUnfolder]: 32/236 cut-off events. [2022-12-13 13:34:37,883 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:34:37,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 236 events. 32/236 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 495 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 142. Up to 5 conditions per place. [2022-12-13 13:34:37,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 238 transitions, 492 flow [2022-12-13 13:34:37,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 210 transitions, 429 flow [2022-12-13 13:34:37,897 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:34:37,907 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 210 transitions, 429 flow [2022-12-13 13:34:37,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 210 transitions, 429 flow [2022-12-13 13:34:37,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 210 transitions, 429 flow [2022-12-13 13:34:37,949 INFO L130 PetriNetUnfolder]: 28/210 cut-off events. [2022-12-13 13:34:37,949 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:34:37,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 210 events. 28/210 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 448 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 138. Up to 5 conditions per place. [2022-12-13 13:34:37,955 INFO L119 LiptonReduction]: Number of co-enabled transitions 11614 [2022-12-13 13:34:47,336 INFO L134 LiptonReduction]: Checked pairs total: 12665 [2022-12-13 13:34:47,336 INFO L136 LiptonReduction]: Total number of compositions: 233 [2022-12-13 13:34:47,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:34:47,351 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;@3841e9ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:34:47,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-13 13:34:47,353 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 13:34:47,353 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:34:47,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:47,353 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 13:34:47,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:47,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:47,357 INFO L85 PathProgramCache]: Analyzing trace with hash 978, now seen corresponding path program 1 times [2022-12-13 13:34:47,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:47,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2933440] [2022-12-13 13:34:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:47,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:47,513 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 13:34:47,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:47,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2933440] [2022-12-13 13:34:47,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2933440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:47,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:47,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 13:34:47,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403147454] [2022-12-13 13:34:47,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:47,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:34:47,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:47,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:34:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:34:47,541 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 471 [2022-12-13 13:34:47,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 50 transitions, 109 flow. Second operand has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 13:34:47,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:47,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 471 [2022-12-13 13:34:47,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:47,663 INFO L130 PetriNetUnfolder]: 328/595 cut-off events. [2022-12-13 13:34:47,663 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 13:34:47,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 595 events. 328/595 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2819 event pairs, 234 based on Foata normal form. 79/340 useless extension candidates. Maximal degree in co-relation 1056. Up to 512 conditions per place. [2022-12-13 13:34:47,668 INFO L137 encePairwiseOnDemand]: 458/471 looper letters, 25 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2022-12-13 13:34:47,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 117 flow [2022-12-13 13:34:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:34:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:34:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 452 transitions. [2022-12-13 13:34:47,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47983014861995754 [2022-12-13 13:34:47,683 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 452 transitions. [2022-12-13 13:34:47,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 452 transitions. [2022-12-13 13:34:47,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:47,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 452 transitions. [2022-12-13 13:34:47,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 13:34:47,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 471.0) internal successors, (1413), 3 states have internal predecessors, (1413), 0 states have call successors, (0), 0 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 13:34:47,697 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 471.0) internal successors, (1413), 3 states have internal predecessors, (1413), 0 states have call successors, (0), 0 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 13:34:47,699 INFO L175 Difference]: Start difference. First operand has 39 places, 50 transitions, 109 flow. Second operand 2 states and 452 transitions. [2022-12-13 13:34:47,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 117 flow [2022-12-13 13:34:47,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:34:47,702 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 62 flow [2022-12-13 13:34:47,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2022-12-13 13:34:47,707 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2022-12-13 13:34:47,707 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 62 flow [2022-12-13 13:34:47,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 13:34:47,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:47,708 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:34:47,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:34:47,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash 926154072, now seen corresponding path program 1 times [2022-12-13 13:34:47,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:47,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455960113] [2022-12-13 13:34:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:47,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:47,868 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 13:34:47,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:47,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455960113] [2022-12-13 13:34:47,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455960113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:47,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:47,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:47,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248379501] [2022-12-13 13:34:47,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:47,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:47,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:47,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:47,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:34:47,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 13:34:47,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:47,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:34:47,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:48,005 INFO L130 PetriNetUnfolder]: 451/754 cut-off events. [2022-12-13 13:34:48,006 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:34:48,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 754 events. 451/754 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3594 event pairs, 234 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 1481. Up to 512 conditions per place. [2022-12-13 13:34:48,009 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 39 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-12-13 13:34:48,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 178 flow [2022-12-13 13:34:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2022-12-13 13:34:48,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46142958244869076 [2022-12-13 13:34:48,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2022-12-13 13:34:48,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2022-12-13 13:34:48,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:48,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2022-12-13 13:34:48,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 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 13:34:48,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 13:34:48,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 13:34:48,016 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 62 flow. Second operand 3 states and 652 transitions. [2022-12-13 13:34:48,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 178 flow [2022-12-13 13:34:48,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:34:48,018 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2022-12-13 13:34:48,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2022-12-13 13:34:48,018 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -6 predicate places. [2022-12-13 13:34:48,018 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2022-12-13 13:34:48,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 13:34:48,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:48,019 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:34:48,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:34:48,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash 926154007, now seen corresponding path program 1 times [2022-12-13 13:34:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:48,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629267668] [2022-12-13 13:34:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:48,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:48,090 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 13:34:48,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:48,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629267668] [2022-12-13 13:34:48,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629267668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:48,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:48,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:34:48,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861856074] [2022-12-13 13:34:48,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:48,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:48,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:48,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:48,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:34:48,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 13:34:48,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:48,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:34:48,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:48,229 INFO L130 PetriNetUnfolder]: 690/1113 cut-off events. [2022-12-13 13:34:48,230 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2022-12-13 13:34:48,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 1113 events. 690/1113 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5051 event pairs, 181 based on Foata normal form. 52/695 useless extension candidates. Maximal degree in co-relation 2481. Up to 822 conditions per place. [2022-12-13 13:34:48,234 INFO L137 encePairwiseOnDemand]: 465/471 looper letters, 44 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-12-13 13:34:48,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 213 flow [2022-12-13 13:34:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2022-12-13 13:34:48,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4656758669497523 [2022-12-13 13:34:48,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2022-12-13 13:34:48,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2022-12-13 13:34:48,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:48,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2022-12-13 13:34:48,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 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 13:34:48,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 13:34:48,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 13:34:48,240 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 3 states and 658 transitions. [2022-12-13 13:34:48,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 213 flow [2022-12-13 13:34:48,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:48,242 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 94 flow [2022-12-13 13:34:48,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2022-12-13 13:34:48,242 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2022-12-13 13:34:48,242 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 94 flow [2022-12-13 13:34:48,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 13:34:48,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:48,243 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:34:48,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:34:48,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:48,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:48,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1350985906, now seen corresponding path program 1 times [2022-12-13 13:34:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:48,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502584899] [2022-12-13 13:34:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:48,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:48,309 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 13:34:48,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:48,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502584899] [2022-12-13 13:34:48,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502584899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:48,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:48,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22701778] [2022-12-13 13:34:48,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:48,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:48,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:48,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:48,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:48,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 471 [2022-12-13 13:34:48,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 13:34:48,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:48,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 471 [2022-12-13 13:34:48,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:48,492 INFO L130 PetriNetUnfolder]: 981/1770 cut-off events. [2022-12-13 13:34:48,492 INFO L131 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2022-12-13 13:34:48,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1770 events. 981/1770 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 10583 event pairs, 480 based on Foata normal form. 0/1100 useless extension candidates. Maximal degree in co-relation 3980. Up to 962 conditions per place. [2022-12-13 13:34:48,498 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2022-12-13 13:34:48,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 246 flow [2022-12-13 13:34:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2022-12-13 13:34:48,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46638358103326255 [2022-12-13 13:34:48,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2022-12-13 13:34:48,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2022-12-13 13:34:48,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:48,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2022-12-13 13:34:48,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 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 13:34:48,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 13:34:48,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 13:34:48,504 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 94 flow. Second operand 3 states and 659 transitions. [2022-12-13 13:34:48,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 246 flow [2022-12-13 13:34:48,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:48,505 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 106 flow [2022-12-13 13:34:48,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-12-13 13:34:48,506 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2022-12-13 13:34:48,506 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 106 flow [2022-12-13 13:34:48,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 13:34:48,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:48,507 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:34:48,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:34:48,507 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:48,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1353993950, now seen corresponding path program 1 times [2022-12-13 13:34:48,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:48,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376830093] [2022-12-13 13:34:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:48,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:48,581 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 13:34:48,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:48,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376830093] [2022-12-13 13:34:48,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376830093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651419709] [2022-12-13 13:34:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:48,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:48,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:48,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:48,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:34:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:34:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:48,707 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 13:34:48,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:48,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651419709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:48,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:34:48,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-12-13 13:34:48,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078336635] [2022-12-13 13:34:48,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:48,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:34:48,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:48,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:34:48,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:34:48,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:34:48,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 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 13:34:48,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:48,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:34:48,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:48,878 INFO L130 PetriNetUnfolder]: 873/1408 cut-off events. [2022-12-13 13:34:48,879 INFO L131 PetriNetUnfolder]: For 378/384 co-relation queries the response was YES. [2022-12-13 13:34:48,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3511 conditions, 1408 events. 873/1408 cut-off events. For 378/384 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6853 event pairs, 245 based on Foata normal form. 52/988 useless extension candidates. Maximal degree in co-relation 3504. Up to 946 conditions per place. [2022-12-13 13:34:48,883 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 44 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-12-13 13:34:48,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 243 flow [2022-12-13 13:34:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:34:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:34:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2022-12-13 13:34:48,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4548832271762208 [2022-12-13 13:34:48,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2022-12-13 13:34:48,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2022-12-13 13:34:48,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:48,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2022-12-13 13:34:48,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 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 13:34:48,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 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 13:34:48,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 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 13:34:48,891 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 106 flow. Second operand 4 states and 857 transitions. [2022-12-13 13:34:48,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 243 flow [2022-12-13 13:34:48,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:48,892 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 100 flow [2022-12-13 13:34:48,892 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2022-12-13 13:34:48,893 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2022-12-13 13:34:48,893 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 100 flow [2022-12-13 13:34:48,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 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 13:34:48,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:48,893 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:34:48,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:34:49,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:49,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1353993951, now seen corresponding path program 1 times [2022-12-13 13:34:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:49,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306305972] [2022-12-13 13:34:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:49,153 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 13:34:49,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:49,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306305972] [2022-12-13 13:34:49,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306305972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:49,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720080058] [2022-12-13 13:34:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:49,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:49,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:49,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:49,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:34:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:49,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:34:49,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:49,262 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 13:34:49,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:49,278 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 13:34:49,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720080058] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:49,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:49,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 13:34:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422397109] [2022-12-13 13:34:49,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:49,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:34:49,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:49,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:34:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:34:49,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:34:49,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 205.42857142857142) internal successors, (1438), 7 states have internal predecessors, (1438), 0 states have call successors, (0), 0 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 13:34:49,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:49,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:34:49,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:49,606 INFO L130 PetriNetUnfolder]: 1991/3096 cut-off events. [2022-12-13 13:34:49,607 INFO L131 PetriNetUnfolder]: For 618/624 co-relation queries the response was YES. [2022-12-13 13:34:49,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7803 conditions, 3096 events. 1991/3096 cut-off events. For 618/624 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15817 event pairs, 239 based on Foata normal form. 318/2276 useless extension candidates. Maximal degree in co-relation 7796. Up to 1019 conditions per place. [2022-12-13 13:34:49,619 INFO L137 encePairwiseOnDemand]: 466/471 looper letters, 101 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2022-12-13 13:34:49,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 114 transitions, 582 flow [2022-12-13 13:34:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:34:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:34:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1327 transitions. [2022-12-13 13:34:49,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46956829440905873 [2022-12-13 13:34:49,630 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1327 transitions. [2022-12-13 13:34:49,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1327 transitions. [2022-12-13 13:34:49,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:49,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1327 transitions. [2022-12-13 13:34:49,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 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 13:34:49,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 471.0) internal successors, (3297), 7 states have internal predecessors, (3297), 0 states have call successors, (0), 0 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 13:34:49,641 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 471.0) internal successors, (3297), 7 states have internal predecessors, (3297), 0 states have call successors, (0), 0 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 13:34:49,641 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 100 flow. Second operand 6 states and 1327 transitions. [2022-12-13 13:34:49,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 114 transitions, 582 flow [2022-12-13 13:34:49,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 114 transitions, 579 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:49,644 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 195 flow [2022-12-13 13:34:49,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2022-12-13 13:34:49,645 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2022-12-13 13:34:49,645 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 195 flow [2022-12-13 13:34:49,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.42857142857142) internal successors, (1438), 7 states have internal predecessors, (1438), 0 states have call successors, (0), 0 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 13:34:49,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:49,646 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:34:49,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:34:49,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 13:34:49,847 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1353993885, now seen corresponding path program 1 times [2022-12-13 13:34:49,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:49,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66280735] [2022-12-13 13:34:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:49,969 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 13:34:49,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:49,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66280735] [2022-12-13 13:34:49,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66280735] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:49,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:49,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637835979] [2022-12-13 13:34:49,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:49,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:49,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:49,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:34:49,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 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 13:34:49,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:49,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:34:49,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:50,253 INFO L130 PetriNetUnfolder]: 1701/2658 cut-off events. [2022-12-13 13:34:50,254 INFO L131 PetriNetUnfolder]: For 1061/1139 co-relation queries the response was YES. [2022-12-13 13:34:50,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7529 conditions, 2658 events. 1701/2658 cut-off events. For 1061/1139 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13357 event pairs, 162 based on Foata normal form. 0/1924 useless extension candidates. Maximal degree in co-relation 7519. Up to 2290 conditions per place. [2022-12-13 13:34:50,268 INFO L137 encePairwiseOnDemand]: 469/471 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-12-13 13:34:50,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 317 flow [2022-12-13 13:34:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 650 transitions. [2022-12-13 13:34:50,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4600141542816702 [2022-12-13 13:34:50,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 650 transitions. [2022-12-13 13:34:50,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 650 transitions. [2022-12-13 13:34:50,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:50,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 650 transitions. [2022-12-13 13:34:50,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 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 13:34:50,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 13:34:50,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 13:34:50,276 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 195 flow. Second operand 3 states and 650 transitions. [2022-12-13 13:34:50,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 317 flow [2022-12-13 13:34:50,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 309 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:50,283 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 167 flow [2022-12-13 13:34:50,283 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2022-12-13 13:34:50,283 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2022-12-13 13:34:50,284 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 167 flow [2022-12-13 13:34:50,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 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 13:34:50,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:50,284 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:50,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:34:50,284 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:50,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1069110692, now seen corresponding path program 1 times [2022-12-13 13:34:50,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:50,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046044030] [2022-12-13 13:34:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:50,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:50,352 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 13:34:50,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046044030] [2022-12-13 13:34:50,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046044030] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717173102] [2022-12-13 13:34:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:50,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:50,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:50,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:50,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:34:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:50,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:34:50,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:50,459 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 13:34:50,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:50,471 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 13:34:50,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717173102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:50,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:50,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:34:50,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835137238] [2022-12-13 13:34:50,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:50,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:34:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:50,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:34:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:34:50,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 471 [2022-12-13 13:34:50,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 167 flow. Second operand has 7 states, 7 states have (on average 206.71428571428572) internal successors, (1447), 7 states have internal predecessors, (1447), 0 states have call successors, (0), 0 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 13:34:50,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:50,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 471 [2022-12-13 13:34:50,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:51,090 INFO L130 PetriNetUnfolder]: 3768/6443 cut-off events. [2022-12-13 13:34:51,090 INFO L131 PetriNetUnfolder]: For 6419/6419 co-relation queries the response was YES. [2022-12-13 13:34:51,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17084 conditions, 6443 events. 3768/6443 cut-off events. For 6419/6419 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 43526 event pairs, 696 based on Foata normal form. 0/4775 useless extension candidates. Maximal degree in co-relation 17073. Up to 1480 conditions per place. [2022-12-13 13:34:51,114 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 141 selfloop transitions, 9 changer transitions 0/153 dead transitions. [2022-12-13 13:34:51,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 153 transitions, 1068 flow [2022-12-13 13:34:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:34:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:34:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1534 transitions. [2022-12-13 13:34:51,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46527145890203214 [2022-12-13 13:34:51,118 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1534 transitions. [2022-12-13 13:34:51,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1534 transitions. [2022-12-13 13:34:51,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:51,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1534 transitions. [2022-12-13 13:34:51,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 219.14285714285714) internal successors, (1534), 7 states have internal predecessors, (1534), 0 states have call successors, (0), 0 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 13:34:51,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 states have internal predecessors, (3768), 0 states have call successors, (0), 0 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 13:34:51,129 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 states have internal predecessors, (3768), 0 states have call successors, (0), 0 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 13:34:51,129 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 167 flow. Second operand 7 states and 1534 transitions. [2022-12-13 13:34:51,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 153 transitions, 1068 flow [2022-12-13 13:34:51,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 153 transitions, 1068 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:34:51,135 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 226 flow [2022-12-13 13:34:51,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2022-12-13 13:34:51,136 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2022-12-13 13:34:51,136 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 226 flow [2022-12-13 13:34:51,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 206.71428571428572) internal successors, (1447), 7 states have internal predecessors, (1447), 0 states have call successors, (0), 0 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 13:34:51,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:51,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:51,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:34:51,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:51,338 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:51,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1069110690, now seen corresponding path program 1 times [2022-12-13 13:34:51,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:51,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272236328] [2022-12-13 13:34:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:51,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:51,492 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 13:34:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:51,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272236328] [2022-12-13 13:34:51,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272236328] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:51,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559113780] [2022-12-13 13:34:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:51,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:51,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:51,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:51,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:34:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:34:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:51,601 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 13:34:51,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:51,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559113780] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:51,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:34:51,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 13:34:51,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455662515] [2022-12-13 13:34:51,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:51,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:34:51,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:34:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:34:51,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 471 [2022-12-13 13:34:51,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 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 13:34:51,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:51,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 471 [2022-12-13 13:34:51,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:52,111 INFO L130 PetriNetUnfolder]: 3408/6007 cut-off events. [2022-12-13 13:34:52,111 INFO L131 PetriNetUnfolder]: For 6517/6517 co-relation queries the response was YES. [2022-12-13 13:34:52,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16674 conditions, 6007 events. 3408/6007 cut-off events. For 6517/6517 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 42134 event pairs, 105 based on Foata normal form. 152/4893 useless extension candidates. Maximal degree in co-relation 16659. Up to 3952 conditions per place. [2022-12-13 13:34:52,130 INFO L137 encePairwiseOnDemand]: 468/471 looper letters, 75 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2022-12-13 13:34:52,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 579 flow [2022-12-13 13:34:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:34:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:34:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 868 transitions. [2022-12-13 13:34:52,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4607218683651805 [2022-12-13 13:34:52,132 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 868 transitions. [2022-12-13 13:34:52,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 868 transitions. [2022-12-13 13:34:52,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:52,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 868 transitions. [2022-12-13 13:34:52,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 13:34:52,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 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 13:34:52,136 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 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 13:34:52,136 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 226 flow. Second operand 4 states and 868 transitions. [2022-12-13 13:34:52,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 579 flow [2022-12-13 13:34:52,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 571 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:52,143 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 195 flow [2022-12-13 13:34:52,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=195, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2022-12-13 13:34:52,144 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2022-12-13 13:34:52,144 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 195 flow [2022-12-13 13:34:52,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 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 13:34:52,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:52,145 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-12-13 13:34:52,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:34:52,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:52,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:52,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1501964246, now seen corresponding path program 2 times [2022-12-13 13:34:52,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:52,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92196816] [2022-12-13 13:34:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:52,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:52,460 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 13:34:52,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92196816] [2022-12-13 13:34:52,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92196816] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941648075] [2022-12-13 13:34:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:34:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:52,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:52,462 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:52,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:34:52,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:34:52,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:34:52,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:34:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:52,579 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 13:34:52,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:52,624 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 13:34:52,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941648075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:52,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:52,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 13:34:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172852167] [2022-12-13 13:34:52,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:52,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:34:52,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:34:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:34:52,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:34:52,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 195 flow. Second operand has 13 states, 13 states have (on average 204.76923076923077) internal successors, (2662), 13 states have internal predecessors, (2662), 0 states have call successors, (0), 0 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 13:34:52,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:52,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:34:52,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:53,680 INFO L130 PetriNetUnfolder]: 7348/11233 cut-off events. [2022-12-13 13:34:53,680 INFO L131 PetriNetUnfolder]: For 16728/16758 co-relation queries the response was YES. [2022-12-13 13:34:53,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32572 conditions, 11233 events. 7348/11233 cut-off events. For 16728/16758 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 64706 event pairs, 499 based on Foata normal form. 1278/9804 useless extension candidates. Maximal degree in co-relation 32556. Up to 2253 conditions per place. [2022-12-13 13:34:53,714 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 236 selfloop transitions, 20 changer transitions 0/258 dead transitions. [2022-12-13 13:34:53,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 258 transitions, 1631 flow [2022-12-13 13:34:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:34:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:34:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2650 transitions. [2022-12-13 13:34:53,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4688605803255485 [2022-12-13 13:34:53,718 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2650 transitions. [2022-12-13 13:34:53,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2650 transitions. [2022-12-13 13:34:53,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:53,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2650 transitions. [2022-12-13 13:34:53,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 220.83333333333334) internal successors, (2650), 12 states have internal predecessors, (2650), 0 states have call successors, (0), 0 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 13:34:53,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 states have internal predecessors, (6123), 0 states have call successors, (0), 0 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 13:34:53,728 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 states have internal predecessors, (6123), 0 states have call successors, (0), 0 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 13:34:53,728 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 195 flow. Second operand 12 states and 2650 transitions. [2022-12-13 13:34:53,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 258 transitions, 1631 flow [2022-12-13 13:34:53,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 258 transitions, 1598 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:53,741 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 368 flow [2022-12-13 13:34:53,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2022-12-13 13:34:53,742 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2022-12-13 13:34:53,742 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 368 flow [2022-12-13 13:34:53,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 204.76923076923077) internal successors, (2662), 13 states have internal predecessors, (2662), 0 states have call successors, (0), 0 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 13:34:53,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:53,743 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:53,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:34:53,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:53,944 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:53,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1600029490, now seen corresponding path program 2 times [2022-12-13 13:34:53,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:53,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490806650] [2022-12-13 13:34:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:53,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:54,035 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 13:34:54,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:54,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490806650] [2022-12-13 13:34:54,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490806650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:54,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812023426] [2022-12-13 13:34:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:34:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:54,037 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:54,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:34:54,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:34:54,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:34:54,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:34:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:54,145 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 13:34:54,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:54,181 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 13:34:54,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812023426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:54,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:54,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 13:34:54,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650930588] [2022-12-13 13:34:54,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:54,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:34:54,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:54,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:34:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:34:54,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 471 [2022-12-13 13:34:54,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 206.3846153846154) internal successors, (2683), 13 states have internal predecessors, (2683), 0 states have call successors, (0), 0 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 13:34:54,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:54,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 471 [2022-12-13 13:34:54,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:56,526 INFO L130 PetriNetUnfolder]: 15000/26239 cut-off events. [2022-12-13 13:34:56,526 INFO L131 PetriNetUnfolder]: For 67474/67474 co-relation queries the response was YES. [2022-12-13 13:34:56,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76490 conditions, 26239 events. 15000/26239 cut-off events. For 67474/67474 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 211238 event pairs, 1476 based on Foata normal form. 960/21517 useless extension candidates. Maximal degree in co-relation 76468. Up to 4545 conditions per place. [2022-12-13 13:34:56,630 INFO L137 encePairwiseOnDemand]: 468/471 looper letters, 392 selfloop transitions, 11 changer transitions 0/406 dead transitions. [2022-12-13 13:34:56,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 406 transitions, 4000 flow [2022-12-13 13:34:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:34:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:34:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2638 transitions. [2022-12-13 13:34:56,634 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4667374380750177 [2022-12-13 13:34:56,634 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2638 transitions. [2022-12-13 13:34:56,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2638 transitions. [2022-12-13 13:34:56,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:56,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2638 transitions. [2022-12-13 13:34:56,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 219.83333333333334) internal successors, (2638), 12 states have internal predecessors, (2638), 0 states have call successors, (0), 0 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 13:34:56,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 states have internal predecessors, (6123), 0 states have call successors, (0), 0 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 13:34:56,642 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 states have internal predecessors, (6123), 0 states have call successors, (0), 0 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 13:34:56,642 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 368 flow. Second operand 12 states and 2638 transitions. [2022-12-13 13:34:56,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 406 transitions, 4000 flow [2022-12-13 13:34:56,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 406 transitions, 3404 flow, removed 220 selfloop flow, removed 5 redundant places. [2022-12-13 13:34:56,679 INFO L231 Difference]: Finished difference. Result has 80 places, 56 transitions, 396 flow [2022-12-13 13:34:56,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=396, PETRI_PLACES=80, PETRI_TRANSITIONS=56} [2022-12-13 13:34:56,679 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 41 predicate places. [2022-12-13 13:34:56,679 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 56 transitions, 396 flow [2022-12-13 13:34:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 206.3846153846154) internal successors, (2683), 13 states have internal predecessors, (2683), 0 states have call successors, (0), 0 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 13:34:56,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:56,680 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-13 13:34:56,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:34:56,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 13:34:56,881 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:34:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash 533992438, now seen corresponding path program 3 times [2022-12-13 13:34:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:56,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676324571] [2022-12-13 13:34:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:56,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:57,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:57,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676324571] [2022-12-13 13:34:57,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676324571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:57,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734165146] [2022-12-13 13:34:57,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:34:57,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:57,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:57,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:57,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:34:57,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 13:34:57,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:34:57,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:34:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:57,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:57,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734165146] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:57,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:57,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-12-13 13:34:57,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787453830] [2022-12-13 13:34:57,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:57,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 13:34:57,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:57,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 13:34:57,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:34:57,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:34:57,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 56 transitions, 396 flow. Second operand has 25 states, 25 states have (on average 204.4) internal successors, (5110), 25 states have internal predecessors, (5110), 0 states have call successors, (0), 0 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 13:34:57,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:57,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:34:57,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:35:01,974 INFO L130 PetriNetUnfolder]: 31114/46999 cut-off events. [2022-12-13 13:35:01,974 INFO L131 PetriNetUnfolder]: For 325712/325778 co-relation queries the response was YES. [2022-12-13 13:35:02,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143994 conditions, 46999 events. 31114/46999 cut-off events. For 325712/325778 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 303175 event pairs, 1057 based on Foata normal form. 5298/40560 useless extension candidates. Maximal degree in co-relation 143966. Up to 9687 conditions per place. [2022-12-13 13:35:02,223 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 626 selfloop transitions, 44 changer transitions 0/672 dead transitions. [2022-12-13 13:35:02,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 672 transitions, 5546 flow [2022-12-13 13:35:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:35:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 13:35:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5314 transitions. [2022-12-13 13:35:02,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4700990799716914 [2022-12-13 13:35:02,230 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5314 transitions. [2022-12-13 13:35:02,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5314 transitions. [2022-12-13 13:35:02,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:35:02,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5314 transitions. [2022-12-13 13:35:02,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 221.41666666666666) internal successors, (5314), 24 states have internal predecessors, (5314), 0 states have call successors, (0), 0 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 13:35:02,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 471.0) internal successors, (11775), 25 states have internal predecessors, (11775), 0 states have call successors, (0), 0 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 13:35:02,245 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 471.0) internal successors, (11775), 25 states have internal predecessors, (11775), 0 states have call successors, (0), 0 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 13:35:02,245 INFO L175 Difference]: Start difference. First operand has 80 places, 56 transitions, 396 flow. Second operand 24 states and 5314 transitions. [2022-12-13 13:35:02,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 672 transitions, 5546 flow [2022-12-13 13:35:02,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 672 transitions, 4718 flow, removed 299 selfloop flow, removed 5 redundant places. [2022-12-13 13:35:02,363 INFO L231 Difference]: Finished difference. Result has 110 places, 80 transitions, 716 flow [2022-12-13 13:35:02,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=716, PETRI_PLACES=110, PETRI_TRANSITIONS=80} [2022-12-13 13:35:02,364 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 71 predicate places. [2022-12-13 13:35:02,364 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 80 transitions, 716 flow [2022-12-13 13:35:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 204.4) internal successors, (5110), 25 states have internal predecessors, (5110), 0 states have call successors, (0), 0 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 13:35:02,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:35:02,365 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 13:35:02,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:35:02,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:35:02,566 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:35:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1673810674, now seen corresponding path program 3 times [2022-12-13 13:35:02,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:35:02,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952512849] [2022-12-13 13:35:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:02,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:35:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:02,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:35:02,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952512849] [2022-12-13 13:35:02,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952512849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:35:02,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078098391] [2022-12-13 13:35:02,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:35:02,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:35:02,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:35:02,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:35:02,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:35:02,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 13:35:02,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:35:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:35:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:02,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:35:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:03,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078098391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:35:03,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:35:03,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 13:35:03,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944175337] [2022-12-13 13:35:03,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:35:03,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 13:35:03,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:35:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 13:35:03,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:35:03,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 471 [2022-12-13 13:35:03,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 80 transitions, 716 flow. Second operand has 25 states, 25 states have (on average 206.2) internal successors, (5155), 25 states have internal predecessors, (5155), 0 states have call successors, (0), 0 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 13:35:03,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:35:03,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 471 [2022-12-13 13:35:03,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:35:15,000 INFO L130 PetriNetUnfolder]: 62808/109471 cut-off events. [2022-12-13 13:35:15,000 INFO L131 PetriNetUnfolder]: For 577528/577528 co-relation queries the response was YES. [2022-12-13 13:35:15,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323006 conditions, 109471 events. 62808/109471 cut-off events. For 577528/577528 co-relation queries the response was YES. Maximal size of possible extension queue 1848. Compared 980711 event pairs, 3036 based on Foata normal form. 3936/89389 useless extension candidates. Maximal degree in co-relation 322966. Up to 19449 conditions per place. [2022-12-13 13:35:15,861 INFO L137 encePairwiseOnDemand]: 468/471 looper letters, 1364 selfloop transitions, 23 changer transitions 0/1390 dead transitions. [2022-12-13 13:35:15,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 1390 transitions, 15772 flow [2022-12-13 13:35:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:35:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 13:35:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5284 transitions. [2022-12-13 13:35:15,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46744515215852794 [2022-12-13 13:35:15,869 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5284 transitions. [2022-12-13 13:35:15,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5284 transitions. [2022-12-13 13:35:15,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:35:15,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5284 transitions. [2022-12-13 13:35:15,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 220.16666666666666) internal successors, (5284), 24 states have internal predecessors, (5284), 0 states have call successors, (0), 0 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 13:35:15,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 471.0) internal successors, (11775), 25 states have internal predecessors, (11775), 0 states have call successors, (0), 0 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 13:35:15,887 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 471.0) internal successors, (11775), 25 states have internal predecessors, (11775), 0 states have call successors, (0), 0 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 13:35:15,887 INFO L175 Difference]: Start difference. First operand has 110 places, 80 transitions, 716 flow. Second operand 24 states and 5284 transitions. [2022-12-13 13:35:15,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 1390 transitions, 15772 flow [2022-12-13 13:35:16,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 1390 transitions, 13148 flow, removed 874 selfloop flow, removed 11 redundant places. [2022-12-13 13:35:16,277 INFO L231 Difference]: Finished difference. Result has 134 places, 92 transitions, 768 flow [2022-12-13 13:35:16,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=768, PETRI_PLACES=134, PETRI_TRANSITIONS=92} [2022-12-13 13:35:16,277 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2022-12-13 13:35:16,277 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 92 transitions, 768 flow [2022-12-13 13:35:16,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 206.2) internal successors, (5155), 25 states have internal predecessors, (5155), 0 states have call successors, (0), 0 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 13:35:16,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:35:16,278 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1] [2022-12-13 13:35:16,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:35:16,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 13:35:16,480 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:35:16,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:16,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1760896054, now seen corresponding path program 4 times [2022-12-13 13:35:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:35:16,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724275136] [2022-12-13 13:35:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:35:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:35:16,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724275136] [2022-12-13 13:35:16,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724275136] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:35:16,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440037457] [2022-12-13 13:35:16,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:35:16,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:35:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:35:16,815 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:35:16,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:35:16,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:35:16,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:35:16,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:35:16,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:16,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:35:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:17,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440037457] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:35:17,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:35:17,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-12-13 13:35:17,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860230171] [2022-12-13 13:35:17,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:35:17,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 13:35:17,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:35:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 13:35:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 13:35:17,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:35:17,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 92 transitions, 768 flow. Second operand has 49 states, 49 states have (on average 204.20408163265307) internal successors, (10006), 49 states have internal predecessors, (10006), 0 states have call successors, (0), 0 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 13:35:17,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:35:17,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:35:17,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:35:42,327 INFO L130 PetriNetUnfolder]: 127894/191971 cut-off events. [2022-12-13 13:35:42,327 INFO L131 PetriNetUnfolder]: For 5654249/5654387 co-relation queries the response was YES. [2022-12-13 13:35:43,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593238 conditions, 191971 events. 127894/191971 cut-off events. For 5654249/5654387 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 1362065 event pairs, 2173 based on Foata normal form. 21546/164712 useless extension candidates. Maximal degree in co-relation 593186. Up to 40107 conditions per place. [2022-12-13 13:35:44,290 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 1838 selfloop transitions, 92 changer transitions 0/1932 dead transitions. [2022-12-13 13:35:44,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 1932 transitions, 18662 flow [2022-12-13 13:35:44,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 13:35:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 13:35:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 10642 transitions. [2022-12-13 13:35:44,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4707183297947629 [2022-12-13 13:35:44,300 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 10642 transitions. [2022-12-13 13:35:44,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 10642 transitions. [2022-12-13 13:35:44,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:35:44,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 10642 transitions. [2022-12-13 13:35:44,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 221.70833333333334) internal successors, (10642), 48 states have internal predecessors, (10642), 0 states have call successors, (0), 0 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 13:35:44,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 471.0) internal successors, (23079), 49 states have internal predecessors, (23079), 0 states have call successors, (0), 0 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 13:35:44,329 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 471.0) internal successors, (23079), 49 states have internal predecessors, (23079), 0 states have call successors, (0), 0 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 13:35:44,329 INFO L175 Difference]: Start difference. First operand has 134 places, 92 transitions, 768 flow. Second operand 48 states and 10642 transitions. [2022-12-13 13:35:44,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 1932 transitions, 18662 flow [2022-12-13 13:35:45,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 1932 transitions, 15278 flow, removed 1175 selfloop flow, removed 11 redundant places. [2022-12-13 13:35:45,426 INFO L231 Difference]: Finished difference. Result has 194 places, 140 transitions, 1412 flow [2022-12-13 13:35:45,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1412, PETRI_PLACES=194, PETRI_TRANSITIONS=140} [2022-12-13 13:35:45,426 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 155 predicate places. [2022-12-13 13:35:45,426 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 140 transitions, 1412 flow [2022-12-13 13:35:45,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 204.20408163265307) internal successors, (10006), 49 states have internal predecessors, (10006), 0 states have call successors, (0), 0 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 13:35:45,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:35:45,427 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 13:35:45,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 13:35:45,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 13:35:45,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:35:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash -141263474, now seen corresponding path program 4 times [2022-12-13 13:35:45,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:35:45,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817411448] [2022-12-13 13:35:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:45,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:35:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:35:46,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817411448] [2022-12-13 13:35:46,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817411448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:35:46,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159763026] [2022-12-13 13:35:46,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:35:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:35:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:35:46,028 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:35:46,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:35:46,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:35:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:35:46,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:35:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:46,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:35:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:46,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159763026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:35:46,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:35:46,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-13 13:35:46,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527150827] [2022-12-13 13:35:46,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:35:46,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 13:35:46,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:35:46,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 13:35:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 13:35:46,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 471 [2022-12-13 13:35:46,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 140 transitions, 1412 flow. Second operand has 49 states, 49 states have (on average 206.10204081632654) internal successors, (10099), 49 states have internal predecessors, (10099), 0 states have call successors, (0), 0 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 13:35:46,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:35:46,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 471 [2022-12-13 13:35:46,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:36:55,690 INFO L130 PetriNetUnfolder]: 256920/447007 cut-off events. [2022-12-13 13:36:55,690 INFO L131 PetriNetUnfolder]: For 6431284/6431284 co-relation queries the response was YES. [2022-12-13 13:37:01,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326662 conditions, 447007 events. 256920/447007 cut-off events. For 6431284/6431284 co-relation queries the response was YES. Maximal size of possible extension queue 3862. Compared 4383902 event pairs, 6156 based on Foata normal form. 15936/364237 useless extension candidates. Maximal degree in co-relation 1326586. Up to 80361 conditions per place. [2022-12-13 13:37:02,865 INFO L137 encePairwiseOnDemand]: 468/471 looper letters, 5036 selfloop transitions, 47 changer transitions 0/5086 dead transitions. [2022-12-13 13:37:02,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 5086 transitions, 62644 flow [2022-12-13 13:37:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 13:37:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 13:37:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 10576 transitions. [2022-12-13 13:37:02,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4677990092002831 [2022-12-13 13:37:02,875 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 10576 transitions. [2022-12-13 13:37:02,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 10576 transitions. [2022-12-13 13:37:02,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:37:02,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 10576 transitions. [2022-12-13 13:37:02,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 220.33333333333334) internal successors, (10576), 48 states have internal predecessors, (10576), 0 states have call successors, (0), 0 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 13:37:02,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 471.0) internal successors, (23079), 49 states have internal predecessors, (23079), 0 states have call successors, (0), 0 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 13:37:02,904 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 471.0) internal successors, (23079), 49 states have internal predecessors, (23079), 0 states have call successors, (0), 0 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 13:37:02,904 INFO L175 Difference]: Start difference. First operand has 194 places, 140 transitions, 1412 flow. Second operand 48 states and 10576 transitions. [2022-12-13 13:37:02,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 5086 transitions, 62644 flow [2022-12-13 13:37:06,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 5086 transitions, 51644 flow, removed 3478 selfloop flow, removed 23 redundant places. [2022-12-13 13:37:06,267 INFO L231 Difference]: Finished difference. Result has 242 places, 164 transitions, 1512 flow [2022-12-13 13:37:06,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1512, PETRI_PLACES=242, PETRI_TRANSITIONS=164} [2022-12-13 13:37:06,267 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 203 predicate places. [2022-12-13 13:37:06,267 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 164 transitions, 1512 flow [2022-12-13 13:37:06,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 206.10204081632654) internal successors, (10099), 49 states have internal predecessors, (10099), 0 states have call successors, (0), 0 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 13:37:06,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:37:06,269 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1] [2022-12-13 13:37:06,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 13:37:06,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 13:37:06,470 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 13:37:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:37:06,472 INFO L85 PathProgramCache]: Analyzing trace with hash 549725366, now seen corresponding path program 5 times [2022-12-13 13:37:06,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:37:06,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680864608] [2022-12-13 13:37:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:37:06,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:37:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:37:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:37:07,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:37:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680864608] [2022-12-13 13:37:07,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680864608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:37:07,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597670994] [2022-12-13 13:37:07,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:37:07,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:37:07,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:37:07,591 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:37:07,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa53bf20-b890-4848-8964-34a1e8c3da63/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 13:37:07,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 13:37:07,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:37:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 13:37:07,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:37:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:37:07,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:37:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:37:09,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597670994] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:37:09,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:37:09,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2022-12-13 13:37:09,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237359904] [2022-12-13 13:37:09,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:37:09,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-13 13:37:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:37:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-13 13:37:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 13:37:09,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2022-12-13 13:37:09,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 164 transitions, 1512 flow. Second operand has 97 states, 97 states have (on average 204.10309278350516) internal successors, (19798), 97 states have internal predecessors, (19798), 0 states have call successors, (0), 0 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 13:37:09,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:37:09,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2022-12-13 13:37:09,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand