./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack_longest-1.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_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/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_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/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_4cb01299-2933-49f6-9b62-180c7697a67c/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 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- 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 15:55:02,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:55:02,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:55:02,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:55:02,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:55:02,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:55:02,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:55:02,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:55:02,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:55:02,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:55:02,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:55:02,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:55:03,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:55:03,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:55:03,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:55:03,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:55:03,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:55:03,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:55:03,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:55:03,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:55:03,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:55:03,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:55:03,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:55:03,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:55:03,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:55:03,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:55:03,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:55:03,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:55:03,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:55:03,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:55:03,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:55:03,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:55:03,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:55:03,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:55:03,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:55:03,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:55:03,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:55:03,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:55:03,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:55:03,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:55:03,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:55:03,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 15:55:03,045 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:55:03,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:55:03,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:55:03,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:55:03,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:55:03,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:55:03,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:55:03,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:55:03,048 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:55:03,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:55:03,048 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:55:03,048 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:55:03,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:55:03,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:55:03,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:55:03,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:55:03,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:55:03,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:55:03,049 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 15:55:03,049 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:55:03,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:55:03,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:55:03,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:55:03,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:55:03,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:55:03,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:55:03,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:55:03,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:55:03,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:55:03,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:55:03,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:55:03,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:55:03,051 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:55:03,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:55:03,052 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:55:03,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:55:03,052 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:55:03,052 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_4cb01299-2933-49f6-9b62-180c7697a67c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2022-12-13 15:55:03,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:55:03,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:55:03,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:55:03,255 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:55:03,256 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:55:03,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/stack_longest-1.i [2022-12-13 15:55:05,874 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:55:06,054 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:55:06,054 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/sv-benchmarks/c/pthread/stack_longest-1.i [2022-12-13 15:55:06,063 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/data/b12e2472e/6e3b16350d97429ea5364e20d203fecc/FLAGcd4df4a4c [2022-12-13 15:55:06,074 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/data/b12e2472e/6e3b16350d97429ea5364e20d203fecc [2022-12-13 15:55:06,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:55:06,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:55:06,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:55:06,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:55:06,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:55:06,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764497e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06, skipping insertion in model container [2022-12-13 15:55:06,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:55:06,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:55:06,412 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-12-13 15:55:06,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:55:06,441 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:55:06,463 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-12-13 15:55:06,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:55:06,502 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:55:06,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06 WrapperNode [2022-12-13 15:55:06,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:55:06,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:55:06,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:55:06,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:55:06,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,537 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-12-13 15:55:06,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:55:06,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:55:06,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:55:06,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:55:06,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,556 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:55:06,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:55:06,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:55:06,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:55:06,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (1/1) ... [2022-12-13 15:55:06,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:55:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:06,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:55:06,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:55:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 15:55:06,629 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 15:55:06,630 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:55:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:55:06,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:55:06,631 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 15:55:06,743 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:55:06,745 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:55:06,944 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:55:06,950 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:55:06,950 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 15:55:06,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:55:06 BoogieIcfgContainer [2022-12-13 15:55:06,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:55:06,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:55:06,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:55:06,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:55:06,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:55:06" (1/3) ... [2022-12-13 15:55:06,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10fb94c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:55:06, skipping insertion in model container [2022-12-13 15:55:06,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:55:06" (2/3) ... [2022-12-13 15:55:06,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10fb94c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:55:06, skipping insertion in model container [2022-12-13 15:55:06,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:55:06" (3/3) ... [2022-12-13 15:55:06,958 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2022-12-13 15:55:06,964 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:55:06,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:55:06,971 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-12-13 15:55:06,971 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:55:07,032 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 15:55:07,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 193 transitions, 402 flow [2022-12-13 15:55:07,110 INFO L130 PetriNetUnfolder]: 10/191 cut-off events. [2022-12-13 15:55:07,111 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:55:07,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 191 events. 10/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 502 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 149. Up to 3 conditions per place. [2022-12-13 15:55:07,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 193 transitions, 402 flow [2022-12-13 15:55:07,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 181 transitions, 371 flow [2022-12-13 15:55:07,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:55:07,132 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 181 transitions, 371 flow [2022-12-13 15:55:07,134 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 181 transitions, 371 flow [2022-12-13 15:55:07,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 181 transitions, 371 flow [2022-12-13 15:55:07,168 INFO L130 PetriNetUnfolder]: 10/181 cut-off events. [2022-12-13 15:55:07,169 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:55:07,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 181 events. 10/181 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 149. Up to 3 conditions per place. [2022-12-13 15:55:07,173 INFO L119 LiptonReduction]: Number of co-enabled transitions 11596 [2022-12-13 15:55:10,564 INFO L134 LiptonReduction]: Checked pairs total: 14850 [2022-12-13 15:55:10,564 INFO L136 LiptonReduction]: Total number of compositions: 169 [2022-12-13 15:55:10,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:55:10,579 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;@555234c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:55:10,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-12-13 15:55:10,583 INFO L130 PetriNetUnfolder]: 1/17 cut-off events. [2022-12-13 15:55:10,583 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:55:10,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:10,584 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:10,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:10,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1015352384, now seen corresponding path program 1 times [2022-12-13 15:55:10,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:10,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657638190] [2022-12-13 15:55:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:10,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:10,782 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 15:55:10,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657638190] [2022-12-13 15:55:10,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657638190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:10,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:10,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:55:10,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490508043] [2022-12-13 15:55:10,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:10,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:55:10,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:10,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:55:10,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:55:10,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 362 [2022-12-13 15:55:10,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:10,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:10,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 362 [2022-12-13 15:55:10,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:11,067 INFO L130 PetriNetUnfolder]: 1247/2026 cut-off events. [2022-12-13 15:55:11,067 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 15:55:11,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4099 conditions, 2026 events. 1247/2026 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9223 event pairs, 425 based on Foata normal form. 0/1383 useless extension candidates. Maximal degree in co-relation 3830. Up to 1297 conditions per place. [2022-12-13 15:55:11,077 INFO L137 encePairwiseOnDemand]: 355/362 looper letters, 62 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2022-12-13 15:55:11,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 66 transitions, 277 flow [2022-12-13 15:55:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:55:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:55:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2022-12-13 15:55:11,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5552486187845304 [2022-12-13 15:55:11,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2022-12-13 15:55:11,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2022-12-13 15:55:11,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:11,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2022-12-13 15:55:11,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 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 15:55:11,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:11,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:11,117 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 89 flow. Second operand 3 states and 603 transitions. [2022-12-13 15:55:11,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 66 transitions, 277 flow [2022-12-13 15:55:11,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 66 transitions, 269 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 15:55:11,123 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 112 flow [2022-12-13 15:55:11,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-12-13 15:55:11,128 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-12-13 15:55:11,128 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 112 flow [2022-12-13 15:55:11,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:11,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:11,129 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:11,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:55:11,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash 211947233, now seen corresponding path program 1 times [2022-12-13 15:55:11,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:11,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050026560] [2022-12-13 15:55:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:11,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:11,213 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 15:55:11,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050026560] [2022-12-13 15:55:11,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050026560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:11,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:11,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:55:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294969397] [2022-12-13 15:55:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:11,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:55:11,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:55:11,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:55:11,223 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 362 [2022-12-13 15:55:11,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 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 15:55:11,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:11,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 362 [2022-12-13 15:55:11,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:11,503 INFO L130 PetriNetUnfolder]: 1851/3098 cut-off events. [2022-12-13 15:55:11,503 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-12-13 15:55:11,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6637 conditions, 3098 events. 1851/3098 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15930 event pairs, 896 based on Foata normal form. 0/2410 useless extension candidates. Maximal degree in co-relation 5804. Up to 1884 conditions per place. [2022-12-13 15:55:11,514 INFO L137 encePairwiseOnDemand]: 357/362 looper letters, 72 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2022-12-13 15:55:11,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 347 flow [2022-12-13 15:55:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:55:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:55:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2022-12-13 15:55:11,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5589318600368324 [2022-12-13 15:55:11,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2022-12-13 15:55:11,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2022-12-13 15:55:11,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:11,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2022-12-13 15:55:11,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 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 15:55:11,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:11,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:11,522 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 112 flow. Second operand 3 states and 607 transitions. [2022-12-13 15:55:11,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 347 flow [2022-12-13 15:55:11,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 75 transitions, 337 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:55:11,526 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 122 flow [2022-12-13 15:55:11,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-12-13 15:55:11,527 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2022-12-13 15:55:11,527 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 122 flow [2022-12-13 15:55:11,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 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 15:55:11,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:11,528 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:11,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:55:11,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:11,529 INFO L85 PathProgramCache]: Analyzing trace with hash 947987787, now seen corresponding path program 1 times [2022-12-13 15:55:11,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:11,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014143570] [2022-12-13 15:55:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:11,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:11,601 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 15:55:11,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014143570] [2022-12-13 15:55:11,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014143570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:11,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:11,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:55:11,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118432238] [2022-12-13 15:55:11,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:11,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:55:11,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:55:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:55:11,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 362 [2022-12-13 15:55:11,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 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 15:55:11,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:11,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 362 [2022-12-13 15:55:11,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:11,885 INFO L130 PetriNetUnfolder]: 2470/3987 cut-off events. [2022-12-13 15:55:11,885 INFO L131 PetriNetUnfolder]: For 480/480 co-relation queries the response was YES. [2022-12-13 15:55:11,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9199 conditions, 3987 events. 2470/3987 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21518 event pairs, 1334 based on Foata normal form. 0/3137 useless extension candidates. Maximal degree in co-relation 7526. Up to 3038 conditions per place. [2022-12-13 15:55:11,899 INFO L137 encePairwiseOnDemand]: 357/362 looper letters, 70 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-12-13 15:55:11,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 73 transitions, 350 flow [2022-12-13 15:55:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:55:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:55:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2022-12-13 15:55:11,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5561694290976059 [2022-12-13 15:55:11,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2022-12-13 15:55:11,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2022-12-13 15:55:11,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:11,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2022-12-13 15:55:11,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 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 15:55:11,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:11,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:11,938 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 122 flow. Second operand 3 states and 604 transitions. [2022-12-13 15:55:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 73 transitions, 350 flow [2022-12-13 15:55:11,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 73 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:55:11,940 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 136 flow [2022-12-13 15:55:11,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2022-12-13 15:55:11,940 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-12-13 15:55:11,941 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 136 flow [2022-12-13 15:55:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 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 15:55:11,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:11,942 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:11,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:55:11,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1016029171, now seen corresponding path program 1 times [2022-12-13 15:55:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:11,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498651521] [2022-12-13 15:55:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:11,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:11,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:11,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498651521] [2022-12-13 15:55:11,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498651521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:11,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:11,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:55:11,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308749680] [2022-12-13 15:55:11,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:11,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:55:11,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:11,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:55:11,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:55:11,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 362 [2022-12-13 15:55:11,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 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 15:55:11,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:11,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 362 [2022-12-13 15:55:11,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:12,287 INFO L130 PetriNetUnfolder]: 2163/3602 cut-off events. [2022-12-13 15:55:12,288 INFO L131 PetriNetUnfolder]: For 598/598 co-relation queries the response was YES. [2022-12-13 15:55:12,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8394 conditions, 3602 events. 2163/3602 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19901 event pairs, 95 based on Foata normal form. 0/3012 useless extension candidates. Maximal degree in co-relation 7952. Up to 3316 conditions per place. [2022-12-13 15:55:12,303 INFO L137 encePairwiseOnDemand]: 360/362 looper letters, 61 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2022-12-13 15:55:12,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 321 flow [2022-12-13 15:55:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:55:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:55:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-12-13 15:55:12,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5441988950276243 [2022-12-13 15:55:12,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-12-13 15:55:12,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-12-13 15:55:12,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:12,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-12-13 15:55:12,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 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 15:55:12,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:12,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:12,312 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 136 flow. Second operand 3 states and 591 transitions. [2022-12-13 15:55:12,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 321 flow [2022-12-13 15:55:12,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:55:12,315 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 132 flow [2022-12-13 15:55:12,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-12-13 15:55:12,316 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-12-13 15:55:12,316 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 132 flow [2022-12-13 15:55:12,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 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 15:55:12,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:12,317 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:12,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:55:12,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1016029148, now seen corresponding path program 1 times [2022-12-13 15:55:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:12,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673153721] [2022-12-13 15:55:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:12,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:55:12,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:12,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673153721] [2022-12-13 15:55:12,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673153721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:12,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:12,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:55:12,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696371557] [2022-12-13 15:55:12,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:12,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:55:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:55:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:55:12,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 362 [2022-12-13 15:55:12,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 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 15:55:12,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:12,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 362 [2022-12-13 15:55:12,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:12,637 INFO L130 PetriNetUnfolder]: 2050/3411 cut-off events. [2022-12-13 15:55:12,637 INFO L131 PetriNetUnfolder]: For 631/631 co-relation queries the response was YES. [2022-12-13 15:55:12,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7874 conditions, 3411 events. 2050/3411 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18468 event pairs, 305 based on Foata normal form. 0/2909 useless extension candidates. Maximal degree in co-relation 7300. Up to 2665 conditions per place. [2022-12-13 15:55:12,653 INFO L137 encePairwiseOnDemand]: 358/362 looper letters, 58 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2022-12-13 15:55:12,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 317 flow [2022-12-13 15:55:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:55:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:55:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2022-12-13 15:55:12,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2022-12-13 15:55:12,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2022-12-13 15:55:12,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2022-12-13 15:55:12,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:12,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2022-12-13 15:55:12,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 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 15:55:12,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:12,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:12,658 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 132 flow. Second operand 3 states and 588 transitions. [2022-12-13 15:55:12,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 317 flow [2022-12-13 15:55:12,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:55:12,659 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 143 flow [2022-12-13 15:55:12,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2022-12-13 15:55:12,660 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-12-13 15:55:12,660 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 143 flow [2022-12-13 15:55:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 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 15:55:12,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:12,660 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:12,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:55:12,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash 517406451, now seen corresponding path program 1 times [2022-12-13 15:55:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:12,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843167962] [2022-12-13 15:55:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:12,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:12,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843167962] [2022-12-13 15:55:12,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843167962] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:12,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418007230] [2022-12-13 15:55:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:12,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:12,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:12,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:12,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:55:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:55:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:12,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:12,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418007230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:12,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:12,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-13 15:55:12,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739145162] [2022-12-13 15:55:12,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:12,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:55:12,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:12,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:55:12,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:55:12,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 362 [2022-12-13 15:55:12,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 143 flow. Second operand has 10 states, 10 states have (on average 176.7) internal successors, (1767), 10 states have internal predecessors, (1767), 0 states have call successors, (0), 0 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 15:55:12,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:12,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 362 [2022-12-13 15:55:12,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:13,685 INFO L130 PetriNetUnfolder]: 4129/6750 cut-off events. [2022-12-13 15:55:13,686 INFO L131 PetriNetUnfolder]: For 3033/3033 co-relation queries the response was YES. [2022-12-13 15:55:13,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16816 conditions, 6750 events. 4129/6750 cut-off events. For 3033/3033 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 37066 event pairs, 703 based on Foata normal form. 98/5882 useless extension candidates. Maximal degree in co-relation 16008. Up to 2067 conditions per place. [2022-12-13 15:55:13,707 INFO L137 encePairwiseOnDemand]: 352/362 looper letters, 217 selfloop transitions, 34 changer transitions 2/254 dead transitions. [2022-12-13 15:55:13,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 254 transitions, 1375 flow [2022-12-13 15:55:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:55:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:55:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2663 transitions. [2022-12-13 15:55:13,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5254538279400158 [2022-12-13 15:55:13,717 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2663 transitions. [2022-12-13 15:55:13,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2663 transitions. [2022-12-13 15:55:13,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:13,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2663 transitions. [2022-12-13 15:55:13,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 190.21428571428572) internal successors, (2663), 14 states have internal predecessors, (2663), 0 states have call successors, (0), 0 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 15:55:13,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 362.0) internal successors, (5430), 15 states have internal predecessors, (5430), 0 states have call successors, (0), 0 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 15:55:13,728 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 362.0) internal successors, (5430), 15 states have internal predecessors, (5430), 0 states have call successors, (0), 0 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 15:55:13,728 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 143 flow. Second operand 14 states and 2663 transitions. [2022-12-13 15:55:13,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 254 transitions, 1375 flow [2022-12-13 15:55:13,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 254 transitions, 1335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:55:13,735 INFO L231 Difference]: Finished difference. Result has 64 places, 76 transitions, 377 flow [2022-12-13 15:55:13,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=377, PETRI_PLACES=64, PETRI_TRANSITIONS=76} [2022-12-13 15:55:13,736 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2022-12-13 15:55:13,736 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 76 transitions, 377 flow [2022-12-13 15:55:13,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.7) internal successors, (1767), 10 states have internal predecessors, (1767), 0 states have call successors, (0), 0 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 15:55:13,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:13,737 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:13,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:55:13,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:13,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 923065306, now seen corresponding path program 1 times [2022-12-13 15:55:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:13,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586603539] [2022-12-13 15:55:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:14,073 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 15:55:14,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:14,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586603539] [2022-12-13 15:55:14,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586603539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:14,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:14,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:55:14,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737508051] [2022-12-13 15:55:14,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:14,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:55:14,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:55:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:55:14,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 362 [2022-12-13 15:55:14,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 76 transitions, 377 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 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 15:55:14,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:14,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 362 [2022-12-13 15:55:14,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:14,327 INFO L130 PetriNetUnfolder]: 1449/2620 cut-off events. [2022-12-13 15:55:14,327 INFO L131 PetriNetUnfolder]: For 1868/1868 co-relation queries the response was YES. [2022-12-13 15:55:14,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7473 conditions, 2620 events. 1449/2620 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 14011 event pairs, 289 based on Foata normal form. 232/2706 useless extension candidates. Maximal degree in co-relation 7059. Up to 1984 conditions per place. [2022-12-13 15:55:14,336 INFO L137 encePairwiseOnDemand]: 355/362 looper letters, 58 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2022-12-13 15:55:14,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 437 flow [2022-12-13 15:55:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:55:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:55:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2022-12-13 15:55:14,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5322283609576427 [2022-12-13 15:55:14,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2022-12-13 15:55:14,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2022-12-13 15:55:14,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:14,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2022-12-13 15:55:14,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 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 15:55:14,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:14,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:14,341 INFO L175 Difference]: Start difference. First operand has 64 places, 76 transitions, 377 flow. Second operand 3 states and 578 transitions. [2022-12-13 15:55:14,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 437 flow [2022-12-13 15:55:14,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 419 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 15:55:14,350 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 259 flow [2022-12-13 15:55:14,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2022-12-13 15:55:14,351 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2022-12-13 15:55:14,351 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 259 flow [2022-12-13 15:55:14,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 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 15:55:14,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:14,352 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:14,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:55:14,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1140941030, now seen corresponding path program 1 times [2022-12-13 15:55:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625135859] [2022-12-13 15:55:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:14,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:14,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625135859] [2022-12-13 15:55:14,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625135859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:14,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110816706] [2022-12-13 15:55:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:14,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:14,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:14,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:14,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:55:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:14,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:55:14,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:14,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:55:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110816706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:14,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:55:14,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 15:55:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300127176] [2022-12-13 15:55:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:55:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:55:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:55:14,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 362 [2022-12-13 15:55:14,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 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 15:55:14,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:14,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 362 [2022-12-13 15:55:14,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:14,845 INFO L130 PetriNetUnfolder]: 1471/2734 cut-off events. [2022-12-13 15:55:14,845 INFO L131 PetriNetUnfolder]: For 1726/1726 co-relation queries the response was YES. [2022-12-13 15:55:14,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7827 conditions, 2734 events. 1471/2734 cut-off events. For 1726/1726 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 14398 event pairs, 359 based on Foata normal form. 154/2720 useless extension candidates. Maximal degree in co-relation 4552. Up to 1550 conditions per place. [2022-12-13 15:55:14,852 INFO L137 encePairwiseOnDemand]: 352/362 looper letters, 89 selfloop transitions, 17 changer transitions 2/109 dead transitions. [2022-12-13 15:55:14,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 678 flow [2022-12-13 15:55:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:55:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:55:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1135 transitions. [2022-12-13 15:55:14,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5225598526703499 [2022-12-13 15:55:14,854 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1135 transitions. [2022-12-13 15:55:14,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1135 transitions. [2022-12-13 15:55:14,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:14,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1135 transitions. [2022-12-13 15:55:14,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 189.16666666666666) internal successors, (1135), 6 states have internal predecessors, (1135), 0 states have call successors, (0), 0 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 15:55:14,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 362.0) internal successors, (2534), 7 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:55:14,858 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 362.0) internal successors, (2534), 7 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:55:14,858 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 259 flow. Second operand 6 states and 1135 transitions. [2022-12-13 15:55:14,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 678 flow [2022-12-13 15:55:14,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 660 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:55:14,861 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 325 flow [2022-12-13 15:55:14,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2022-12-13 15:55:14,861 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2022-12-13 15:55:14,861 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 325 flow [2022-12-13 15:55:14,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 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 15:55:14,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:14,862 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 15:55:14,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:55:15,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:15,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash 597706622, now seen corresponding path program 1 times [2022-12-13 15:55:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:15,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676371150] [2022-12-13 15:55:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:55:15,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:15,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676371150] [2022-12-13 15:55:15,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676371150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:15,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:15,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:55:15,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136457414] [2022-12-13 15:55:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:15,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:55:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:55:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:55:15,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 362 [2022-12-13 15:55:15,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 15:55:15,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:15,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 362 [2022-12-13 15:55:15,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:15,313 INFO L130 PetriNetUnfolder]: 1323/2436 cut-off events. [2022-12-13 15:55:15,313 INFO L131 PetriNetUnfolder]: For 2368/2372 co-relation queries the response was YES. [2022-12-13 15:55:15,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7332 conditions, 2436 events. 1323/2436 cut-off events. For 2368/2372 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12542 event pairs, 547 based on Foata normal form. 4/2328 useless extension candidates. Maximal degree in co-relation 5096. Up to 1412 conditions per place. [2022-12-13 15:55:15,321 INFO L137 encePairwiseOnDemand]: 358/362 looper letters, 76 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2022-12-13 15:55:15,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 610 flow [2022-12-13 15:55:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:55:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:55:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2022-12-13 15:55:15,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5405156537753223 [2022-12-13 15:55:15,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2022-12-13 15:55:15,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2022-12-13 15:55:15,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:15,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2022-12-13 15:55:15,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 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 15:55:15,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:15,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:15,325 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 325 flow. Second operand 3 states and 587 transitions. [2022-12-13 15:55:15,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 610 flow [2022-12-13 15:55:15,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 584 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-12-13 15:55:15,330 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 316 flow [2022-12-13 15:55:15,330 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2022-12-13 15:55:15,330 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2022-12-13 15:55:15,330 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 316 flow [2022-12-13 15:55:15,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 15:55:15,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:15,331 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 15:55:15,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:55:15,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:15,331 INFO L85 PathProgramCache]: Analyzing trace with hash 597706621, now seen corresponding path program 1 times [2022-12-13 15:55:15,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:15,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054477941] [2022-12-13 15:55:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:15,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:15,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054477941] [2022-12-13 15:55:15,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054477941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:15,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:15,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:55:15,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922156878] [2022-12-13 15:55:15,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:15,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:55:15,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:55:15,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:55:15,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 362 [2022-12-13 15:55:15,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:15,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:15,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 362 [2022-12-13 15:55:15,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:15,587 INFO L130 PetriNetUnfolder]: 1206/2201 cut-off events. [2022-12-13 15:55:15,587 INFO L131 PetriNetUnfolder]: For 2223/2235 co-relation queries the response was YES. [2022-12-13 15:55:15,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6762 conditions, 2201 events. 1206/2201 cut-off events. For 2223/2235 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10944 event pairs, 335 based on Foata normal form. 54/2199 useless extension candidates. Maximal degree in co-relation 6276. Up to 2129 conditions per place. [2022-12-13 15:55:15,593 INFO L137 encePairwiseOnDemand]: 360/362 looper letters, 66 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2022-12-13 15:55:15,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 497 flow [2022-12-13 15:55:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:55:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:55:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-12-13 15:55:15,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5349907918968693 [2022-12-13 15:55:15,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-12-13 15:55:15,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-12-13 15:55:15,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:15,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-12-13 15:55:15,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 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 15:55:15,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:15,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 15:55:15,597 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 316 flow. Second operand 3 states and 581 transitions. [2022-12-13 15:55:15,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 497 flow [2022-12-13 15:55:15,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:55:15,601 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 309 flow [2022-12-13 15:55:15,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=309, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2022-12-13 15:55:15,602 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2022-12-13 15:55:15,602 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 309 flow [2022-12-13 15:55:15,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:15,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:15,602 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:55:15,602 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash 246641987, now seen corresponding path program 1 times [2022-12-13 15:55:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:15,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530760903] [2022-12-13 15:55:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:15,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:15,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530760903] [2022-12-13 15:55:15,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530760903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:15,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945207812] [2022-12-13 15:55:15,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:15,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:15,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:15,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:15,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:55:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 15:55:15,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:55:15,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:55:15,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945207812] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:15,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:55:15,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-12-13 15:55:15,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868131408] [2022-12-13 15:55:15,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:15,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:55:15,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:55:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:55:15,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:55:15,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 309 flow. Second operand has 6 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 15:55:15,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:15,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:55:15,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:16,246 INFO L130 PetriNetUnfolder]: 1553/2788 cut-off events. [2022-12-13 15:55:16,246 INFO L131 PetriNetUnfolder]: For 2743/2743 co-relation queries the response was YES. [2022-12-13 15:55:16,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8385 conditions, 2788 events. 1553/2788 cut-off events. For 2743/2743 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 13709 event pairs, 425 based on Foata normal form. 44/2764 useless extension candidates. Maximal degree in co-relation 7923. Up to 1271 conditions per place. [2022-12-13 15:55:16,254 INFO L137 encePairwiseOnDemand]: 351/362 looper letters, 106 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2022-12-13 15:55:16,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 856 flow [2022-12-13 15:55:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:55:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:55:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1284 transitions. [2022-12-13 15:55:16,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5067087608524072 [2022-12-13 15:55:16,256 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1284 transitions. [2022-12-13 15:55:16,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1284 transitions. [2022-12-13 15:55:16,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:16,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1284 transitions. [2022-12-13 15:55:16,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 183.42857142857142) internal successors, (1284), 7 states have internal predecessors, (1284), 0 states have call successors, (0), 0 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 15:55:16,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 0 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 15:55:16,261 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 0 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 15:55:16,261 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 309 flow. Second operand 7 states and 1284 transitions. [2022-12-13 15:55:16,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 856 flow [2022-12-13 15:55:16,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 127 transitions, 855 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:55:16,266 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 471 flow [2022-12-13 15:55:16,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=471, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2022-12-13 15:55:16,266 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2022-12-13 15:55:16,266 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 471 flow [2022-12-13 15:55:16,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 15:55:16,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:16,267 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:16,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:55:16,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 15:55:16,467 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:16,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:16,468 INFO L85 PathProgramCache]: Analyzing trace with hash -47458617, now seen corresponding path program 1 times [2022-12-13 15:55:16,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:16,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474603047] [2022-12-13 15:55:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:16,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:16,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474603047] [2022-12-13 15:55:16,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474603047] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727069174] [2022-12-13 15:55:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:16,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:16,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:16,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:16,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:55:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 15:55:16,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:55:16,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:55:16,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727069174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:16,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:55:16,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-12-13 15:55:16,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985556234] [2022-12-13 15:55:16,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:16,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:55:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:55:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:55:16,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:55:16,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 471 flow. Second operand has 6 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 15:55:16,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:16,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:55:16,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:17,123 INFO L130 PetriNetUnfolder]: 1625/2928 cut-off events. [2022-12-13 15:55:17,123 INFO L131 PetriNetUnfolder]: For 3550/3550 co-relation queries the response was YES. [2022-12-13 15:55:17,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9096 conditions, 2928 events. 1625/2928 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 14320 event pairs, 393 based on Foata normal form. 62/2916 useless extension candidates. Maximal degree in co-relation 8626. Up to 1590 conditions per place. [2022-12-13 15:55:17,131 INFO L137 encePairwiseOnDemand]: 350/362 looper letters, 69 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2022-12-13 15:55:17,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 787 flow [2022-12-13 15:55:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:55:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:55:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1250 transitions. [2022-12-13 15:55:17,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49329123914759276 [2022-12-13 15:55:17,133 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1250 transitions. [2022-12-13 15:55:17,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1250 transitions. [2022-12-13 15:55:17,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:17,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1250 transitions. [2022-12-13 15:55:17,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.57142857142858) internal successors, (1250), 7 states have internal predecessors, (1250), 0 states have call successors, (0), 0 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 15:55:17,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 0 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 15:55:17,138 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 0 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 15:55:17,138 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 471 flow. Second operand 7 states and 1250 transitions. [2022-12-13 15:55:17,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 787 flow [2022-12-13 15:55:17,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 779 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 15:55:17,146 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 543 flow [2022-12-13 15:55:17,146 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2022-12-13 15:55:17,147 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2022-12-13 15:55:17,147 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 543 flow [2022-12-13 15:55:17,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 15:55:17,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:17,148 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-13 15:55:17,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:55:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 15:55:17,349 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:17,350 INFO L85 PathProgramCache]: Analyzing trace with hash 934316924, now seen corresponding path program 1 times [2022-12-13 15:55:17,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:17,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621954133] [2022-12-13 15:55:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:17,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:17,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621954133] [2022-12-13 15:55:17,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621954133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:17,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913321568] [2022-12-13 15:55:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:17,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:17,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:17,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:17,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:55:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:17,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:55:17,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:17,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:17,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913321568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:17,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:17,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 15:55:17,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832207667] [2022-12-13 15:55:17,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:17,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:55:17,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:17,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:55:17,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:55:17,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 362 [2022-12-13 15:55:17,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 543 flow. Second operand has 18 states, 18 states have (on average 177.05555555555554) internal successors, (3187), 18 states have internal predecessors, (3187), 0 states have call successors, (0), 0 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 15:55:17,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:17,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 362 [2022-12-13 15:55:17,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:18,656 INFO L130 PetriNetUnfolder]: 2857/5150 cut-off events. [2022-12-13 15:55:18,657 INFO L131 PetriNetUnfolder]: For 8269/8269 co-relation queries the response was YES. [2022-12-13 15:55:18,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16952 conditions, 5150 events. 2857/5150 cut-off events. For 8269/8269 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 25103 event pairs, 681 based on Foata normal form. 144/5160 useless extension candidates. Maximal degree in co-relation 16190. Up to 1613 conditions per place. [2022-12-13 15:55:18,671 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 271 selfloop transitions, 31 changer transitions 4/307 dead transitions. [2022-12-13 15:55:18,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 307 transitions, 2255 flow [2022-12-13 15:55:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:55:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 15:55:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3212 transitions. [2022-12-13 15:55:18,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5219369515762106 [2022-12-13 15:55:18,675 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3212 transitions. [2022-12-13 15:55:18,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3212 transitions. [2022-12-13 15:55:18,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:18,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3212 transitions. [2022-12-13 15:55:18,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 188.94117647058823) internal successors, (3212), 17 states have internal predecessors, (3212), 0 states have call successors, (0), 0 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 15:55:18,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 362.0) internal successors, (6516), 18 states have internal predecessors, (6516), 0 states have call successors, (0), 0 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 15:55:18,684 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 362.0) internal successors, (6516), 18 states have internal predecessors, (6516), 0 states have call successors, (0), 0 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 15:55:18,684 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 543 flow. Second operand 17 states and 3212 transitions. [2022-12-13 15:55:18,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 307 transitions, 2255 flow [2022-12-13 15:55:18,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 307 transitions, 2219 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 15:55:18,696 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 835 flow [2022-12-13 15:55:18,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=835, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2022-12-13 15:55:18,697 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2022-12-13 15:55:18,697 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 835 flow [2022-12-13 15:55:18,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 177.05555555555554) internal successors, (3187), 18 states have internal predecessors, (3187), 0 states have call successors, (0), 0 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 15:55:18,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:18,698 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:18,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 15:55:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:55:18,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 24064539, now seen corresponding path program 2 times [2022-12-13 15:55:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:18,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489310728] [2022-12-13 15:55:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:55:19,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:19,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489310728] [2022-12-13 15:55:19,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489310728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:19,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445916939] [2022-12-13 15:55:19,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:55:19,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:19,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:19,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:19,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:55:19,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:55:19,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:19,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:55:19,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:55:19,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:55:19,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445916939] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:19,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:19,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-13 15:55:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707037702] [2022-12-13 15:55:19,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:19,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:55:19,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:55:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:55:19,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 362 [2022-12-13 15:55:19,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 835 flow. Second operand has 16 states, 16 states have (on average 171.625) internal successors, (2746), 16 states have internal predecessors, (2746), 0 states have call successors, (0), 0 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 15:55:19,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:19,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 362 [2022-12-13 15:55:19,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:20,247 INFO L130 PetriNetUnfolder]: 3522/6351 cut-off events. [2022-12-13 15:55:20,247 INFO L131 PetriNetUnfolder]: For 12176/12176 co-relation queries the response was YES. [2022-12-13 15:55:20,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21300 conditions, 6351 events. 3522/6351 cut-off events. For 12176/12176 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 32820 event pairs, 701 based on Foata normal form. 84/6271 useless extension candidates. Maximal degree in co-relation 20435. Up to 1850 conditions per place. [2022-12-13 15:55:20,270 INFO L137 encePairwiseOnDemand]: 353/362 looper letters, 178 selfloop transitions, 58 changer transitions 27/264 dead transitions. [2022-12-13 15:55:20,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 264 transitions, 2141 flow [2022-12-13 15:55:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:55:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:55:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3215 transitions. [2022-12-13 15:55:20,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49340085942295886 [2022-12-13 15:55:20,275 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3215 transitions. [2022-12-13 15:55:20,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3215 transitions. [2022-12-13 15:55:20,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:20,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3215 transitions. [2022-12-13 15:55:20,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 178.61111111111111) internal successors, (3215), 18 states have internal predecessors, (3215), 0 states have call successors, (0), 0 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 15:55:20,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 362.0) internal successors, (6878), 19 states have internal predecessors, (6878), 0 states have call successors, (0), 0 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 15:55:20,287 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 362.0) internal successors, (6878), 19 states have internal predecessors, (6878), 0 states have call successors, (0), 0 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 15:55:20,287 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 835 flow. Second operand 18 states and 3215 transitions. [2022-12-13 15:55:20,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 264 transitions, 2141 flow [2022-12-13 15:55:20,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 264 transitions, 2058 flow, removed 34 selfloop flow, removed 5 redundant places. [2022-12-13 15:55:20,310 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 1079 flow [2022-12-13 15:55:20,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1079, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2022-12-13 15:55:20,311 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2022-12-13 15:55:20,311 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 1079 flow [2022-12-13 15:55:20,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 171.625) internal successors, (2746), 16 states have internal predecessors, (2746), 0 states have call successors, (0), 0 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 15:55:20,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:20,311 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:20,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:55:20,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:20,513 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1312120119, now seen corresponding path program 3 times [2022-12-13 15:55:20,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:20,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930002145] [2022-12-13 15:55:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:55:20,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:20,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930002145] [2022-12-13 15:55:20,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930002145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010870595] [2022-12-13 15:55:20,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:55:20,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:20,730 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:20,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:55:20,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 15:55:20,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:20,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:55:20,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:55:20,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:55:21,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010870595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:21,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:21,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-12-13 15:55:21,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76972870] [2022-12-13 15:55:21,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:21,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:55:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:55:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:55:21,205 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:55:21,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 1079 flow. Second operand has 20 states, 20 states have (on average 172.9) internal successors, (3458), 20 states have internal predecessors, (3458), 0 states have call successors, (0), 0 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 15:55:21,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:21,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:55:21,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:22,508 INFO L130 PetriNetUnfolder]: 3770/6707 cut-off events. [2022-12-13 15:55:22,508 INFO L131 PetriNetUnfolder]: For 14262/14262 co-relation queries the response was YES. [2022-12-13 15:55:22,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 6707 events. 3770/6707 cut-off events. For 14262/14262 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 34424 event pairs, 573 based on Foata normal form. 48/6619 useless extension candidates. Maximal degree in co-relation 22640. Up to 1375 conditions per place. [2022-12-13 15:55:22,529 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 277 selfloop transitions, 86 changer transitions 6/370 dead transitions. [2022-12-13 15:55:22,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 370 transitions, 3193 flow [2022-12-13 15:55:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 15:55:22,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 15:55:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4486 transitions. [2022-12-13 15:55:22,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4956906077348066 [2022-12-13 15:55:22,540 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4486 transitions. [2022-12-13 15:55:22,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4486 transitions. [2022-12-13 15:55:22,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:22,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4486 transitions. [2022-12-13 15:55:22,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 179.44) internal successors, (4486), 25 states have internal predecessors, (4486), 0 states have call successors, (0), 0 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 15:55:22,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 362.0) internal successors, (9412), 26 states have internal predecessors, (9412), 0 states have call successors, (0), 0 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 15:55:22,561 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 362.0) internal successors, (9412), 26 states have internal predecessors, (9412), 0 states have call successors, (0), 0 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 15:55:22,561 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 1079 flow. Second operand 25 states and 4486 transitions. [2022-12-13 15:55:22,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 370 transitions, 3193 flow [2022-12-13 15:55:22,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 370 transitions, 3018 flow, removed 62 selfloop flow, removed 5 redundant places. [2022-12-13 15:55:22,587 INFO L231 Difference]: Finished difference. Result has 133 places, 133 transitions, 1634 flow [2022-12-13 15:55:22,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1634, PETRI_PLACES=133, PETRI_TRANSITIONS=133} [2022-12-13 15:55:22,587 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2022-12-13 15:55:22,587 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 133 transitions, 1634 flow [2022-12-13 15:55:22,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 172.9) internal successors, (3458), 20 states have internal predecessors, (3458), 0 states have call successors, (0), 0 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 15:55:22,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:22,588 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1] [2022-12-13 15:55:22,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:55:22,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:55:22,789 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1187431500, now seen corresponding path program 2 times [2022-12-13 15:55:22,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:22,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992262721] [2022-12-13 15:55:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:22,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:23,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992262721] [2022-12-13 15:55:23,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992262721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:23,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118065650] [2022-12-13 15:55:23,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:55:23,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:23,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:23,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:55:23,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:55:23,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:55:23,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:23,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:23,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118065650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:23,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:23,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-12-13 15:55:23,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500290085] [2022-12-13 15:55:23,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 15:55:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:23,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 15:55:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 15:55:23,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 362 [2022-12-13 15:55:23,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 133 transitions, 1634 flow. Second operand has 34 states, 34 states have (on average 177.02941176470588) internal successors, (6019), 34 states have internal predecessors, (6019), 0 states have call successors, (0), 0 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 15:55:23,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:23,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 362 [2022-12-13 15:55:23,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:25,927 INFO L130 PetriNetUnfolder]: 5854/10451 cut-off events. [2022-12-13 15:55:25,928 INFO L131 PetriNetUnfolder]: For 31804/31804 co-relation queries the response was YES. [2022-12-13 15:55:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37429 conditions, 10451 events. 5854/10451 cut-off events. For 31804/31804 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 51573 event pairs, 1139 based on Foata normal form. 168/10403 useless extension candidates. Maximal degree in co-relation 35943. Up to 3281 conditions per place. [2022-12-13 15:55:25,966 INFO L137 encePairwiseOnDemand]: 355/362 looper letters, 508 selfloop transitions, 78 changer transitions 0/587 dead transitions. [2022-12-13 15:55:25,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 587 transitions, 5071 flow [2022-12-13 15:55:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:55:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 15:55:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6182 transitions. [2022-12-13 15:55:25,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5174953959484346 [2022-12-13 15:55:25,970 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6182 transitions. [2022-12-13 15:55:25,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6182 transitions. [2022-12-13 15:55:25,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:25,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6182 transitions. [2022-12-13 15:55:25,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 187.33333333333334) internal successors, (6182), 33 states have internal predecessors, (6182), 0 states have call successors, (0), 0 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 15:55:25,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 362.0) internal successors, (12308), 34 states have internal predecessors, (12308), 0 states have call successors, (0), 0 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 15:55:25,983 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 362.0) internal successors, (12308), 34 states have internal predecessors, (12308), 0 states have call successors, (0), 0 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 15:55:25,984 INFO L175 Difference]: Start difference. First operand has 133 places, 133 transitions, 1634 flow. Second operand 33 states and 6182 transitions. [2022-12-13 15:55:25,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 587 transitions, 5071 flow [2022-12-13 15:55:26,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 587 transitions, 4961 flow, removed 35 selfloop flow, removed 8 redundant places. [2022-12-13 15:55:26,038 INFO L231 Difference]: Finished difference. Result has 165 places, 169 transitions, 2262 flow [2022-12-13 15:55:26,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2262, PETRI_PLACES=165, PETRI_TRANSITIONS=169} [2022-12-13 15:55:26,039 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2022-12-13 15:55:26,039 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 169 transitions, 2262 flow [2022-12-13 15:55:26,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 177.02941176470588) internal successors, (6019), 34 states have internal predecessors, (6019), 0 states have call successors, (0), 0 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 15:55:26,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:26,039 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:26,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:55:26,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 15:55:26,241 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1246468269, now seen corresponding path program 4 times [2022-12-13 15:55:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:26,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238564032] [2022-12-13 15:55:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:55:26,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:26,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238564032] [2022-12-13 15:55:26,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238564032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:26,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215910826] [2022-12-13 15:55:26,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:55:26,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:26,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:26,513 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:26,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:55:26,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:55:26,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:55:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:55:26,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:55:26,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215910826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:26,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:26,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-12-13 15:55:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437218703] [2022-12-13 15:55:26,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 15:55:26,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:26,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 15:55:26,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-12-13 15:55:27,049 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:55:27,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 169 transitions, 2262 flow. Second operand has 28 states, 28 states have (on average 172.64285714285714) internal successors, (4834), 28 states have internal predecessors, (4834), 0 states have call successors, (0), 0 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 15:55:27,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:27,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:55:27,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:29,837 INFO L130 PetriNetUnfolder]: 8164/14497 cut-off events. [2022-12-13 15:55:29,837 INFO L131 PetriNetUnfolder]: For 46092/46092 co-relation queries the response was YES. [2022-12-13 15:55:29,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52866 conditions, 14497 events. 8164/14497 cut-off events. For 46092/46092 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 77190 event pairs, 899 based on Foata normal form. 80/14285 useless extension candidates. Maximal degree in co-relation 51163. Up to 2965 conditions per place. [2022-12-13 15:55:29,898 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 387 selfloop transitions, 182 changer transitions 11/581 dead transitions. [2022-12-13 15:55:29,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 581 transitions, 5836 flow [2022-12-13 15:55:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 15:55:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 15:55:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6437 transitions. [2022-12-13 15:55:29,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4939379987722529 [2022-12-13 15:55:29,904 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6437 transitions. [2022-12-13 15:55:29,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6437 transitions. [2022-12-13 15:55:29,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:29,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6437 transitions. [2022-12-13 15:55:29,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 178.80555555555554) internal successors, (6437), 36 states have internal predecessors, (6437), 0 states have call successors, (0), 0 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 15:55:29,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 362.0) internal successors, (13394), 37 states have internal predecessors, (13394), 0 states have call successors, (0), 0 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 15:55:29,916 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 362.0) internal successors, (13394), 37 states have internal predecessors, (13394), 0 states have call successors, (0), 0 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 15:55:29,916 INFO L175 Difference]: Start difference. First operand has 165 places, 169 transitions, 2262 flow. Second operand 36 states and 6437 transitions. [2022-12-13 15:55:29,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 581 transitions, 5836 flow [2022-12-13 15:55:30,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 581 transitions, 5609 flow, removed 74 selfloop flow, removed 11 redundant places. [2022-12-13 15:55:30,063 INFO L231 Difference]: Finished difference. Result has 198 places, 246 transitions, 3678 flow [2022-12-13 15:55:30,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3678, PETRI_PLACES=198, PETRI_TRANSITIONS=246} [2022-12-13 15:55:30,063 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2022-12-13 15:55:30,064 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 246 transitions, 3678 flow [2022-12-13 15:55:30,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 172.64285714285714) internal successors, (4834), 28 states have internal predecessors, (4834), 0 states have call successors, (0), 0 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 15:55:30,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:30,064 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:30,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:55:30,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 15:55:30,266 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:30,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1697542771, now seen corresponding path program 1 times [2022-12-13 15:55:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:30,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220295581] [2022-12-13 15:55:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:55:30,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220295581] [2022-12-13 15:55:30,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220295581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049990092] [2022-12-13 15:55:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:30,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:30,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:30,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:30,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:55:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:30,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 15:55:30,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:55:30,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:55:31,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049990092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:31,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:31,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-12-13 15:55:31,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784282080] [2022-12-13 15:55:31,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:31,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 15:55:31,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:31,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 15:55:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:55:31,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:55:31,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 246 transitions, 3678 flow. Second operand has 26 states, 26 states have (on average 173.07692307692307) internal successors, (4500), 26 states have internal predecessors, (4500), 0 states have call successors, (0), 0 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 15:55:31,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:31,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:55:31,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:35,287 INFO L130 PetriNetUnfolder]: 12396/22001 cut-off events. [2022-12-13 15:55:35,287 INFO L131 PetriNetUnfolder]: For 82870/82870 co-relation queries the response was YES. [2022-12-13 15:55:35,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80785 conditions, 22001 events. 12396/22001 cut-off events. For 82870/82870 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 131700 event pairs, 1583 based on Foata normal form. 172/21721 useless extension candidates. Maximal degree in co-relation 79637. Up to 4601 conditions per place. [2022-12-13 15:55:35,420 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 365 selfloop transitions, 347 changer transitions 8/721 dead transitions. [2022-12-13 15:55:35,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 721 transitions, 9150 flow [2022-12-13 15:55:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 15:55:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 15:55:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5211 transitions. [2022-12-13 15:55:35,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4963802629072204 [2022-12-13 15:55:35,469 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5211 transitions. [2022-12-13 15:55:35,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5211 transitions. [2022-12-13 15:55:35,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:35,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5211 transitions. [2022-12-13 15:55:35,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 179.68965517241378) internal successors, (5211), 29 states have internal predecessors, (5211), 0 states have call successors, (0), 0 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 15:55:35,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 362.0) internal successors, (10860), 30 states have internal predecessors, (10860), 0 states have call successors, (0), 0 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 15:55:35,486 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 362.0) internal successors, (10860), 30 states have internal predecessors, (10860), 0 states have call successors, (0), 0 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 15:55:35,486 INFO L175 Difference]: Start difference. First operand has 198 places, 246 transitions, 3678 flow. Second operand 29 states and 5211 transitions. [2022-12-13 15:55:35,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 721 transitions, 9150 flow [2022-12-13 15:55:35,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 721 transitions, 8791 flow, removed 134 selfloop flow, removed 11 redundant places. [2022-12-13 15:55:35,805 INFO L231 Difference]: Finished difference. Result has 222 places, 437 transitions, 7279 flow [2022-12-13 15:55:35,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7279, PETRI_PLACES=222, PETRI_TRANSITIONS=437} [2022-12-13 15:55:35,806 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2022-12-13 15:55:35,806 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 437 transitions, 7279 flow [2022-12-13 15:55:35,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 173.07692307692307) internal successors, (4500), 26 states have internal predecessors, (4500), 0 states have call successors, (0), 0 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 15:55:35,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:35,806 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:35,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 15:55:36,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:55:36,007 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2109124739, now seen corresponding path program 5 times [2022-12-13 15:55:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672271905] [2022-12-13 15:55:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:36,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:55:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672271905] [2022-12-13 15:55:36,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672271905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539977102] [2022-12-13 15:55:36,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:55:36,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:36,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:36,432 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:36,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:55:37,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-13 15:55:37,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:37,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 15:55:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:55:37,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:55:37,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539977102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:37,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:37,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 38 [2022-12-13 15:55:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719539620] [2022-12-13 15:55:37,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:37,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 15:55:37,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 15:55:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 15:55:37,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:55:37,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 437 transitions, 7279 flow. Second operand has 40 states, 40 states have (on average 172.45) internal successors, (6898), 40 states have internal predecessors, (6898), 0 states have call successors, (0), 0 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 15:55:37,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:37,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:55:37,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:44,452 INFO L130 PetriNetUnfolder]: 16675/29510 cut-off events. [2022-12-13 15:55:44,452 INFO L131 PetriNetUnfolder]: For 139324/139324 co-relation queries the response was YES. [2022-12-13 15:55:44,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111483 conditions, 29510 events. 16675/29510 cut-off events. For 139324/139324 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 183077 event pairs, 2501 based on Foata normal form. 154/29064 useless extension candidates. Maximal degree in co-relation 109516. Up to 6180 conditions per place. [2022-12-13 15:55:44,670 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 669 selfloop transitions, 431 changer transitions 11/1112 dead transitions. [2022-12-13 15:55:44,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1112 transitions, 14463 flow [2022-12-13 15:55:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 15:55:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-13 15:55:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 8979 transitions. [2022-12-13 15:55:44,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49607734806629833 [2022-12-13 15:55:44,681 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 8979 transitions. [2022-12-13 15:55:44,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 8979 transitions. [2022-12-13 15:55:44,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:44,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 8979 transitions. [2022-12-13 15:55:44,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 179.58) internal successors, (8979), 50 states have internal predecessors, (8979), 0 states have call successors, (0), 0 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 15:55:44,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 362.0) internal successors, (18462), 51 states have internal predecessors, (18462), 0 states have call successors, (0), 0 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 15:55:44,708 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 362.0) internal successors, (18462), 51 states have internal predecessors, (18462), 0 states have call successors, (0), 0 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 15:55:44,708 INFO L175 Difference]: Start difference. First operand has 222 places, 437 transitions, 7279 flow. Second operand 50 states and 8979 transitions. [2022-12-13 15:55:44,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1112 transitions, 14463 flow [2022-12-13 15:55:45,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 1112 transitions, 13921 flow, removed 213 selfloop flow, removed 6 redundant places. [2022-12-13 15:55:45,359 INFO L231 Difference]: Finished difference. Result has 284 places, 580 transitions, 11001 flow [2022-12-13 15:55:45,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=11001, PETRI_PLACES=284, PETRI_TRANSITIONS=580} [2022-12-13 15:55:45,360 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2022-12-13 15:55:45,360 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 580 transitions, 11001 flow [2022-12-13 15:55:45,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 172.45) internal successors, (6898), 40 states have internal predecessors, (6898), 0 states have call successors, (0), 0 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 15:55:45,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:45,361 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:45,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:55:45,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:45,562 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:55:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1399203839, now seen corresponding path program 2 times [2022-12-13 15:55:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:45,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96177368] [2022-12-13 15:55:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:45,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:55:46,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:46,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96177368] [2022-12-13 15:55:46,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96177368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:46,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851754277] [2022-12-13 15:55:46,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:55:46,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:46,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:46,071 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:46,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:55:46,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:55:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:46,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:55:46,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:55:46,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:55:46,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851754277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:46,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:46,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2022-12-13 15:55:46,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949226540] [2022-12-13 15:55:46,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:46,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 15:55:46,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 15:55:46,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 15:55:46,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:55:46,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 580 transitions, 11001 flow. Second operand has 38 states, 38 states have (on average 172.73684210526315) internal successors, (6564), 38 states have internal predecessors, (6564), 0 states have call successors, (0), 0 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 15:55:46,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:46,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:55:46,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:58,710 INFO L130 PetriNetUnfolder]: 25459/45078 cut-off events. [2022-12-13 15:55:58,711 INFO L131 PetriNetUnfolder]: For 251724/251724 co-relation queries the response was YES. [2022-12-13 15:55:59,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173762 conditions, 45078 events. 25459/45078 cut-off events. For 251724/251724 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 298332 event pairs, 3093 based on Foata normal form. 208/44342 useless extension candidates. Maximal degree in co-relation 171684. Up to 9572 conditions per place. [2022-12-13 15:55:59,127 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 565 selfloop transitions, 850 changer transitions 14/1430 dead transitions. [2022-12-13 15:55:59,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1430 transitions, 22797 flow [2022-12-13 15:55:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 15:55:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-13 15:55:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 8412 transitions. [2022-12-13 15:55:59,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49441636299518044 [2022-12-13 15:55:59,134 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 8412 transitions. [2022-12-13 15:55:59,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 8412 transitions. [2022-12-13 15:55:59,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:59,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 8412 transitions. [2022-12-13 15:55:59,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 178.9787234042553) internal successors, (8412), 47 states have internal predecessors, (8412), 0 states have call successors, (0), 0 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 15:55:59,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 362.0) internal successors, (17376), 48 states have internal predecessors, (17376), 0 states have call successors, (0), 0 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 15:55:59,153 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 362.0) internal successors, (17376), 48 states have internal predecessors, (17376), 0 states have call successors, (0), 0 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 15:55:59,153 INFO L175 Difference]: Start difference. First operand has 284 places, 580 transitions, 11001 flow. Second operand 47 states and 8412 transitions. [2022-12-13 15:55:59,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1430 transitions, 22797 flow [2022-12-13 15:56:00,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1430 transitions, 22064 flow, removed 247 selfloop flow, removed 17 redundant places. [2022-12-13 15:56:00,858 INFO L231 Difference]: Finished difference. Result has 325 places, 977 transitions, 20083 flow [2022-12-13 15:56:00,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=10359, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=20083, PETRI_PLACES=325, PETRI_TRANSITIONS=977} [2022-12-13 15:56:00,859 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2022-12-13 15:56:00,859 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 977 transitions, 20083 flow [2022-12-13 15:56:00,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 172.73684210526315) internal successors, (6564), 38 states have internal predecessors, (6564), 0 states have call successors, (0), 0 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 15:56:00,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:00,860 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:00,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 15:56:01,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:01,061 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:56:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:01,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1547749331, now seen corresponding path program 3 times [2022-12-13 15:56:01,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:01,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763208098] [2022-12-13 15:56:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:01,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:56:01,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763208098] [2022-12-13 15:56:01,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763208098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:56:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730729995] [2022-12-13 15:56:01,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:56:01,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:56:01,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:56:01,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:56:03,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-13 15:56:03,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:56:03,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 15:56:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:56:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:56:03,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:56:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:56:03,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730729995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:56:03,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:56:03,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 44 [2022-12-13 15:56:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871842880] [2022-12-13 15:56:03,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:56:03,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 15:56:03,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 15:56:03,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 15:56:03,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:56:03,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 977 transitions, 20083 flow. Second operand has 46 states, 46 states have (on average 172.6086956521739) internal successors, (7940), 46 states have internal predecessors, (7940), 0 states have call successors, (0), 0 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 15:56:03,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:03,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:56:03,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:28,884 INFO L130 PetriNetUnfolder]: 41635/73768 cut-off events. [2022-12-13 15:56:28,884 INFO L131 PetriNetUnfolder]: For 481834/481834 co-relation queries the response was YES. [2022-12-13 15:56:29,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292968 conditions, 73768 events. 41635/73768 cut-off events. For 481834/481834 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 528932 event pairs, 5531 based on Foata normal form. 360/72540 useless extension candidates. Maximal degree in co-relation 290621. Up to 15802 conditions per place. [2022-12-13 15:56:29,721 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 779 selfloop transitions, 1478 changer transitions 15/2273 dead transitions. [2022-12-13 15:56:29,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 2273 transitions, 41855 flow [2022-12-13 15:56:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 15:56:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-13 15:56:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 10041 transitions. [2022-12-13 15:56:29,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49531373322809785 [2022-12-13 15:56:29,728 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 10041 transitions. [2022-12-13 15:56:29,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 10041 transitions. [2022-12-13 15:56:29,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:29,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 10041 transitions. [2022-12-13 15:56:29,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 179.30357142857142) internal successors, (10041), 56 states have internal predecessors, (10041), 0 states have call successors, (0), 0 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 15:56:29,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 362.0) internal successors, (20634), 57 states have internal predecessors, (20634), 0 states have call successors, (0), 0 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 15:56:29,750 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 362.0) internal successors, (20634), 57 states have internal predecessors, (20634), 0 states have call successors, (0), 0 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 15:56:29,750 INFO L175 Difference]: Start difference. First operand has 325 places, 977 transitions, 20083 flow. Second operand 56 states and 10041 transitions. [2022-12-13 15:56:29,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 2273 transitions, 41855 flow [2022-12-13 15:56:34,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 2273 transitions, 40308 flow, removed 620 selfloop flow, removed 11 redundant places. [2022-12-13 15:56:34,752 INFO L231 Difference]: Finished difference. Result has 388 places, 1689 transitions, 38120 flow [2022-12-13 15:56:34,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=19074, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=38120, PETRI_PLACES=388, PETRI_TRANSITIONS=1689} [2022-12-13 15:56:34,753 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2022-12-13 15:56:34,753 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1689 transitions, 38120 flow [2022-12-13 15:56:34,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 172.6086956521739) internal successors, (7940), 46 states have internal predecessors, (7940), 0 states have call successors, (0), 0 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 15:56:34,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:34,754 INFO L209 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:34,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:56:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:34,955 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:56:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2080023005, now seen corresponding path program 4 times [2022-12-13 15:56:34,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:34,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012182000] [2022-12-13 15:56:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:34,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 681 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:56:35,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:35,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012182000] [2022-12-13 15:56:35,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012182000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:56:35,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946989090] [2022-12-13 15:56:35,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:56:35,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:35,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:56:35,562 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:56:35,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:56:35,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:56:35,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:56:35,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 15:56:35,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:56:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 681 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:56:35,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:56:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 681 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:56:36,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946989090] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:56:36,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:56:36,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 52 [2022-12-13 15:56:36,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128261143] [2022-12-13 15:56:36,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:56:36,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 15:56:36,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:36,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 15:56:36,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2198, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 15:56:36,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:56:36,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1689 transitions, 38120 flow. Second operand has 54 states, 54 states have (on average 172.5185185185185) internal successors, (9316), 54 states have internal predecessors, (9316), 0 states have call successors, (0), 0 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 15:56:36,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:36,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:56:36,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:34,015 INFO L130 PetriNetUnfolder]: 58906/104259 cut-off events. [2022-12-13 15:57:34,015 INFO L131 PetriNetUnfolder]: For 821314/821314 co-relation queries the response was YES. [2022-12-13 15:57:35,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428572 conditions, 104259 events. 58906/104259 cut-off events. For 821314/821314 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 787117 event pairs, 6639 based on Foata normal form. 460/102463 useless extension candidates. Maximal degree in co-relation 425778. Up to 22367 conditions per place. [2022-12-13 15:57:35,563 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 860 selfloop transitions, 2264 changer transitions 23/3148 dead transitions. [2022-12-13 15:57:35,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 3148 transitions, 64717 flow [2022-12-13 15:57:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-13 15:57:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-12-13 15:57:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 12857 transitions. [2022-12-13 15:57:35,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4932857581338244 [2022-12-13 15:57:35,574 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 12857 transitions. [2022-12-13 15:57:35,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 12857 transitions. [2022-12-13 15:57:35,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:35,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 12857 transitions. [2022-12-13 15:57:35,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 178.56944444444446) internal successors, (12857), 72 states have internal predecessors, (12857), 0 states have call successors, (0), 0 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 15:57:35,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 362.0) internal successors, (26426), 73 states have internal predecessors, (26426), 0 states have call successors, (0), 0 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 15:57:35,606 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 362.0) internal successors, (26426), 73 states have internal predecessors, (26426), 0 states have call successors, (0), 0 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 15:57:35,606 INFO L175 Difference]: Start difference. First operand has 388 places, 1689 transitions, 38120 flow. Second operand 72 states and 12857 transitions. [2022-12-13 15:57:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 3148 transitions, 64717 flow [2022-12-13 15:57:47,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 3148 transitions, 62264 flow, removed 983 selfloop flow, removed 11 redundant places. [2022-12-13 15:57:47,166 INFO L231 Difference]: Finished difference. Result has 463 places, 2466 transitions, 59988 flow [2022-12-13 15:57:47,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=36620, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=59988, PETRI_PLACES=463, PETRI_TRANSITIONS=2466} [2022-12-13 15:57:47,168 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2022-12-13 15:57:47,168 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 2466 transitions, 59988 flow [2022-12-13 15:57:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 172.5185185185185) internal successors, (9316), 54 states have internal predecessors, (9316), 0 states have call successors, (0), 0 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 15:57:47,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:47,169 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:47,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:57:47,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:57:47,370 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-12-13 15:57:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1601663077, now seen corresponding path program 5 times [2022-12-13 15:57:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730704315] [2022-12-13 15:57:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:47,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 15:57:47,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:47,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730704315] [2022-12-13 15:57:47,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730704315] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:57:47,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197749693] [2022-12-13 15:57:47,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:57:47,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:57:47,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:57:47,910 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:57:47,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb01299-2933-49f6-9b62-180c7697a67c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:57:48,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-13 15:57:48,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:57:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 15:57:48,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:57:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 15:57:48,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:57:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 15:57:48,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197749693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:57:48,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:57:48,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 34 [2022-12-13 15:57:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246580171] [2022-12-13 15:57:48,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:57:48,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 15:57:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 15:57:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 15:57:49,023 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2022-12-13 15:57:49,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 2466 transitions, 59988 flow. Second operand has 36 states, 36 states have (on average 173.61111111111111) internal successors, (6250), 36 states have internal predecessors, (6250), 0 states have call successors, (0), 0 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 15:57:49,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:49,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2022-12-13 15:57:49,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:02:06,513 INFO L130 PetriNetUnfolder]: 193543/344850 cut-off events. [2022-12-13 16:02:06,514 INFO L131 PetriNetUnfolder]: For 2747714/2747714 co-relation queries the response was YES. [2022-12-13 16:02:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1424626 conditions, 344850 events. 193543/344850 cut-off events. For 2747714/2747714 co-relation queries the response was YES. Maximal size of possible extension queue 2759. Compared 3180517 event pairs, 29925 based on Foata normal form. 3174/340048 useless extension candidates. Maximal degree in co-relation 1421728. Up to 75344 conditions per place. [2022-12-13 16:02:13,294 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 1143 selfloop transitions, 8167 changer transitions 12/9323 dead transitions. [2022-12-13 16:02:13,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 9323 transitions, 232651 flow [2022-12-13 16:02:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 16:02:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 16:02:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 7002 transitions. [2022-12-13 16:02:13,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4959626009349766 [2022-12-13 16:02:13,299 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 7002 transitions. [2022-12-13 16:02:13,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 7002 transitions. [2022-12-13 16:02:13,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:02:13,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 7002 transitions. [2022-12-13 16:02:13,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 179.53846153846155) internal successors, (7002), 39 states have internal predecessors, (7002), 0 states have call successors, (0), 0 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 16:02:13,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 362.0) internal successors, (14480), 40 states have internal predecessors, (14480), 0 states have call successors, (0), 0 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 16:02:13,312 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 362.0) internal successors, (14480), 40 states have internal predecessors, (14480), 0 states have call successors, (0), 0 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 16:02:13,312 INFO L175 Difference]: Start difference. First operand has 463 places, 2466 transitions, 59988 flow. Second operand 39 states and 7002 transitions. [2022-12-13 16:02:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 9323 transitions, 232651 flow