./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R --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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- 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-38b53e6 [2022-11-25 17:52:11,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:52:11,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:52:11,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:52:11,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:52:11,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:52:11,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:52:11,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:52:11,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:52:11,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:52:11,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:52:11,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:52:11,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:52:11,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:52:11,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:52:11,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:52:11,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:52:11,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:52:11,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:52:11,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:52:11,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:52:11,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:52:12,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:52:12,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:52:12,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:52:12,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:52:12,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:52:12,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:52:12,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:52:12,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:52:12,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:52:12,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:52:12,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:52:12,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:52:12,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:52:12,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:52:12,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:52:12,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:52:12,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:52:12,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:52:12,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:52:12,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 17:52:12,077 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:52:12,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:52:12,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:52:12,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:52:12,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:52:12,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:52:12,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:52:12,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:52:12,082 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:52:12,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:52:12,083 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:52:12,084 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:52:12,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:52:12,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:52:12,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:52:12,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:52:12,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:52:12,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:52:12,086 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 17:52:12,086 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:52:12,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:52:12,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:52:12,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:52:12,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:52:12,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:52:12,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:52:12,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:52:12,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:52:12,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:52:12,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:52:12,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:52:12,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:52:12,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:52:12,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:52:12,092 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:52:12,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:52:12,092 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_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2022-11-25 17:52:12,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:52:12,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:52:12,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:52:12,423 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:52:12,423 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:52:12,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-25 17:52:15,636 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:52:15,892 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:52:15,892 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-25 17:52:15,901 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/data/e3e31390f/8be6a7e6538d43c28a15ad6231a340f8/FLAG7e958b1e4 [2022-11-25 17:52:15,919 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/data/e3e31390f/8be6a7e6538d43c28a15ad6231a340f8 [2022-11-25 17:52:15,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:52:15,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:52:15,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:52:15,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:52:15,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:52:15,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:15" (1/1) ... [2022-11-25 17:52:15,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2210fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:15, skipping insertion in model container [2022-11-25 17:52:15,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:15" (1/1) ... [2022-11-25 17:52:15,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:52:15,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:52:16,168 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:16,171 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:16,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:16,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:16,178 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:16,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:16,190 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_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-25 17:52:16,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:52:16,210 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:52:16,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:16,227 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:16,228 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:16,230 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:16,231 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:16,233 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:16,239 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_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-25 17:52:16,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:52:16,261 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:52:16,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16 WrapperNode [2022-11-25 17:52:16,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:52:16,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:52:16,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:52:16,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:52:16,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,313 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 166 [2022-11-25 17:52:16,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:52:16,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:52:16,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:52:16,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:52:16,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,348 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:52:16,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:52:16,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:52:16,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:52:16,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:52:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:16,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:52:16,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:52:16,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:52:16,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:52:16,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:52:16,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:52:16,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:52:16,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:52:16,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:52:16,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:52:16,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:52:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:52:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:52:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:52:16,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:52:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:52:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:52:16,452 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:52:16,561 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:52:16,563 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:52:17,012 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:52:17,175 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:52:17,175 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:52:17,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:17 BoogieIcfgContainer [2022-11-25 17:52:17,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:52:17,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:52:17,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:52:17,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:52:17,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:52:15" (1/3) ... [2022-11-25 17:52:17,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b23915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:17, skipping insertion in model container [2022-11-25 17:52:17,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16" (2/3) ... [2022-11-25 17:52:17,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b23915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:17, skipping insertion in model container [2022-11-25 17:52:17,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:17" (3/3) ... [2022-11-25 17:52:17,190 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-11-25 17:52:17,209 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:52:17,227 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:52:17,227 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-25 17:52:17,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:52:17,348 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:52:17,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 153 transitions, 322 flow [2022-11-25 17:52:17,536 INFO L130 PetriNetUnfolder]: 11/151 cut-off events. [2022-11-25 17:52:17,536 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:52:17,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 151 events. 11/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2022-11-25 17:52:17,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 153 transitions, 322 flow [2022-11-25 17:52:17,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 132 transitions, 273 flow [2022-11-25 17:52:17,552 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:52:17,569 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 132 transitions, 273 flow [2022-11-25 17:52:17,572 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 132 transitions, 273 flow [2022-11-25 17:52:17,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 132 transitions, 273 flow [2022-11-25 17:52:17,633 INFO L130 PetriNetUnfolder]: 10/132 cut-off events. [2022-11-25 17:52:17,638 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:52:17,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 132 events. 10/132 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 134 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2022-11-25 17:52:17,644 INFO L119 LiptonReduction]: Number of co-enabled transitions 1142 [2022-11-25 17:52:25,077 INFO L134 LiptonReduction]: Checked pairs total: 1360 [2022-11-25 17:52:25,078 INFO L136 LiptonReduction]: Total number of compositions: 145 [2022-11-25 17:52:25,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:52:25,104 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;@7e5f8587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:52:25,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-11-25 17:52:25,107 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:52:25,107 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:52:25,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:25,108 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:52:25,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash 22715, now seen corresponding path program 1 times [2022-11-25 17:52:25,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:25,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003425424] [2022-11-25 17:52:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:25,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:25,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:25,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003425424] [2022-11-25 17:52:25,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003425424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:25,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:25,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:52:25,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009969168] [2022-11-25 17:52:25,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:25,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:25,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:25,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:25,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:25,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 298 [2022-11-25 17:52:25,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:25,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:25,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 298 [2022-11-25 17:52:25,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:25,697 INFO L130 PetriNetUnfolder]: 469/695 cut-off events. [2022-11-25 17:52:25,697 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 17:52:25,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 695 events. 469/695 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 3126 event pairs, 218 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 628. Up to 342 conditions per place. [2022-11-25 17:52:25,704 INFO L137 encePairwiseOnDemand]: 291/298 looper letters, 39 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-25 17:52:25,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 186 flow [2022-11-25 17:52:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2022-11-25 17:52:25,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4843400447427293 [2022-11-25 17:52:25,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2022-11-25 17:52:25,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2022-11-25 17:52:25,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:25,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2022-11-25 17:52:25,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:25,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:25,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:25,752 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 433 transitions. [2022-11-25 17:52:25,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 186 flow [2022-11-25 17:52:25,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:25,762 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 66 flow [2022-11-25 17:52:25,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-11-25 17:52:25,769 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2022-11-25 17:52:25,771 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 66 flow [2022-11-25 17:52:25,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:25,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:25,777 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:52:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:52:25,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:25,789 INFO L85 PathProgramCache]: Analyzing trace with hash 705639, now seen corresponding path program 1 times [2022-11-25 17:52:25,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:25,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715082811] [2022-11-25 17:52:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:25,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:25,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715082811] [2022-11-25 17:52:25,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715082811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874096805] [2022-11-25 17:52:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:25,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:25,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:25,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:25,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:52:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:26,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:52:26,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:26,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:26,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874096805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:26,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:26,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 17:52:26,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379818116] [2022-11-25 17:52:26,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:26,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:26,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:52:26,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 298 [2022-11-25 17:52:26,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 129.14285714285714) internal successors, (904), 7 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:26,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:26,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 298 [2022-11-25 17:52:26,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:26,699 INFO L130 PetriNetUnfolder]: 1174/1736 cut-off events. [2022-11-25 17:52:26,700 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-25 17:52:26,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3523 conditions, 1736 events. 1174/1736 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 9172 event pairs, 545 based on Foata normal form. 0/606 useless extension candidates. Maximal degree in co-relation 2815. Up to 341 conditions per place. [2022-11-25 17:52:26,714 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 92 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2022-11-25 17:52:26,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 103 transitions, 452 flow [2022-11-25 17:52:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:52:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:52:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1000 transitions. [2022-11-25 17:52:26,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4793863854266539 [2022-11-25 17:52:26,718 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1000 transitions. [2022-11-25 17:52:26,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1000 transitions. [2022-11-25 17:52:26,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:26,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1000 transitions. [2022-11-25 17:52:26,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.85714285714286) internal successors, (1000), 7 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:26,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 298.0) internal successors, (2384), 8 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:26,729 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 298.0) internal successors, (2384), 8 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:26,729 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 66 flow. Second operand 7 states and 1000 transitions. [2022-11-25 17:52:26,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 103 transitions, 452 flow [2022-11-25 17:52:26,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 103 transitions, 450 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:26,734 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 123 flow [2022-11-25 17:52:26,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-11-25 17:52:26,735 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2022-11-25 17:52:26,735 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 123 flow [2022-11-25 17:52:26,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.14285714285714) internal successors, (904), 7 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:26,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:26,737 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-25 17:52:26,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:26,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:26,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash 21875483, now seen corresponding path program 1 times [2022-11-25 17:52:26,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:26,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916095720] [2022-11-25 17:52:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:26,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:27,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:27,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916095720] [2022-11-25 17:52:27,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916095720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:27,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151544090] [2022-11-25 17:52:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:27,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:27,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:27,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:52:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:27,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:52:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:27,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:27,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151544090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:27,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:27,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 17:52:27,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432697734] [2022-11-25 17:52:27,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:27,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:52:27,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:27,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:52:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:52:27,248 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 298 [2022-11-25 17:52:27,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:27,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:27,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 298 [2022-11-25 17:52:27,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:27,683 INFO L130 PetriNetUnfolder]: 1171/1732 cut-off events. [2022-11-25 17:52:27,683 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:52:27,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3525 conditions, 1732 events. 1171/1732 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 9034 event pairs, 545 based on Foata normal form. 2/609 useless extension candidates. Maximal degree in co-relation 2105. Up to 1016 conditions per place. [2022-11-25 17:52:27,696 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 58 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2022-11-25 17:52:27,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 63 transitions, 298 flow [2022-11-25 17:52:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:52:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:52:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 701 transitions. [2022-11-25 17:52:27,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4704697986577181 [2022-11-25 17:52:27,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 701 transitions. [2022-11-25 17:52:27,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 701 transitions. [2022-11-25 17:52:27,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:27,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 701 transitions. [2022-11-25 17:52:27,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:27,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:27,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:27,708 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 123 flow. Second operand 5 states and 701 transitions. [2022-11-25 17:52:27,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 63 transitions, 298 flow [2022-11-25 17:52:27,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 63 transitions, 290 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:27,710 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 94 flow [2022-11-25 17:52:27,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2022-11-25 17:52:27,712 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2022-11-25 17:52:27,712 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 94 flow [2022-11-25 17:52:27,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:27,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:27,713 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:52:27,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:27,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:27,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash 678332033, now seen corresponding path program 1 times [2022-11-25 17:52:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:27,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054052798] [2022-11-25 17:52:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:27,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:28,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:28,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054052798] [2022-11-25 17:52:28,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054052798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:28,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:28,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:52:28,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860780968] [2022-11-25 17:52:28,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:28,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:52:28,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:52:28,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:52:28,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 298 [2022-11-25 17:52:28,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:28,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:28,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 298 [2022-11-25 17:52:28,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:28,486 INFO L130 PetriNetUnfolder]: 937/1394 cut-off events. [2022-11-25 17:52:28,486 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:52:28,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 1394 events. 937/1394 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 7163 event pairs, 436 based on Foata normal form. 6/500 useless extension candidates. Maximal degree in co-relation 2801. Up to 1355 conditions per place. [2022-11-25 17:52:28,497 INFO L137 encePairwiseOnDemand]: 284/298 looper letters, 23 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2022-11-25 17:52:28,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 167 flow [2022-11-25 17:52:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:52:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:52:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 538 transitions. [2022-11-25 17:52:28,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4513422818791946 [2022-11-25 17:52:28,500 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 538 transitions. [2022-11-25 17:52:28,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 538 transitions. [2022-11-25 17:52:28,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:28,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 538 transitions. [2022-11-25 17:52:28,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:28,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:28,506 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:28,506 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 94 flow. Second operand 4 states and 538 transitions. [2022-11-25 17:52:28,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 167 flow [2022-11-25 17:52:28,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:28,508 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 119 flow [2022-11-25 17:52:28,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2022-11-25 17:52:28,509 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2022-11-25 17:52:28,509 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 119 flow [2022-11-25 17:52:28,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:28,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:28,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:52:28,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:52:28,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash -452260338, now seen corresponding path program 1 times [2022-11-25 17:52:28,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898220134] [2022-11-25 17:52:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:28,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:28,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898220134] [2022-11-25 17:52:28,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898220134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:28,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463350284] [2022-11-25 17:52:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:28,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:28,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:28,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:52:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:28,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:52:28,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:28,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:28,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463350284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:28,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:28,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-25 17:52:28,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472407643] [2022-11-25 17:52:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:28,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:28,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:52:28,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 298 [2022-11-25 17:52:28,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:28,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:28,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 298 [2022-11-25 17:52:28,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:28,995 INFO L130 PetriNetUnfolder]: 545/835 cut-off events. [2022-11-25 17:52:28,995 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2022-11-25 17:52:28,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 835 events. 545/835 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 3984 event pairs, 248 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 2343. Up to 811 conditions per place. [2022-11-25 17:52:29,002 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 21 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-11-25 17:52:29,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 24 transitions, 151 flow [2022-11-25 17:52:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2022-11-25 17:52:29,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4563758389261745 [2022-11-25 17:52:29,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2022-11-25 17:52:29,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2022-11-25 17:52:29,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:29,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2022-11-25 17:52:29,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,010 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 119 flow. Second operand 3 states and 408 transitions. [2022-11-25 17:52:29,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 24 transitions, 151 flow [2022-11-25 17:52:29,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 24 transitions, 145 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:29,012 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 103 flow [2022-11-25 17:52:29,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2022-11-25 17:52:29,013 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2022-11-25 17:52:29,014 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 103 flow [2022-11-25 17:52:29,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:29,014 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:52:29,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:29,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:29,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:29,221 INFO L85 PathProgramCache]: Analyzing trace with hash -452260290, now seen corresponding path program 1 times [2022-11-25 17:52:29,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:29,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016794135] [2022-11-25 17:52:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:29,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:29,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:29,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016794135] [2022-11-25 17:52:29,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016794135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:29,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:29,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:52:29,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464882564] [2022-11-25 17:52:29,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:29,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:29,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:29,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:29,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 298 [2022-11-25 17:52:29,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:29,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 298 [2022-11-25 17:52:29,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:29,550 INFO L130 PetriNetUnfolder]: 725/1151 cut-off events. [2022-11-25 17:52:29,550 INFO L131 PetriNetUnfolder]: For 116/164 co-relation queries the response was YES. [2022-11-25 17:52:29,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 1151 events. 725/1151 cut-off events. For 116/164 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 6124 event pairs, 268 based on Foata normal form. 0/551 useless extension candidates. Maximal degree in co-relation 3187. Up to 817 conditions per place. [2022-11-25 17:52:29,559 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 32 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-11-25 17:52:29,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 208 flow [2022-11-25 17:52:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2022-11-25 17:52:29,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46868008948545864 [2022-11-25 17:52:29,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2022-11-25 17:52:29,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2022-11-25 17:52:29,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:29,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2022-11-25 17:52:29,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,567 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 103 flow. Second operand 3 states and 419 transitions. [2022-11-25 17:52:29,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 208 flow [2022-11-25 17:52:29,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:29,572 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 118 flow [2022-11-25 17:52:29,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2022-11-25 17:52:29,575 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2022-11-25 17:52:29,575 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 118 flow [2022-11-25 17:52:29,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:29,576 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:52:29,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:52:29,577 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash -452450924, now seen corresponding path program 2 times [2022-11-25 17:52:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:29,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110391507] [2022-11-25 17:52:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:29,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110391507] [2022-11-25 17:52:29,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110391507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638642164] [2022-11-25 17:52:29,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:29,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:29,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:29,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:52:29,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:52:29,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:29,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:52:29,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:52:29,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:29,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638642164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:29,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:29,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 17:52:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859964828] [2022-11-25 17:52:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:29,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:29,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:29,823 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 298 [2022-11-25 17:52:29,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:29,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:29,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 298 [2022-11-25 17:52:29,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:30,023 INFO L130 PetriNetUnfolder]: 597/978 cut-off events. [2022-11-25 17:52:30,023 INFO L131 PetriNetUnfolder]: For 376/440 co-relation queries the response was YES. [2022-11-25 17:52:30,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 978 events. 597/978 cut-off events. For 376/440 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 5241 event pairs, 344 based on Foata normal form. 41/587 useless extension candidates. Maximal degree in co-relation 2937. Up to 958 conditions per place. [2022-11-25 17:52:30,031 INFO L137 encePairwiseOnDemand]: 296/298 looper letters, 21 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-11-25 17:52:30,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 24 transitions, 152 flow [2022-11-25 17:52:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2022-11-25 17:52:30,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45302013422818793 [2022-11-25 17:52:30,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2022-11-25 17:52:30,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2022-11-25 17:52:30,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:30,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2022-11-25 17:52:30,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:30,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:30,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:30,038 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 118 flow. Second operand 3 states and 405 transitions. [2022-11-25 17:52:30,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 24 transitions, 152 flow [2022-11-25 17:52:30,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 140 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 17:52:30,040 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 98 flow [2022-11-25 17:52:30,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2022-11-25 17:52:30,041 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-11-25 17:52:30,041 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 98 flow [2022-11-25 17:52:30,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:30,041 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:30,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:30,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:30,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:30,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1135165255, now seen corresponding path program 1 times [2022-11-25 17:52:30,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:30,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956956070] [2022-11-25 17:52:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:30,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956956070] [2022-11-25 17:52:30,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956956070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506743481] [2022-11-25 17:52:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:30,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:30,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:30,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:30,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:52:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:52:30,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:30,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:30,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506743481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:30,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:30,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:52:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162978391] [2022-11-25 17:52:30,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:30,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:30,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:52:30,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 298 [2022-11-25 17:52:30,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 98 flow. Second operand has 7 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:30,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:30,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 298 [2022-11-25 17:52:30,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:31,024 INFO L130 PetriNetUnfolder]: 1613/2446 cut-off events. [2022-11-25 17:52:31,024 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2022-11-25 17:52:31,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7348 conditions, 2446 events. 1613/2446 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 13532 event pairs, 148 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 7336. Up to 1825 conditions per place. [2022-11-25 17:52:31,045 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 67 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2022-11-25 17:52:31,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 77 transitions, 442 flow [2022-11-25 17:52:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:52:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:52:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 978 transitions. [2022-11-25 17:52:31,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46883988494726747 [2022-11-25 17:52:31,049 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 978 transitions. [2022-11-25 17:52:31,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 978 transitions. [2022-11-25 17:52:31,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:31,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 978 transitions. [2022-11-25 17:52:31,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 298.0) internal successors, (2384), 8 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,058 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 298.0) internal successors, (2384), 8 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,059 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 98 flow. Second operand 7 states and 978 transitions. [2022-11-25 17:52:31,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 77 transitions, 442 flow [2022-11-25 17:52:31,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 77 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:31,062 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 168 flow [2022-11-25 17:52:31,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2022-11-25 17:52:31,063 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2022-11-25 17:52:31,063 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 168 flow [2022-11-25 17:52:31,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:31,064 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:31,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:31,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:31,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash -830383234, now seen corresponding path program 1 times [2022-11-25 17:52:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:31,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997811385] [2022-11-25 17:52:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:31,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:31,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997811385] [2022-11-25 17:52:31,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997811385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691712414] [2022-11-25 17:52:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:31,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:31,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:31,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:31,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:52:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:52:31,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:31,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691712414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:31,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:31,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-11-25 17:52:31,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084032924] [2022-11-25 17:52:31,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:31,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:52:31,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:52:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:52:31,808 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 298 [2022-11-25 17:52:31,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 168 flow. Second operand has 12 states, 12 states have (on average 122.5) internal successors, (1470), 12 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:31,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 298 [2022-11-25 17:52:31,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:32,262 INFO L130 PetriNetUnfolder]: 1175/1817 cut-off events. [2022-11-25 17:52:32,263 INFO L131 PetriNetUnfolder]: For 1817/1897 co-relation queries the response was YES. [2022-11-25 17:52:32,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6087 conditions, 1817 events. 1175/1817 cut-off events. For 1817/1897 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9700 event pairs, 608 based on Foata normal form. 132/1251 useless extension candidates. Maximal degree in co-relation 6072. Up to 1694 conditions per place. [2022-11-25 17:52:32,279 INFO L137 encePairwiseOnDemand]: 288/298 looper letters, 37 selfloop transitions, 9 changer transitions 2/50 dead transitions. [2022-11-25 17:52:32,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 337 flow [2022-11-25 17:52:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:52:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:52:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 768 transitions. [2022-11-25 17:52:32,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42953020134228187 [2022-11-25 17:52:32,283 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 768 transitions. [2022-11-25 17:52:32,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 768 transitions. [2022-11-25 17:52:32,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:32,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 768 transitions. [2022-11-25 17:52:32,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,318 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,318 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 168 flow. Second operand 6 states and 768 transitions. [2022-11-25 17:52:32,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 337 flow [2022-11-25 17:52:32,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 322 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:32,323 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 236 flow [2022-11-25 17:52:32,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2022-11-25 17:52:32,324 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2022-11-25 17:52:32,324 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 236 flow [2022-11-25 17:52:32,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 122.5) internal successors, (1470), 12 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:32,325 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:32,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:32,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 17:52:32,532 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash -825682641, now seen corresponding path program 1 times [2022-11-25 17:52:32,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:32,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820525020] [2022-11-25 17:52:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:32,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:32,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:32,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820525020] [2022-11-25 17:52:32,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820525020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:32,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:32,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:52:32,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232792649] [2022-11-25 17:52:32,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:32,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:32,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:32,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 298 [2022-11-25 17:52:32,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:32,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 298 [2022-11-25 17:52:32,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:33,055 INFO L130 PetriNetUnfolder]: 1142/1755 cut-off events. [2022-11-25 17:52:33,055 INFO L131 PetriNetUnfolder]: For 1319/1335 co-relation queries the response was YES. [2022-11-25 17:52:33,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6932 conditions, 1755 events. 1142/1755 cut-off events. For 1319/1335 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 8912 event pairs, 344 based on Foata normal form. 24/1087 useless extension candidates. Maximal degree in co-relation 6912. Up to 1722 conditions per place. [2022-11-25 17:52:33,078 INFO L137 encePairwiseOnDemand]: 291/298 looper letters, 30 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2022-11-25 17:52:33,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 37 transitions, 298 flow [2022-11-25 17:52:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2022-11-25 17:52:33,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44854586129753915 [2022-11-25 17:52:33,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2022-11-25 17:52:33,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2022-11-25 17:52:33,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:33,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2022-11-25 17:52:33,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,086 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 236 flow. Second operand 3 states and 401 transitions. [2022-11-25 17:52:33,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 37 transitions, 298 flow [2022-11-25 17:52:33,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 284 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:33,092 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 231 flow [2022-11-25 17:52:33,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2022-11-25 17:52:33,094 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2022-11-25 17:52:33,094 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 231 flow [2022-11-25 17:52:33,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:33,096 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-25 17:52:33,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:52:33,096 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1174172463, now seen corresponding path program 2 times [2022-11-25 17:52:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:33,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133005461] [2022-11-25 17:52:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:33,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:33,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133005461] [2022-11-25 17:52:33,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133005461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203431107] [2022-11-25 17:52:33,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:33,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:33,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:33,351 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:33,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:52:33,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:52:33,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:52:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:52:33,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:33,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203431107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:33,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:33,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-11-25 17:52:33,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020027580] [2022-11-25 17:52:33,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:33,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:52:33,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:52:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:52:33,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 298 [2022-11-25 17:52:33,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:33,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 298 [2022-11-25 17:52:33,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:33,834 INFO L130 PetriNetUnfolder]: 977/1566 cut-off events. [2022-11-25 17:52:33,835 INFO L131 PetriNetUnfolder]: For 1432/1432 co-relation queries the response was YES. [2022-11-25 17:52:33,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6973 conditions, 1566 events. 977/1566 cut-off events. For 1432/1432 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 8505 event pairs, 80 based on Foata normal form. 72/1062 useless extension candidates. Maximal degree in co-relation 6952. Up to 1117 conditions per place. [2022-11-25 17:52:33,848 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 46 selfloop transitions, 4 changer transitions 1/52 dead transitions. [2022-11-25 17:52:33,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 410 flow [2022-11-25 17:52:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:52:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:52:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2022-11-25 17:52:33,851 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46241610738255035 [2022-11-25 17:52:33,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2022-11-25 17:52:33,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2022-11-25 17:52:33,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:33,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2022-11-25 17:52:33,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,857 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,857 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 231 flow. Second operand 5 states and 689 transitions. [2022-11-25 17:52:33,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 410 flow [2022-11-25 17:52:33,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 369 flow, removed 18 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:33,864 INFO L231 Difference]: Finished difference. Result has 49 places, 30 transitions, 185 flow [2022-11-25 17:52:33,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=49, PETRI_TRANSITIONS=30} [2022-11-25 17:52:33,865 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2022-11-25 17:52:33,866 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 30 transitions, 185 flow [2022-11-25 17:52:33,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:33,867 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:33,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:34,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:34,073 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1087377543, now seen corresponding path program 1 times [2022-11-25 17:52:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701009610] [2022-11-25 17:52:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:34,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:34,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:34,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701009610] [2022-11-25 17:52:34,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701009610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:34,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958658070] [2022-11-25 17:52:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:34,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:34,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:34,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:52:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:52:34,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:34,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:52:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:34,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:52:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:35,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:52:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:35,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:37,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:37,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-25 17:52:37,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:37,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 161 [2022-11-25 17:52:37,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 134 [2022-11-25 17:52:37,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-25 17:52:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:37,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958658070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:37,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:37,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2022-11-25 17:52:37,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259903872] [2022-11-25 17:52:37,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:37,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:52:37,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:52:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2022-11-25 17:52:38,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 298 [2022-11-25 17:52:38,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 30 transitions, 185 flow. Second operand has 16 states, 16 states have (on average 107.5) internal successors, (1720), 16 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:38,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:38,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 298 [2022-11-25 17:52:38,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:41,091 INFO L130 PetriNetUnfolder]: 1074/1765 cut-off events. [2022-11-25 17:52:41,092 INFO L131 PetriNetUnfolder]: For 2072/2096 co-relation queries the response was YES. [2022-11-25 17:52:41,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6772 conditions, 1765 events. 1074/1765 cut-off events. For 2072/2096 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9737 event pairs, 340 based on Foata normal form. 24/1161 useless extension candidates. Maximal degree in co-relation 6751. Up to 1394 conditions per place. [2022-11-25 17:52:41,102 INFO L137 encePairwiseOnDemand]: 287/298 looper letters, 69 selfloop transitions, 40 changer transitions 8/119 dead transitions. [2022-11-25 17:52:41,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 119 transitions, 931 flow [2022-11-25 17:52:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:52:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:52:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1796 transitions. [2022-11-25 17:52:41,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3766778523489933 [2022-11-25 17:52:41,110 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1796 transitions. [2022-11-25 17:52:41,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1796 transitions. [2022-11-25 17:52:41,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:41,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1796 transitions. [2022-11-25 17:52:41,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 112.25) internal successors, (1796), 16 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:41,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 298.0) internal successors, (5066), 17 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:41,127 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 298.0) internal successors, (5066), 17 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:41,127 INFO L175 Difference]: Start difference. First operand has 49 places, 30 transitions, 185 flow. Second operand 16 states and 1796 transitions. [2022-11-25 17:52:41,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 119 transitions, 931 flow [2022-11-25 17:52:41,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 119 transitions, 916 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:41,134 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 598 flow [2022-11-25 17:52:41,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=598, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2022-11-25 17:52:41,135 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2022-11-25 17:52:41,135 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 598 flow [2022-11-25 17:52:41,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.5) internal successors, (1720), 16 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:41,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:41,136 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:41,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:41,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:52:41,347 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash 865502565, now seen corresponding path program 1 times [2022-11-25 17:52:41,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:41,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461633178] [2022-11-25 17:52:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:41,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461633178] [2022-11-25 17:52:42,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461633178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260797285] [2022-11-25 17:52:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:42,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:42,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:42,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:52:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:42,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:52:42,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:42,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:52:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:42,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:52:42,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:42,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:52:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:42,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:42,519 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_320 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_320) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2022-11-25 17:52:44,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:44,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-25 17:52:44,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:44,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 89 [2022-11-25 17:52:44,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-11-25 17:52:44,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-11-25 17:52:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:44,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260797285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:44,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:44,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-25 17:52:44,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535549826] [2022-11-25 17:52:44,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:44,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:52:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:52:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=196, Unknown=1, NotChecked=28, Total=272 [2022-11-25 17:52:46,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:47,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:52:47,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 598 flow. Second operand has 17 states, 17 states have (on average 90.41176470588235) internal successors, (1537), 17 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:47,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:47,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:52:47,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:49,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:50,899 INFO L130 PetriNetUnfolder]: 1162/1912 cut-off events. [2022-11-25 17:52:50,900 INFO L131 PetriNetUnfolder]: For 6795/6821 co-relation queries the response was YES. [2022-11-25 17:52:50,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10100 conditions, 1912 events. 1162/1912 cut-off events. For 6795/6821 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 10914 event pairs, 542 based on Foata normal form. 22/1472 useless extension candidates. Maximal degree in co-relation 10071. Up to 1689 conditions per place. [2022-11-25 17:52:50,918 INFO L137 encePairwiseOnDemand]: 285/298 looper letters, 77 selfloop transitions, 45 changer transitions 1/125 dead transitions. [2022-11-25 17:52:50,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 125 transitions, 1281 flow [2022-11-25 17:52:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:52:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:52:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1245 transitions. [2022-11-25 17:52:50,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32137325761486835 [2022-11-25 17:52:50,924 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1245 transitions. [2022-11-25 17:52:50,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1245 transitions. [2022-11-25 17:52:50,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:50,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1245 transitions. [2022-11-25 17:52:50,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.76923076923077) internal successors, (1245), 13 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:50,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 298.0) internal successors, (4172), 14 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:50,938 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 298.0) internal successors, (4172), 14 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:50,938 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 598 flow. Second operand 13 states and 1245 transitions. [2022-11-25 17:52:50,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 125 transitions, 1281 flow [2022-11-25 17:52:50,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 125 transitions, 1168 flow, removed 50 selfloop flow, removed 5 redundant places. [2022-11-25 17:52:50,963 INFO L231 Difference]: Finished difference. Result has 80 places, 91 transitions, 894 flow [2022-11-25 17:52:50,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=894, PETRI_PLACES=80, PETRI_TRANSITIONS=91} [2022-11-25 17:52:50,964 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2022-11-25 17:52:50,964 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 91 transitions, 894 flow [2022-11-25 17:52:50,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.41176470588235) internal successors, (1537), 17 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:50,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:50,966 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:50,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:51,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:52:51,172 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1185453036, now seen corresponding path program 1 times [2022-11-25 17:52:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:51,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865136758] [2022-11-25 17:52:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:52,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865136758] [2022-11-25 17:52:52,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865136758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743586182] [2022-11-25 17:52:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:52,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:52,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:52,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:52:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:52:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:52,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:52,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:52:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:52,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:52,446 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_355 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_355) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2022-11-25 17:52:52,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:52,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2022-11-25 17:52:52,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-25 17:52:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:52:52,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743586182] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:52,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:52,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 15 [2022-11-25 17:52:52,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148539181] [2022-11-25 17:52:52,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:52,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:52:52,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:52:52,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2022-11-25 17:52:52,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 298 [2022-11-25 17:52:52,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 91 transitions, 894 flow. Second operand has 6 states, 6 states have (on average 105.33333333333333) internal successors, (632), 6 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:52,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:52,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 298 [2022-11-25 17:52:52,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:52,661 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_355 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_355) c_~q~0.base) .cse0)))) (< 0 (+ c_~s~0 2147483649 (select (select |c_#memory_int| c_~q~0.base) .cse0))))) is different from false [2022-11-25 17:52:53,131 INFO L130 PetriNetUnfolder]: 1241/2060 cut-off events. [2022-11-25 17:52:53,132 INFO L131 PetriNetUnfolder]: For 12077/12100 co-relation queries the response was YES. [2022-11-25 17:52:53,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12063 conditions, 2060 events. 1241/2060 cut-off events. For 12077/12100 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 11720 event pairs, 106 based on Foata normal form. 43/1664 useless extension candidates. Maximal degree in co-relation 12029. Up to 1777 conditions per place. [2022-11-25 17:52:53,153 INFO L137 encePairwiseOnDemand]: 287/298 looper letters, 84 selfloop transitions, 34 changer transitions 3/123 dead transitions. [2022-11-25 17:52:53,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 123 transitions, 1447 flow [2022-11-25 17:52:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:52:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:52:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 559 transitions. [2022-11-25 17:52:53,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37516778523489935 [2022-11-25 17:52:53,157 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 559 transitions. [2022-11-25 17:52:53,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 559 transitions. [2022-11-25 17:52:53,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:53,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 559 transitions. [2022-11-25 17:52:53,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.8) internal successors, (559), 5 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:53,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:53,163 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:53,163 INFO L175 Difference]: Start difference. First operand has 80 places, 91 transitions, 894 flow. Second operand 5 states and 559 transitions. [2022-11-25 17:52:53,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 123 transitions, 1447 flow [2022-11-25 17:52:53,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 123 transitions, 1400 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-11-25 17:52:53,188 INFO L231 Difference]: Finished difference. Result has 82 places, 108 transitions, 1129 flow [2022-11-25 17:52:53,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1129, PETRI_PLACES=82, PETRI_TRANSITIONS=108} [2022-11-25 17:52:53,189 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2022-11-25 17:52:53,189 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 108 transitions, 1129 flow [2022-11-25 17:52:53,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.33333333333333) internal successors, (632), 6 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:53,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:53,190 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:53,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:53,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:52:53,396 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 854420359, now seen corresponding path program 2 times [2022-11-25 17:52:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645791201] [2022-11-25 17:52:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:54,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:54,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645791201] [2022-11-25 17:52:54,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645791201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:54,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971474084] [2022-11-25 17:52:54,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:54,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:54,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:54,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:54,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:52:54,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:52:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:54,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:52:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:54,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:52:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:54,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:54,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971474084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:54,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:54,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2022-11-25 17:52:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675629351] [2022-11-25 17:52:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:52:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:52:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:52:54,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 298 [2022-11-25 17:52:54,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 108 transitions, 1129 flow. Second operand has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:54,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:54,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 298 [2022-11-25 17:52:54,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:55,229 INFO L130 PetriNetUnfolder]: 1193/1969 cut-off events. [2022-11-25 17:52:55,229 INFO L131 PetriNetUnfolder]: For 13008/13031 co-relation queries the response was YES. [2022-11-25 17:52:55,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13264 conditions, 1969 events. 1193/1969 cut-off events. For 13008/13031 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 10897 event pairs, 326 based on Foata normal form. 60/1749 useless extension candidates. Maximal degree in co-relation 13227. Up to 1856 conditions per place. [2022-11-25 17:52:55,251 INFO L137 encePairwiseOnDemand]: 291/298 looper letters, 91 selfloop transitions, 11 changer transitions 5/109 dead transitions. [2022-11-25 17:52:55,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 109 transitions, 1322 flow [2022-11-25 17:52:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:52:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:52:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2022-11-25 17:52:55,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41442953020134227 [2022-11-25 17:52:55,254 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2022-11-25 17:52:55,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2022-11-25 17:52:55,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:55,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2022-11-25 17:52:55,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:55,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:55,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:55,260 INFO L175 Difference]: Start difference. First operand has 82 places, 108 transitions, 1129 flow. Second operand 4 states and 494 transitions. [2022-11-25 17:52:55,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 109 transitions, 1322 flow [2022-11-25 17:52:55,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 1303 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:55,299 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 1039 flow [2022-11-25 17:52:55,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1039, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2022-11-25 17:52:55,300 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 54 predicate places. [2022-11-25 17:52:55,300 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 1039 flow [2022-11-25 17:52:55,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:55,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:55,301 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:55,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:55,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:52:55,506 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 892756609, now seen corresponding path program 1 times [2022-11-25 17:52:55,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:55,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116597672] [2022-11-25 17:52:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:55,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:55,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116597672] [2022-11-25 17:52:55,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116597672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:55,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:55,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:52:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770120880] [2022-11-25 17:52:55,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:55,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:52:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:52:55,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:52:55,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 298 [2022-11-25 17:52:55,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 1039 flow. Second operand has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:55,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:55,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 298 [2022-11-25 17:52:55,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:56,371 INFO L130 PetriNetUnfolder]: 1596/2902 cut-off events. [2022-11-25 17:52:56,371 INFO L131 PetriNetUnfolder]: For 21060/21081 co-relation queries the response was YES. [2022-11-25 17:52:56,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19916 conditions, 2902 events. 1596/2902 cut-off events. For 21060/21081 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 18653 event pairs, 274 based on Foata normal form. 257/2818 useless extension candidates. Maximal degree in co-relation 19877. Up to 1822 conditions per place. [2022-11-25 17:52:56,403 INFO L137 encePairwiseOnDemand]: 290/298 looper letters, 79 selfloop transitions, 40 changer transitions 6/127 dead transitions. [2022-11-25 17:52:56,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1641 flow [2022-11-25 17:52:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:52:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:52:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 548 transitions. [2022-11-25 17:52:56,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4597315436241611 [2022-11-25 17:52:56,406 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 548 transitions. [2022-11-25 17:52:56,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 548 transitions. [2022-11-25 17:52:56,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:56,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 548 transitions. [2022-11-25 17:52:56,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:56,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:56,411 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:56,411 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 1039 flow. Second operand 4 states and 548 transitions. [2022-11-25 17:52:56,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1641 flow [2022-11-25 17:52:56,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 1592 flow, removed 15 selfloop flow, removed 4 redundant places. [2022-11-25 17:52:56,481 INFO L231 Difference]: Finished difference. Result has 84 places, 111 transitions, 1428 flow [2022-11-25 17:52:56,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1428, PETRI_PLACES=84, PETRI_TRANSITIONS=111} [2022-11-25 17:52:56,482 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2022-11-25 17:52:56,482 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 111 transitions, 1428 flow [2022-11-25 17:52:56,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:56,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:56,483 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:56,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:52:56,483 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:52:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1426352141, now seen corresponding path program 1 times [2022-11-25 17:52:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:56,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548995612] [2022-11-25 17:52:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:58,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:58,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548995612] [2022-11-25 17:52:58,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548995612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:58,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024225247] [2022-11-25 17:52:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:58,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:58,183 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:58,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:52:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:58,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:52:58,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:58,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:58,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:52:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:58,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:58,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:58,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2022-11-25 17:52:58,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-25 17:52:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:52:58,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024225247] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:58,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:58,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 19 [2022-11-25 17:52:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897086444] [2022-11-25 17:52:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:58,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=350, Unknown=4, NotChecked=0, Total=420 [2022-11-25 17:53:01,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:01,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 298 [2022-11-25 17:53:01,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 111 transitions, 1428 flow. Second operand has 7 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:01,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:01,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 298 [2022-11-25 17:53:01,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:06,520 INFO L130 PetriNetUnfolder]: 1759/3166 cut-off events. [2022-11-25 17:53:06,520 INFO L131 PetriNetUnfolder]: For 32743/32743 co-relation queries the response was YES. [2022-11-25 17:53:06,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24363 conditions, 3166 events. 1759/3166 cut-off events. For 32743/32743 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20042 event pairs, 128 based on Foata normal form. 182/2894 useless extension candidates. Maximal degree in co-relation 24330. Up to 2005 conditions per place. [2022-11-25 17:53:06,549 INFO L137 encePairwiseOnDemand]: 287/298 looper letters, 95 selfloop transitions, 82 changer transitions 14/192 dead transitions. [2022-11-25 17:53:06,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 192 transitions, 2945 flow [2022-11-25 17:53:06,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:53:06,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:53:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 928 transitions. [2022-11-25 17:53:06,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3460104399701715 [2022-11-25 17:53:06,557 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 928 transitions. [2022-11-25 17:53:06,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 928 transitions. [2022-11-25 17:53:06,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:06,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 928 transitions. [2022-11-25 17:53:06,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.11111111111111) internal successors, (928), 9 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:06,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 298.0) internal successors, (2980), 10 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:06,568 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 298.0) internal successors, (2980), 10 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:06,568 INFO L175 Difference]: Start difference. First operand has 84 places, 111 transitions, 1428 flow. Second operand 9 states and 928 transitions. [2022-11-25 17:53:06,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 192 transitions, 2945 flow [2022-11-25 17:53:06,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 192 transitions, 2707 flow, removed 119 selfloop flow, removed 3 redundant places. [2022-11-25 17:53:06,654 INFO L231 Difference]: Finished difference. Result has 86 places, 140 transitions, 2022 flow [2022-11-25 17:53:06,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2022, PETRI_PLACES=86, PETRI_TRANSITIONS=140} [2022-11-25 17:53:06,655 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2022-11-25 17:53:06,655 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 140 transitions, 2022 flow [2022-11-25 17:53:06,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:06,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:06,656 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:06,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 17:53:06,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:53:06,862 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:53:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1556371324, now seen corresponding path program 1 times [2022-11-25 17:53:06,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:06,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397897339] [2022-11-25 17:53:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:06,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:06,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:06,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397897339] [2022-11-25 17:53:06,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397897339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:06,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582013616] [2022-11-25 17:53:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:06,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:06,983 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:07,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:53:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:53:07,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:53:07,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:53:07,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582013616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:07,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:07,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-25 17:53:07,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107691280] [2022-11-25 17:53:07,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:53:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:53:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:53:07,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 298 [2022-11-25 17:53:07,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 140 transitions, 2022 flow. Second operand has 18 states, 18 states have (on average 120.66666666666667) internal successors, (2172), 18 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:07,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:07,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 298 [2022-11-25 17:53:07,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:08,816 INFO L130 PetriNetUnfolder]: 1332/2532 cut-off events. [2022-11-25 17:53:08,816 INFO L131 PetriNetUnfolder]: For 28258/28258 co-relation queries the response was YES. [2022-11-25 17:53:08,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19232 conditions, 2532 events. 1332/2532 cut-off events. For 28258/28258 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15957 event pairs, 221 based on Foata normal form. 130/2506 useless extension candidates. Maximal degree in co-relation 19197. Up to 1126 conditions per place. [2022-11-25 17:53:08,836 INFO L137 encePairwiseOnDemand]: 291/298 looper letters, 249 selfloop transitions, 33 changer transitions 16/299 dead transitions. [2022-11-25 17:53:08,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 299 transitions, 4919 flow [2022-11-25 17:53:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:53:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:53:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2019 transitions. [2022-11-25 17:53:08,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4234479865771812 [2022-11-25 17:53:08,842 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2019 transitions. [2022-11-25 17:53:08,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2019 transitions. [2022-11-25 17:53:08,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:08,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2019 transitions. [2022-11-25 17:53:08,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 126.1875) internal successors, (2019), 16 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:08,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 298.0) internal successors, (5066), 17 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:08,858 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 298.0) internal successors, (5066), 17 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:08,858 INFO L175 Difference]: Start difference. First operand has 86 places, 140 transitions, 2022 flow. Second operand 16 states and 2019 transitions. [2022-11-25 17:53:08,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 299 transitions, 4919 flow [2022-11-25 17:53:08,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 299 transitions, 4412 flow, removed 249 selfloop flow, removed 2 redundant places. [2022-11-25 17:53:08,948 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 1646 flow [2022-11-25 17:53:08,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1646, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2022-11-25 17:53:08,949 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2022-11-25 17:53:08,949 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 1646 flow [2022-11-25 17:53:08,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 120.66666666666667) internal successors, (2172), 18 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:08,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:08,950 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:08,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:09,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:53:09,156 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:53:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1054058075, now seen corresponding path program 1 times [2022-11-25 17:53:09,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:09,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472832019] [2022-11-25 17:53:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:09,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:10,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:10,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472832019] [2022-11-25 17:53:10,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472832019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:10,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744891183] [2022-11-25 17:53:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:10,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:10,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:10,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:10,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:53:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:10,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:53:10,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:10,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:10,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:53:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:53:10,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:10,778 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_509 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_509) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2022-11-25 17:53:10,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:10,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2022-11-25 17:53:10,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-25 17:53:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:10,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744891183] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:10,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:53:10,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 15 [2022-11-25 17:53:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750743949] [2022-11-25 17:53:10,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:10,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:53:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:53:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2022-11-25 17:53:10,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 298 [2022-11-25 17:53:10,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 1646 flow. Second operand has 6 states, 6 states have (on average 105.66666666666667) internal successors, (634), 6 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:10,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:10,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 298 [2022-11-25 17:53:10,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:11,621 INFO L130 PetriNetUnfolder]: 1312/2538 cut-off events. [2022-11-25 17:53:11,621 INFO L131 PetriNetUnfolder]: For 23562/23586 co-relation queries the response was YES. [2022-11-25 17:53:11,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18372 conditions, 2538 events. 1312/2538 cut-off events. For 23562/23586 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16152 event pairs, 187 based on Foata normal form. 67/2459 useless extension candidates. Maximal degree in co-relation 18334. Up to 2150 conditions per place. [2022-11-25 17:53:11,641 INFO L137 encePairwiseOnDemand]: 288/298 looper letters, 93 selfloop transitions, 28 changer transitions 9/133 dead transitions. [2022-11-25 17:53:11,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 2030 flow [2022-11-25 17:53:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:53:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:53:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2022-11-25 17:53:11,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3724832214765101 [2022-11-25 17:53:11,644 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2022-11-25 17:53:11,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2022-11-25 17:53:11,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:11,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2022-11-25 17:53:11,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:11,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:11,650 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:11,650 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 1646 flow. Second operand 5 states and 555 transitions. [2022-11-25 17:53:11,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 2030 flow [2022-11-25 17:53:11,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 133 transitions, 1953 flow, removed 12 selfloop flow, removed 9 redundant places. [2022-11-25 17:53:11,730 INFO L231 Difference]: Finished difference. Result has 98 places, 108 transitions, 1486 flow [2022-11-25 17:53:11,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1486, PETRI_PLACES=98, PETRI_TRANSITIONS=108} [2022-11-25 17:53:11,731 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2022-11-25 17:53:11,731 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 108 transitions, 1486 flow [2022-11-25 17:53:11,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.66666666666667) internal successors, (634), 6 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:11,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:11,732 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:11,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:11,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:11,938 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:53:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1267119269, now seen corresponding path program 1 times [2022-11-25 17:53:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826882727] [2022-11-25 17:53:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:11,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:13,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:13,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826882727] [2022-11-25 17:53:13,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826882727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:13,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369986619] [2022-11-25 17:53:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:13,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:13,695 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:13,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:53:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:53:13,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:14,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:14,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:53:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:53:14,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:14,269 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_548 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_548) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2022-11-25 17:53:14,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:14,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2022-11-25 17:53:14,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-25 17:53:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:14,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369986619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:14,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:14,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 20 [2022-11-25 17:53:14,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806813192] [2022-11-25 17:53:14,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:14,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:53:14,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:53:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=364, Unknown=1, NotChecked=38, Total=462 [2022-11-25 17:53:14,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 298 [2022-11-25 17:53:14,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 108 transitions, 1486 flow. Second operand has 22 states, 22 states have (on average 82.54545454545455) internal successors, (1816), 22 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:14,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:14,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 298 [2022-11-25 17:53:14,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:18,266 INFO L130 PetriNetUnfolder]: 1115/2261 cut-off events. [2022-11-25 17:53:18,266 INFO L131 PetriNetUnfolder]: For 23717/23717 co-relation queries the response was YES. [2022-11-25 17:53:18,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16481 conditions, 2261 events. 1115/2261 cut-off events. For 23717/23717 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14463 event pairs, 208 based on Foata normal form. 104/2299 useless extension candidates. Maximal degree in co-relation 16443. Up to 1087 conditions per place. [2022-11-25 17:53:18,286 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 92 selfloop transitions, 70 changer transitions 3/166 dead transitions. [2022-11-25 17:53:18,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 166 transitions, 2416 flow [2022-11-25 17:53:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:53:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 17:53:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1541 transitions. [2022-11-25 17:53:18,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2872856077554064 [2022-11-25 17:53:18,290 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1541 transitions. [2022-11-25 17:53:18,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1541 transitions. [2022-11-25 17:53:18,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:18,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1541 transitions. [2022-11-25 17:53:18,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.61111111111111) internal successors, (1541), 18 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:18,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 298.0) internal successors, (5662), 19 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:18,301 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 298.0) internal successors, (5662), 19 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:18,301 INFO L175 Difference]: Start difference. First operand has 98 places, 108 transitions, 1486 flow. Second operand 18 states and 1541 transitions. [2022-11-25 17:53:18,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 166 transitions, 2416 flow [2022-11-25 17:53:18,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 166 transitions, 2278 flow, removed 45 selfloop flow, removed 4 redundant places. [2022-11-25 17:53:18,387 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 1634 flow [2022-11-25 17:53:18,387 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1634, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2022-11-25 17:53:18,388 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2022-11-25 17:53:18,388 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 1634 flow [2022-11-25 17:53:18,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 82.54545454545455) internal successors, (1816), 22 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:18,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:18,389 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-25 17:53:18,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:18,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:18,595 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:53:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1261502503, now seen corresponding path program 2 times [2022-11-25 17:53:18,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:18,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654986741] [2022-11-25 17:53:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:18,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:18,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654986741] [2022-11-25 17:53:18,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654986741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706683385] [2022-11-25 17:53:18,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:18,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:18,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:18,727 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:18,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:53:18,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:53:18,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:53:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 17:53:18,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:53:18,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706683385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:18,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:53:18,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7] total 8 [2022-11-25 17:53:18,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478361344] [2022-11-25 17:53:18,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:18,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:53:18,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:18,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:53:18,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:53:18,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 298 [2022-11-25 17:53:18,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 1634 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:18,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:18,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 298 [2022-11-25 17:53:18,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:19,455 INFO L130 PetriNetUnfolder]: 1026/2095 cut-off events. [2022-11-25 17:53:19,456 INFO L131 PetriNetUnfolder]: For 18338/18352 co-relation queries the response was YES. [2022-11-25 17:53:19,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14749 conditions, 2095 events. 1026/2095 cut-off events. For 18338/18352 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13238 event pairs, 517 based on Foata normal form. 76/2108 useless extension candidates. Maximal degree in co-relation 14712. Up to 2067 conditions per place. [2022-11-25 17:53:19,477 INFO L137 encePairwiseOnDemand]: 296/298 looper letters, 106 selfloop transitions, 1 changer transitions 2/113 dead transitions. [2022-11-25 17:53:19,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 113 transitions, 1797 flow [2022-11-25 17:53:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:53:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:53:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2022-11-25 17:53:19,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4507829977628635 [2022-11-25 17:53:19,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2022-11-25 17:53:19,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2022-11-25 17:53:19,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:19,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2022-11-25 17:53:19,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:19,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:19,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:19,484 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 1634 flow. Second operand 3 states and 403 transitions. [2022-11-25 17:53:19,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 113 transitions, 1797 flow [2022-11-25 17:53:19,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 1685 flow, removed 12 selfloop flow, removed 16 redundant places. [2022-11-25 17:53:19,550 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1433 flow [2022-11-25 17:53:19,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1433, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2022-11-25 17:53:19,551 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 61 predicate places. [2022-11-25 17:53:19,551 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1433 flow [2022-11-25 17:53:19,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:19,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:19,552 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:19,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:19,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:19,758 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:53:19,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1598742700, now seen corresponding path program 2 times [2022-11-25 17:53:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:19,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336352495] [2022-11-25 17:53:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:20,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:20,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336352495] [2022-11-25 17:53:20,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336352495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:20,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152961498] [2022-11-25 17:53:20,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:20,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:20,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:20,507 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:20,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:53:20,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:20,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 17:53:20,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:20,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:53:20,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:53:20,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:53:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:21,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:21,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:21,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 85 [2022-11-25 17:53:21,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:21,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 276 [2022-11-25 17:53:21,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:21,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 224 [2022-11-25 17:53:21,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:21,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 171 [2022-11-25 17:53:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:24,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152961498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:24,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:24,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-25 17:53:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582660479] [2022-11-25 17:53:24,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:24,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:53:24,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:53:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=505, Unknown=2, NotChecked=0, Total=650 [2022-11-25 17:53:26,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:53:26,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1433 flow. Second operand has 26 states, 26 states have (on average 90.26923076923077) internal successors, (2347), 26 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:26,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:26,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:53:26,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:29,263 INFO L130 PetriNetUnfolder]: 1126/2211 cut-off events. [2022-11-25 17:53:29,263 INFO L131 PetriNetUnfolder]: For 20745/20760 co-relation queries the response was YES. [2022-11-25 17:53:29,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15263 conditions, 2211 events. 1126/2211 cut-off events. For 20745/20760 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13808 event pairs, 151 based on Foata normal form. 69/2280 useless extension candidates. Maximal degree in co-relation 15234. Up to 1636 conditions per place. [2022-11-25 17:53:29,276 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 130 selfloop transitions, 84 changer transitions 1/219 dead transitions. [2022-11-25 17:53:29,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 219 transitions, 3040 flow [2022-11-25 17:53:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:53:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:53:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2252 transitions. [2022-11-25 17:53:29,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31487695749440714 [2022-11-25 17:53:29,282 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2252 transitions. [2022-11-25 17:53:29,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2252 transitions. [2022-11-25 17:53:29,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:29,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2252 transitions. [2022-11-25 17:53:29,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 93.83333333333333) internal successors, (2252), 24 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:29,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 298.0) internal successors, (7450), 25 states have internal predecessors, (7450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:29,297 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 298.0) internal successors, (7450), 25 states have internal predecessors, (7450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:29,297 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1433 flow. Second operand 24 states and 2252 transitions. [2022-11-25 17:53:29,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 219 transitions, 3040 flow [2022-11-25 17:53:29,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 219 transitions, 3039 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:53:29,356 INFO L231 Difference]: Finished difference. Result has 120 places, 159 transitions, 2429 flow [2022-11-25 17:53:29,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2429, PETRI_PLACES=120, PETRI_TRANSITIONS=159} [2022-11-25 17:53:29,357 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2022-11-25 17:53:29,357 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 159 transitions, 2429 flow [2022-11-25 17:53:29,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 90.26923076923077) internal successors, (2347), 26 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:29,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:29,358 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:29,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:29,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:29,564 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:53:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:29,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1352099968, now seen corresponding path program 1 times [2022-11-25 17:53:29,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:29,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966025710] [2022-11-25 17:53:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:29,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:30,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:30,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966025710] [2022-11-25 17:53:30,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966025710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:30,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663465625] [2022-11-25 17:53:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:30,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:30,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:30,335 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:30,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:53:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:30,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:53:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:30,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:30,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:53:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:53:30,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:30,816 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_655 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_655) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1))) is different from false [2022-11-25 17:53:30,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:30,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-25 17:53:30,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-11-25 17:53:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:30,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663465625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:30,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:30,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2022-11-25 17:53:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594270990] [2022-11-25 17:53:30,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:30,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:53:30,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:53:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=407, Unknown=1, NotChecked=40, Total=506 [2022-11-25 17:53:31,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:53:31,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 159 transitions, 2429 flow. Second operand has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:31,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:31,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:53:31,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:32,580 INFO L130 PetriNetUnfolder]: 1495/2908 cut-off events. [2022-11-25 17:53:32,581 INFO L131 PetriNetUnfolder]: For 48490/48516 co-relation queries the response was YES. [2022-11-25 17:53:32,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22879 conditions, 2908 events. 1495/2908 cut-off events. For 48490/48516 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19504 event pairs, 42 based on Foata normal form. 216/3124 useless extension candidates. Maximal degree in co-relation 22843. Up to 1198 conditions per place. [2022-11-25 17:53:32,600 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 105 selfloop transitions, 125 changer transitions 7/241 dead transitions. [2022-11-25 17:53:32,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 241 transitions, 3822 flow [2022-11-25 17:53:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:53:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 17:53:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2022-11-25 17:53:32,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31711409395973156 [2022-11-25 17:53:32,605 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2022-11-25 17:53:32,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2022-11-25 17:53:32,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:32,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2022-11-25 17:53:32,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:32,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 298.0) internal successors, (5662), 19 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:32,617 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 298.0) internal successors, (5662), 19 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:32,617 INFO L175 Difference]: Start difference. First operand has 120 places, 159 transitions, 2429 flow. Second operand 18 states and 1701 transitions. [2022-11-25 17:53:32,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 241 transitions, 3822 flow [2022-11-25 17:53:32,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 241 transitions, 3622 flow, removed 95 selfloop flow, removed 4 redundant places. [2022-11-25 17:53:32,819 INFO L231 Difference]: Finished difference. Result has 136 places, 179 transitions, 2958 flow [2022-11-25 17:53:32,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2958, PETRI_PLACES=136, PETRI_TRANSITIONS=179} [2022-11-25 17:53:32,820 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2022-11-25 17:53:32,820 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 179 transitions, 2958 flow [2022-11-25 17:53:32,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:32,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:32,821 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:32,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:33,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:33,022 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:53:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1180757652, now seen corresponding path program 1 times [2022-11-25 17:53:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:33,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428668447] [2022-11-25 17:53:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:33,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:33,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428668447] [2022-11-25 17:53:33,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428668447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765809679] [2022-11-25 17:53:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:33,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:33,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:33,559 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:33,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:53:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:33,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:53:33,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:33,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:53:33,886 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 17:53:33,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-25 17:53:34,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:34,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 17:53:34,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:34,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 17:53:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:34,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:35,429 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-25 17:53:35,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 87 [2022-11-25 17:53:35,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:35,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 234 [2022-11-25 17:53:35,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:35,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 145 [2022-11-25 17:53:35,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:35,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 99 [2022-11-25 17:53:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:40,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765809679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:40,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:40,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2022-11-25 17:53:40,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311402192] [2022-11-25 17:53:40,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:40,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:53:40,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:40,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:53:40,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=504, Unknown=3, NotChecked=0, Total=600 [2022-11-25 17:53:40,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:53:40,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 179 transitions, 2958 flow. Second operand has 25 states, 25 states have (on average 90.32) internal successors, (2258), 25 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:40,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:40,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:53:40,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:42,883 INFO L130 PetriNetUnfolder]: 1475/2865 cut-off events. [2022-11-25 17:53:42,883 INFO L131 PetriNetUnfolder]: For 53868/53882 co-relation queries the response was YES. [2022-11-25 17:53:42,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24045 conditions, 2865 events. 1475/2865 cut-off events. For 53868/53882 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19028 event pairs, 587 based on Foata normal form. 16/2881 useless extension candidates. Maximal degree in co-relation 24005. Up to 2629 conditions per place. [2022-11-25 17:53:42,904 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 154 selfloop transitions, 49 changer transitions 1/208 dead transitions. [2022-11-25 17:53:42,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 208 transitions, 3663 flow [2022-11-25 17:53:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:53:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:53:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1304 transitions. [2022-11-25 17:53:42,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31255992329817833 [2022-11-25 17:53:42,908 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1304 transitions. [2022-11-25 17:53:42,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1304 transitions. [2022-11-25 17:53:42,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:42,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1304 transitions. [2022-11-25 17:53:42,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.14285714285714) internal successors, (1304), 14 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:42,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 298.0) internal successors, (4470), 15 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:42,916 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 298.0) internal successors, (4470), 15 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:42,916 INFO L175 Difference]: Start difference. First operand has 136 places, 179 transitions, 2958 flow. Second operand 14 states and 1304 transitions. [2022-11-25 17:53:42,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 208 transitions, 3663 flow [2022-11-25 17:53:43,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 208 transitions, 3125 flow, removed 200 selfloop flow, removed 10 redundant places. [2022-11-25 17:53:43,238 INFO L231 Difference]: Finished difference. Result has 141 places, 184 transitions, 2667 flow [2022-11-25 17:53:43,239 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2667, PETRI_PLACES=141, PETRI_TRANSITIONS=184} [2022-11-25 17:53:43,239 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 110 predicate places. [2022-11-25 17:53:43,239 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 184 transitions, 2667 flow [2022-11-25 17:53:43,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.32) internal successors, (2258), 25 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:43,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:43,240 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:43,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:43,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:43,440 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:53:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1180757698, now seen corresponding path program 2 times [2022-11-25 17:53:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:43,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867217017] [2022-11-25 17:53:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:43,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:44,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:44,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867217017] [2022-11-25 17:53:44,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867217017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:44,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477728474] [2022-11-25 17:53:44,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:44,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:44,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:44,341 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:44,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:53:44,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:44,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:44,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 17:53:44,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:44,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:53:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:44,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:53:45,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:45,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-25 17:53:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:45,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:47,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:47,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2022-11-25 17:53:47,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:47,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 190 [2022-11-25 17:53:47,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 71 [2022-11-25 17:53:47,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:47,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 73 [2022-11-25 17:53:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:49,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477728474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:49,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:49,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-25 17:53:49,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327879395] [2022-11-25 17:53:49,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:49,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:53:49,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:53:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=546, Unknown=4, NotChecked=0, Total=650 [2022-11-25 17:53:51,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:54,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:57,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:58,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:53:58,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 184 transitions, 2667 flow. Second operand has 26 states, 26 states have (on average 90.26923076923077) internal successors, (2347), 26 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:58,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:58,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:53:58,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:01,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:03,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:05,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:13,497 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:54:20,146 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:54:23,070 INFO L130 PetriNetUnfolder]: 1785/3367 cut-off events. [2022-11-25 17:54:23,070 INFO L131 PetriNetUnfolder]: For 35374/35381 co-relation queries the response was YES. [2022-11-25 17:54:23,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24313 conditions, 3367 events. 1785/3367 cut-off events. For 35374/35381 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22544 event pairs, 562 based on Foata normal form. 62/3429 useless extension candidates. Maximal degree in co-relation 24271. Up to 2617 conditions per place. [2022-11-25 17:54:23,095 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 201 selfloop transitions, 90 changer transitions 5/300 dead transitions. [2022-11-25 17:54:23,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 300 transitions, 4587 flow [2022-11-25 17:54:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:54:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 17:54:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2153 transitions. [2022-11-25 17:54:23,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3141231397723957 [2022-11-25 17:54:23,100 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2153 transitions. [2022-11-25 17:54:23,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2153 transitions. [2022-11-25 17:54:23,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:23,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2153 transitions. [2022-11-25 17:54:23,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.6086956521739) internal successors, (2153), 23 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:23,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 298.0) internal successors, (7152), 24 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:23,113 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 298.0) internal successors, (7152), 24 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:23,114 INFO L175 Difference]: Start difference. First operand has 141 places, 184 transitions, 2667 flow. Second operand 23 states and 2153 transitions. [2022-11-25 17:54:23,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 300 transitions, 4587 flow [2022-11-25 17:54:23,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 300 transitions, 4514 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-11-25 17:54:23,273 INFO L231 Difference]: Finished difference. Result has 162 places, 228 transitions, 3612 flow [2022-11-25 17:54:23,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=2522, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3612, PETRI_PLACES=162, PETRI_TRANSITIONS=228} [2022-11-25 17:54:23,274 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2022-11-25 17:54:23,275 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 228 transitions, 3612 flow [2022-11-25 17:54:23,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 90.26923076923077) internal successors, (2347), 26 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:23,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:23,276 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:23,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:23,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:23,486 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:54:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1180757280, now seen corresponding path program 3 times [2022-11-25 17:54:23,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:23,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294667455] [2022-11-25 17:54:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:23,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:24,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:24,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294667455] [2022-11-25 17:54:24,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294667455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:24,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544549345] [2022-11-25 17:54:24,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:54:24,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:24,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:24,375 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:24,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:54:24,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:54:24,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:24,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:54:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:24,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:54:24,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:54:24,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:54:24,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:54:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:25,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:26,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:26,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2022-11-25 17:54:26,149 INFO L321 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-11-25 17:54:26,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 408 treesize of output 388 [2022-11-25 17:54:26,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:54:26,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:54:26,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:26,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 268 [2022-11-25 17:54:26,259 INFO L321 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-11-25 17:54:26,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 274 [2022-11-25 17:54:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:27,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544549345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:27,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:27,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-25 17:54:27,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637012583] [2022-11-25 17:54:27,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:27,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:54:27,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:27,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:54:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=523, Unknown=1, NotChecked=0, Total=650 [2022-11-25 17:54:30,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:54:30,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 228 transitions, 3612 flow. Second operand has 26 states, 26 states have (on average 90.26923076923077) internal successors, (2347), 26 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:30,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:30,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:54:30,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:32,901 INFO L130 PetriNetUnfolder]: 1776/3345 cut-off events. [2022-11-25 17:54:32,901 INFO L131 PetriNetUnfolder]: For 44804/44808 co-relation queries the response was YES. [2022-11-25 17:54:32,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26978 conditions, 3345 events. 1776/3345 cut-off events. For 44804/44808 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22163 event pairs, 394 based on Foata normal form. 12/3357 useless extension candidates. Maximal degree in co-relation 26928. Up to 3100 conditions per place. [2022-11-25 17:54:32,938 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 191 selfloop transitions, 56 changer transitions 7/258 dead transitions. [2022-11-25 17:54:32,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 258 transitions, 4422 flow [2022-11-25 17:54:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:54:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:54:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1756 transitions. [2022-11-25 17:54:33,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31013776050865416 [2022-11-25 17:54:33,014 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1756 transitions. [2022-11-25 17:54:33,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1756 transitions. [2022-11-25 17:54:33,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:33,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1756 transitions. [2022-11-25 17:54:33,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 92.42105263157895) internal successors, (1756), 19 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:33,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 298.0) internal successors, (5960), 20 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:33,024 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 298.0) internal successors, (5960), 20 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:33,025 INFO L175 Difference]: Start difference. First operand has 162 places, 228 transitions, 3612 flow. Second operand 19 states and 1756 transitions. [2022-11-25 17:54:33,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 258 transitions, 4422 flow [2022-11-25 17:54:33,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 3985 flow, removed 185 selfloop flow, removed 10 redundant places. [2022-11-25 17:54:33,194 INFO L231 Difference]: Finished difference. Result has 169 places, 229 transitions, 3347 flow [2022-11-25 17:54:33,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3347, PETRI_PLACES=169, PETRI_TRANSITIONS=229} [2022-11-25 17:54:33,195 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 138 predicate places. [2022-11-25 17:54:33,196 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 229 transitions, 3347 flow [2022-11-25 17:54:33,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 90.26923076923077) internal successors, (2347), 26 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:33,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:33,196 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:33,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:33,403 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:54:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash -801160645, now seen corresponding path program 2 times [2022-11-25 17:54:33,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:33,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398300081] [2022-11-25 17:54:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:33,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:34,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:34,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398300081] [2022-11-25 17:54:34,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398300081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:34,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607410655] [2022-11-25 17:54:34,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:54:34,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:34,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:34,656 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:34,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:54:34,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:54:34,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:34,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:54:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:54:35,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:54:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:54:35,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:35,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:35,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-11-25 17:54:35,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-25 17:54:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:35,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607410655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:35,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:35,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 23 [2022-11-25 17:54:35,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587071012] [2022-11-25 17:54:35,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:54:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:54:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=524, Unknown=8, NotChecked=0, Total=600 [2022-11-25 17:54:37,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 298 [2022-11-25 17:54:37,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 229 transitions, 3347 flow. Second operand has 25 states, 25 states have (on average 93.36) internal successors, (2334), 25 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:37,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:37,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 298 [2022-11-25 17:54:37,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:39,637 INFO L130 PetriNetUnfolder]: 1722/3270 cut-off events. [2022-11-25 17:54:39,637 INFO L131 PetriNetUnfolder]: For 40436/40438 co-relation queries the response was YES. [2022-11-25 17:54:39,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25067 conditions, 3270 events. 1722/3270 cut-off events. For 40436/40438 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21886 event pairs, 248 based on Foata normal form. 52/3322 useless extension candidates. Maximal degree in co-relation 25015. Up to 2333 conditions per place. [2022-11-25 17:54:39,664 INFO L137 encePairwiseOnDemand]: 290/298 looper letters, 155 selfloop transitions, 56 changer transitions 47/262 dead transitions. [2022-11-25 17:54:39,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 4058 flow [2022-11-25 17:54:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:54:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:54:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1549 transitions. [2022-11-25 17:54:39,668 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3248741610738255 [2022-11-25 17:54:39,668 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1549 transitions. [2022-11-25 17:54:39,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1549 transitions. [2022-11-25 17:54:39,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:39,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1549 transitions. [2022-11-25 17:54:39,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 96.8125) internal successors, (1549), 16 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:39,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 298.0) internal successors, (5066), 17 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:39,677 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 298.0) internal successors, (5066), 17 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:39,677 INFO L175 Difference]: Start difference. First operand has 169 places, 229 transitions, 3347 flow. Second operand 16 states and 1549 transitions. [2022-11-25 17:54:39,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 4058 flow [2022-11-25 17:54:39,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 262 transitions, 3822 flow, removed 54 selfloop flow, removed 17 redundant places. [2022-11-25 17:54:39,802 INFO L231 Difference]: Finished difference. Result has 162 places, 195 transitions, 2707 flow [2022-11-25 17:54:39,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2707, PETRI_PLACES=162, PETRI_TRANSITIONS=195} [2022-11-25 17:54:39,803 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2022-11-25 17:54:39,803 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 195 transitions, 2707 flow [2022-11-25 17:54:39,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.36) internal successors, (2334), 25 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:39,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:39,804 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:39,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-25 17:54:40,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:54:40,011 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:54:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1200281700, now seen corresponding path program 1 times [2022-11-25 17:54:40,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:40,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562434226] [2022-11-25 17:54:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:40,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:40,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562434226] [2022-11-25 17:54:40,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562434226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:40,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842140596] [2022-11-25 17:54:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:40,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:40,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:40,282 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:40,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:54:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:40,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:54:40,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:54:40,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:54:40,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842140596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:40,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:40,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 5] total 15 [2022-11-25 17:54:40,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253611092] [2022-11-25 17:54:40,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:40,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:54:40,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:54:40,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:54:40,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 298 [2022-11-25 17:54:40,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 195 transitions, 2707 flow. Second operand has 17 states, 17 states have (on average 122.0) internal successors, (2074), 17 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:40,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:40,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 298 [2022-11-25 17:54:40,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:42,241 INFO L130 PetriNetUnfolder]: 2112/3965 cut-off events. [2022-11-25 17:54:42,241 INFO L131 PetriNetUnfolder]: For 57295/57299 co-relation queries the response was YES. [2022-11-25 17:54:42,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31924 conditions, 3965 events. 2112/3965 cut-off events. For 57295/57299 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27225 event pairs, 230 based on Foata normal form. 156/4121 useless extension candidates. Maximal degree in co-relation 31877. Up to 2011 conditions per place. [2022-11-25 17:54:42,277 INFO L137 encePairwiseOnDemand]: 290/298 looper letters, 130 selfloop transitions, 123 changer transitions 11/268 dead transitions. [2022-11-25 17:54:42,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 268 transitions, 4403 flow [2022-11-25 17:54:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:54:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:54:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1627 transitions. [2022-11-25 17:54:42,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41997934950955085 [2022-11-25 17:54:42,281 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1627 transitions. [2022-11-25 17:54:42,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1627 transitions. [2022-11-25 17:54:42,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:42,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1627 transitions. [2022-11-25 17:54:42,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 125.15384615384616) internal successors, (1627), 13 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:42,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 298.0) internal successors, (4172), 14 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:42,290 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 298.0) internal successors, (4172), 14 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:42,290 INFO L175 Difference]: Start difference. First operand has 162 places, 195 transitions, 2707 flow. Second operand 13 states and 1627 transitions. [2022-11-25 17:54:42,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 268 transitions, 4403 flow [2022-11-25 17:54:42,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 268 transitions, 4282 flow, removed 26 selfloop flow, removed 12 redundant places. [2022-11-25 17:54:42,477 INFO L231 Difference]: Finished difference. Result has 153 places, 235 transitions, 4021 flow [2022-11-25 17:54:42,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4021, PETRI_PLACES=153, PETRI_TRANSITIONS=235} [2022-11-25 17:54:42,478 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 122 predicate places. [2022-11-25 17:54:42,479 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 235 transitions, 4021 flow [2022-11-25 17:54:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.0) internal successors, (2074), 17 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:42,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:42,479 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:42,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:42,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:54:42,686 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:54:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:42,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1008550110, now seen corresponding path program 4 times [2022-11-25 17:54:42,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:42,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77897305] [2022-11-25 17:54:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:42,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:43,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77897305] [2022-11-25 17:54:43,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77897305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:43,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91124374] [2022-11-25 17:54:43,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:54:43,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:43,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:43,499 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:43,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:54:43,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:54:43,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:54:43,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:43,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:54:43,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:54:43,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:54:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:54:44,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 17:54:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:44,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:44,489 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_884 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_884) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)) is different from false [2022-11-25 17:54:45,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:45,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 92 [2022-11-25 17:54:45,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:45,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 297 [2022-11-25 17:54:45,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:45,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 148 treesize of output 161 [2022-11-25 17:54:45,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:45,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 118 [2022-11-25 17:54:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:46,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91124374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:46,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:46,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-11-25 17:54:46,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809625142] [2022-11-25 17:54:46,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:46,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:54:46,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:54:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=582, Unknown=2, NotChecked=50, Total=756 [2022-11-25 17:54:46,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 298 [2022-11-25 17:54:46,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 235 transitions, 4021 flow. Second operand has 28 states, 28 states have (on average 82.28571428571429) internal successors, (2304), 28 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:46,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:46,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 298 [2022-11-25 17:54:46,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:50,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:53,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:55,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:59,107 INFO L130 PetriNetUnfolder]: 2401/4585 cut-off events. [2022-11-25 17:54:59,107 INFO L131 PetriNetUnfolder]: For 77842/77843 co-relation queries the response was YES. [2022-11-25 17:54:59,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39948 conditions, 4585 events. 2401/4585 cut-off events. For 77842/77843 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33206 event pairs, 332 based on Foata normal form. 93/4622 useless extension candidates. Maximal degree in co-relation 39899. Up to 3036 conditions per place. [2022-11-25 17:54:59,152 INFO L137 encePairwiseOnDemand]: 287/298 looper letters, 172 selfloop transitions, 148 changer transitions 17/338 dead transitions. [2022-11-25 17:54:59,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 338 transitions, 6342 flow [2022-11-25 17:54:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:54:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:54:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2114 transitions. [2022-11-25 17:54:59,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28375838926174496 [2022-11-25 17:54:59,156 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2114 transitions. [2022-11-25 17:54:59,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2114 transitions. [2022-11-25 17:54:59,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:59,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2114 transitions. [2022-11-25 17:54:59,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:59,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 298.0) internal successors, (7748), 26 states have internal predecessors, (7748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:59,165 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 298.0) internal successors, (7748), 26 states have internal predecessors, (7748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:59,165 INFO L175 Difference]: Start difference. First operand has 153 places, 235 transitions, 4021 flow. Second operand 25 states and 2114 transitions. [2022-11-25 17:54:59,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 338 transitions, 6342 flow [2022-11-25 17:54:59,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 338 transitions, 5650 flow, removed 325 selfloop flow, removed 16 redundant places. [2022-11-25 17:54:59,678 INFO L231 Difference]: Finished difference. Result has 162 places, 286 transitions, 4974 flow [2022-11-25 17:54:59,678 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4974, PETRI_PLACES=162, PETRI_TRANSITIONS=286} [2022-11-25 17:54:59,679 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2022-11-25 17:54:59,679 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 286 transitions, 4974 flow [2022-11-25 17:54:59,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 82.28571428571429) internal successors, (2304), 28 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:59,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:59,680 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:59,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:59,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:54:59,883 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:54:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash -629818003, now seen corresponding path program 5 times [2022-11-25 17:54:59,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:59,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108206518] [2022-11-25 17:54:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:01,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:01,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108206518] [2022-11-25 17:55:01,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108206518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:01,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779755507] [2022-11-25 17:55:01,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:55:01,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:01,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:01,308 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:01,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:55:01,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:55:01,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:55:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:01,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:01,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:55:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:55:02,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:02,416 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 17:55:02,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 102 [2022-11-25 17:55:02,445 INFO L321 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2022-11-25 17:55:02,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 41 [2022-11-25 17:55:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:02,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779755507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:02,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:02,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 23 [2022-11-25 17:55:02,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841982464] [2022-11-25 17:55:02,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:02,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:55:02,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:02,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:55:02,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=490, Unknown=1, NotChecked=0, Total=600 [2022-11-25 17:55:03,730 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 298 [2022-11-25 17:55:03,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 286 transitions, 4974 flow. Second operand has 25 states, 25 states have (on average 93.36) internal successors, (2334), 25 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:03,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:03,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 298 [2022-11-25 17:55:03,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:07,127 INFO L130 PetriNetUnfolder]: 2551/4848 cut-off events. [2022-11-25 17:55:07,128 INFO L131 PetriNetUnfolder]: For 82358/82360 co-relation queries the response was YES. [2022-11-25 17:55:07,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41754 conditions, 4848 events. 2551/4848 cut-off events. For 82358/82360 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35350 event pairs, 244 based on Foata normal form. 180/5019 useless extension candidates. Maximal degree in co-relation 41702. Up to 3563 conditions per place. [2022-11-25 17:55:07,275 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 222 selfloop transitions, 204 changer transitions 1/432 dead transitions. [2022-11-25 17:55:07,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 432 transitions, 8062 flow [2022-11-25 17:55:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:55:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 17:55:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2615 transitions. [2022-11-25 17:55:07,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3250062142679592 [2022-11-25 17:55:07,279 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2615 transitions. [2022-11-25 17:55:07,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2615 transitions. [2022-11-25 17:55:07,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:07,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2615 transitions. [2022-11-25 17:55:07,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 96.85185185185185) internal successors, (2615), 27 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 298.0) internal successors, (8344), 28 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,294 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 298.0) internal successors, (8344), 28 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,294 INFO L175 Difference]: Start difference. First operand has 162 places, 286 transitions, 4974 flow. Second operand 27 states and 2615 transitions. [2022-11-25 17:55:07,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 432 transitions, 8062 flow [2022-11-25 17:55:07,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 432 transitions, 7446 flow, removed 268 selfloop flow, removed 11 redundant places. [2022-11-25 17:55:07,664 INFO L231 Difference]: Finished difference. Result has 170 places, 367 transitions, 6730 flow [2022-11-25 17:55:07,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6730, PETRI_PLACES=170, PETRI_TRANSITIONS=367} [2022-11-25 17:55:07,665 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 139 predicate places. [2022-11-25 17:55:07,665 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 367 transitions, 6730 flow [2022-11-25 17:55:07,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.36) internal successors, (2334), 25 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:07,665 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:07,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:07,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:07,866 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:55:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash -422784717, now seen corresponding path program 2 times [2022-11-25 17:55:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:07,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983856001] [2022-11-25 17:55:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:07,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:08,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:08,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983856001] [2022-11-25 17:55:08,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983856001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:08,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710488421] [2022-11-25 17:55:08,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:55:08,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:08,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:08,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:08,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:55:08,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:55:08,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:55:08,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:55:09,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:09,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:09,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-11-25 17:55:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:09,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710488421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:09,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:09,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 21 [2022-11-25 17:55:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063815421] [2022-11-25 17:55:09,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:09,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:55:09,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:55:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:55:11,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 298 [2022-11-25 17:55:11,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 367 transitions, 6730 flow. Second operand has 23 states, 23 states have (on average 107.56521739130434) internal successors, (2474), 23 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:11,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:11,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 298 [2022-11-25 17:55:11,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:14,458 INFO L130 PetriNetUnfolder]: 2335/4425 cut-off events. [2022-11-25 17:55:14,458 INFO L131 PetriNetUnfolder]: For 71130/71130 co-relation queries the response was YES. [2022-11-25 17:55:14,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38186 conditions, 4425 events. 2335/4425 cut-off events. For 71130/71130 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31702 event pairs, 261 based on Foata normal form. 164/4589 useless extension candidates. Maximal degree in co-relation 38126. Up to 2643 conditions per place. [2022-11-25 17:55:14,500 INFO L137 encePairwiseOnDemand]: 287/298 looper letters, 254 selfloop transitions, 171 changer transitions 4/430 dead transitions. [2022-11-25 17:55:14,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 430 transitions, 8257 flow [2022-11-25 17:55:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:55:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 17:55:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2972 transitions. [2022-11-25 17:55:14,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3693760874968929 [2022-11-25 17:55:14,504 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2972 transitions. [2022-11-25 17:55:14,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2972 transitions. [2022-11-25 17:55:14,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:14,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2972 transitions. [2022-11-25 17:55:14,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 110.07407407407408) internal successors, (2972), 27 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:14,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 298.0) internal successors, (8344), 28 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:14,519 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 298.0) internal successors, (8344), 28 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:14,519 INFO L175 Difference]: Start difference. First operand has 170 places, 367 transitions, 6730 flow. Second operand 27 states and 2972 transitions. [2022-11-25 17:55:14,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 430 transitions, 8257 flow [2022-11-25 17:55:14,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 430 transitions, 7766 flow, removed 197 selfloop flow, removed 10 redundant places. [2022-11-25 17:55:14,870 INFO L231 Difference]: Finished difference. Result has 186 places, 374 transitions, 6691 flow [2022-11-25 17:55:14,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6691, PETRI_PLACES=186, PETRI_TRANSITIONS=374} [2022-11-25 17:55:14,871 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 155 predicate places. [2022-11-25 17:55:14,871 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 374 transitions, 6691 flow [2022-11-25 17:55:14,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 107.56521739130434) internal successors, (2474), 23 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:14,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:14,872 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:14,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:15,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:15,078 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:55:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash -629812423, now seen corresponding path program 6 times [2022-11-25 17:55:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:15,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895093318] [2022-11-25 17:55:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:15,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:17,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:17,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895093318] [2022-11-25 17:55:17,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895093318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:17,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133972926] [2022-11-25 17:55:17,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:55:17,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:17,048 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:17,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:55:17,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:55:17,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:17,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:55:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:17,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:17,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:55:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:55:17,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:18,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:18,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 116 [2022-11-25 17:55:18,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:18,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 55 [2022-11-25 17:55:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:18,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133972926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:18,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:18,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 23 [2022-11-25 17:55:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708720959] [2022-11-25 17:55:18,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:18,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:55:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:55:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=528, Unknown=1, NotChecked=0, Total=600 [2022-11-25 17:55:19,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 298 [2022-11-25 17:55:19,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 374 transitions, 6691 flow. Second operand has 25 states, 25 states have (on average 93.36) internal successors, (2334), 25 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:19,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:19,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 298 [2022-11-25 17:55:19,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:23,054 INFO L130 PetriNetUnfolder]: 2539/4817 cut-off events. [2022-11-25 17:55:23,054 INFO L131 PetriNetUnfolder]: For 77713/77713 co-relation queries the response was YES. [2022-11-25 17:55:23,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40934 conditions, 4817 events. 2539/4817 cut-off events. For 77713/77713 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 35253 event pairs, 222 based on Foata normal form. 170/4987 useless extension candidates. Maximal degree in co-relation 40874. Up to 3170 conditions per place. [2022-11-25 17:55:23,096 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 325 selfloop transitions, 174 changer transitions 0/504 dead transitions. [2022-11-25 17:55:23,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 504 transitions, 9603 flow [2022-11-25 17:55:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:55:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:55:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2134 transitions. [2022-11-25 17:55:23,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32550335570469796 [2022-11-25 17:55:23,110 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2134 transitions. [2022-11-25 17:55:23,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2134 transitions. [2022-11-25 17:55:23,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:23,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2134 transitions. [2022-11-25 17:55:23,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:23,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 298.0) internal successors, (6854), 23 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:23,122 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 298.0) internal successors, (6854), 23 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:23,122 INFO L175 Difference]: Start difference. First operand has 186 places, 374 transitions, 6691 flow. Second operand 22 states and 2134 transitions. [2022-11-25 17:55:23,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 504 transitions, 9603 flow [2022-11-25 17:55:23,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 504 transitions, 9173 flow, removed 131 selfloop flow, removed 16 redundant places. [2022-11-25 17:55:23,471 INFO L231 Difference]: Finished difference. Result has 194 places, 407 transitions, 7424 flow [2022-11-25 17:55:23,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7424, PETRI_PLACES=194, PETRI_TRANSITIONS=407} [2022-11-25 17:55:23,472 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 163 predicate places. [2022-11-25 17:55:23,472 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 407 transitions, 7424 flow [2022-11-25 17:55:23,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.36) internal successors, (2334), 25 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:23,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:23,473 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:23,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:23,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 17:55:23,673 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:55:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1296847181, now seen corresponding path program 3 times [2022-11-25 17:55:23,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:23,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885547648] [2022-11-25 17:55:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:23,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:24,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:24,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885547648] [2022-11-25 17:55:24,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885547648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:24,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425924976] [2022-11-25 17:55:24,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:55:24,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:24,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:24,725 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:24,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:55:24,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:55:24,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:24,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:55:24,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:25,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:55:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:25,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:25,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:25,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-25 17:55:25,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-11-25 17:55:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:25,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425924976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:25,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:25,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2022-11-25 17:55:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990687333] [2022-11-25 17:55:25,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:25,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:55:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:55:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=665, Unknown=4, NotChecked=0, Total=756 [2022-11-25 17:55:28,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 298 [2022-11-25 17:55:28,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 407 transitions, 7424 flow. Second operand has 28 states, 28 states have (on average 85.35714285714286) internal successors, (2390), 28 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:28,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:28,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 298 [2022-11-25 17:55:28,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:32,486 INFO L130 PetriNetUnfolder]: 2428/4686 cut-off events. [2022-11-25 17:55:32,486 INFO L131 PetriNetUnfolder]: For 82382/82382 co-relation queries the response was YES. [2022-11-25 17:55:32,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41110 conditions, 4686 events. 2428/4686 cut-off events. For 82382/82382 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 34597 event pairs, 30 based on Foata normal form. 234/4920 useless extension candidates. Maximal degree in co-relation 41047. Up to 2031 conditions per place. [2022-11-25 17:55:32,532 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 141 selfloop transitions, 321 changer transitions 0/463 dead transitions. [2022-11-25 17:55:32,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 463 transitions, 8868 flow [2022-11-25 17:55:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:55:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:55:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2480 transitions. [2022-11-25 17:55:32,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2972195589645254 [2022-11-25 17:55:32,537 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2480 transitions. [2022-11-25 17:55:32,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2480 transitions. [2022-11-25 17:55:32,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:32,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2480 transitions. [2022-11-25 17:55:32,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 88.57142857142857) internal successors, (2480), 28 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:32,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 298.0) internal successors, (8642), 29 states have internal predecessors, (8642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:32,551 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 298.0) internal successors, (8642), 29 states have internal predecessors, (8642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:32,551 INFO L175 Difference]: Start difference. First operand has 194 places, 407 transitions, 7424 flow. Second operand 28 states and 2480 transitions. [2022-11-25 17:55:32,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 463 transitions, 8868 flow [2022-11-25 17:55:33,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 463 transitions, 8543 flow, removed 97 selfloop flow, removed 17 redundant places. [2022-11-25 17:55:33,103 INFO L231 Difference]: Finished difference. Result has 204 places, 393 transitions, 7817 flow [2022-11-25 17:55:33,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=6558, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7817, PETRI_PLACES=204, PETRI_TRANSITIONS=393} [2022-11-25 17:55:33,104 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 173 predicate places. [2022-11-25 17:55:33,105 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 393 transitions, 7817 flow [2022-11-25 17:55:33,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.35714285714286) internal successors, (2390), 28 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:33,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:33,105 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:33,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-25 17:55:33,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 17:55:33,312 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:55:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash -193831193, now seen corresponding path program 3 times [2022-11-25 17:55:33,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:33,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097015016] [2022-11-25 17:55:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:33,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:33,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:33,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097015016] [2022-11-25 17:55:33,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097015016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:33,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650683675] [2022-11-25 17:55:33,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:55:33,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:33,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:33,987 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:33,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:55:34,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:55:34,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:55:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:34,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:34,577 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:55:34,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2022-11-25 17:55:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:34,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650683675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:34,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:34,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2022-11-25 17:55:34,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836220511] [2022-11-25 17:55:34,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:34,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:55:34,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:34,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:55:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:55:35,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 298 [2022-11-25 17:55:35,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 393 transitions, 7817 flow. Second operand has 21 states, 21 states have (on average 114.42857142857143) internal successors, (2403), 21 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:35,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:35,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 298 [2022-11-25 17:55:35,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:38,445 INFO L130 PetriNetUnfolder]: 2798/5417 cut-off events. [2022-11-25 17:55:38,445 INFO L131 PetriNetUnfolder]: For 111177/111179 co-relation queries the response was YES. [2022-11-25 17:55:38,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50216 conditions, 5417 events. 2798/5417 cut-off events. For 111177/111179 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41550 event pairs, 187 based on Foata normal form. 132/5548 useless extension candidates. Maximal degree in co-relation 50151. Up to 2362 conditions per place. [2022-11-25 17:55:38,503 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 212 selfloop transitions, 336 changer transitions 0/553 dead transitions. [2022-11-25 17:55:38,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 553 transitions, 11554 flow [2022-11-25 17:55:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:55:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:55:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2859 transitions. [2022-11-25 17:55:38,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.399748322147651 [2022-11-25 17:55:38,508 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2859 transitions. [2022-11-25 17:55:38,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2859 transitions. [2022-11-25 17:55:38,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:38,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2859 transitions. [2022-11-25 17:55:38,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 119.125) internal successors, (2859), 24 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:38,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 298.0) internal successors, (7450), 25 states have internal predecessors, (7450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:38,517 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 298.0) internal successors, (7450), 25 states have internal predecessors, (7450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:38,517 INFO L175 Difference]: Start difference. First operand has 204 places, 393 transitions, 7817 flow. Second operand 24 states and 2859 transitions. [2022-11-25 17:55:38,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 553 transitions, 11554 flow [2022-11-25 17:55:39,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 553 transitions, 10689 flow, removed 345 selfloop flow, removed 15 redundant places. [2022-11-25 17:55:39,376 INFO L231 Difference]: Finished difference. Result has 216 places, 490 transitions, 10214 flow [2022-11-25 17:55:39,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=7160, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10214, PETRI_PLACES=216, PETRI_TRANSITIONS=490} [2022-11-25 17:55:39,377 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2022-11-25 17:55:39,377 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 490 transitions, 10214 flow [2022-11-25 17:55:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 114.42857142857143) internal successors, (2403), 21 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:39,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:39,378 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:39,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:39,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:39,579 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:55:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash -312518769, now seen corresponding path program 3 times [2022-11-25 17:55:39,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:39,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200376282] [2022-11-25 17:55:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:39,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:40,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200376282] [2022-11-25 17:55:40,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200376282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243904277] [2022-11-25 17:55:40,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:55:40,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:40,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:40,319 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:55:40,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:55:40,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:55:40,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:40,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:55:40,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:55:40,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:55:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:41,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:41,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:41,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-25 17:55:42,006 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:55:42,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 144 [2022-11-25 17:55:42,021 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-25 17:55:42,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 109 [2022-11-25 17:55:42,037 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-25 17:55:42,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 71 [2022-11-25 17:55:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:42,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243904277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:42,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:42,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-11-25 17:55:42,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821531619] [2022-11-25 17:55:42,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:42,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:55:42,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:55:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=935, Unknown=2, NotChecked=0, Total=1122 [2022-11-25 17:55:44,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:46,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:48,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:52,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:53,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:55:53,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 490 transitions, 10214 flow. Second operand has 34 states, 34 states have (on average 90.23529411764706) internal successors, (3068), 34 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:53,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:53,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:55:53,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:04,949 INFO L130 PetriNetUnfolder]: 2071/4086 cut-off events. [2022-11-25 17:56:04,949 INFO L131 PetriNetUnfolder]: For 81493/81493 co-relation queries the response was YES. [2022-11-25 17:56:04,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37823 conditions, 4086 events. 2071/4086 cut-off events. For 81493/81493 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29779 event pairs, 596 based on Foata normal form. 108/4174 useless extension candidates. Maximal degree in co-relation 37753. Up to 2668 conditions per place. [2022-11-25 17:56:04,990 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 453 selfloop transitions, 128 changer transitions 2/588 dead transitions. [2022-11-25 17:56:04,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 588 transitions, 12390 flow [2022-11-25 17:56:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:56:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 17:56:04,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3466 transitions. [2022-11-25 17:56:04,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3143479049519318 [2022-11-25 17:56:04,996 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3466 transitions. [2022-11-25 17:56:04,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3466 transitions. [2022-11-25 17:56:04,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:04,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3466 transitions. [2022-11-25 17:56:05,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 93.67567567567568) internal successors, (3466), 37 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:05,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 298.0) internal successors, (11324), 38 states have internal predecessors, (11324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:05,011 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 298.0) internal successors, (11324), 38 states have internal predecessors, (11324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:05,011 INFO L175 Difference]: Start difference. First operand has 216 places, 490 transitions, 10214 flow. Second operand 37 states and 3466 transitions. [2022-11-25 17:56:05,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 588 transitions, 12390 flow [2022-11-25 17:56:05,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 588 transitions, 10979 flow, removed 309 selfloop flow, removed 14 redundant places. [2022-11-25 17:56:05,532 INFO L231 Difference]: Finished difference. Result has 247 places, 441 transitions, 8456 flow [2022-11-25 17:56:05,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=7451, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8456, PETRI_PLACES=247, PETRI_TRANSITIONS=441} [2022-11-25 17:56:05,533 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 216 predicate places. [2022-11-25 17:56:05,533 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 441 transitions, 8456 flow [2022-11-25 17:56:05,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.23529411764706) internal successors, (3068), 34 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:05,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:05,534 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:56:05,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 17:56:05,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 17:56:05,741 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:56:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash -312518351, now seen corresponding path program 7 times [2022-11-25 17:56:05,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:05,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686772373] [2022-11-25 17:56:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:05,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:07,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:07,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686772373] [2022-11-25 17:56:07,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686772373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:56:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204023849] [2022-11-25 17:56:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:56:07,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:56:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:56:07,410 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:56:07,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:56:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-25 17:56:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:07,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:56:07,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:56:08,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:56:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:08,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:56:09,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:09,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 120 [2022-11-25 17:56:09,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:09,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 368 treesize of output 436 [2022-11-25 17:56:10,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:10,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 316 treesize of output 356 [2022-11-25 17:56:10,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:10,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 207 treesize of output 287 [2022-11-25 17:56:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:21,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204023849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:56:21,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:56:21,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2022-11-25 17:56:21,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286622180] [2022-11-25 17:56:21,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:56:21,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:56:21,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:56:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1086, Unknown=1, NotChecked=0, Total=1332 [2022-11-25 17:56:23,156 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 298 [2022-11-25 17:56:23,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 441 transitions, 8456 flow. Second operand has 37 states, 37 states have (on average 82.21621621621621) internal successors, (3042), 37 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:23,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:23,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 298 [2022-11-25 17:56:23,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:30,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:33,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:36,751 INFO L130 PetriNetUnfolder]: 2786/5253 cut-off events. [2022-11-25 17:56:36,751 INFO L131 PetriNetUnfolder]: For 103268/103268 co-relation queries the response was YES. [2022-11-25 17:56:36,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47451 conditions, 5253 events. 2786/5253 cut-off events. For 103268/103268 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37980 event pairs, 209 based on Foata normal form. 42/5263 useless extension candidates. Maximal degree in co-relation 47376. Up to 1989 conditions per place. [2022-11-25 17:56:36,941 INFO L137 encePairwiseOnDemand]: 287/298 looper letters, 302 selfloop transitions, 454 changer transitions 6/763 dead transitions. [2022-11-25 17:56:36,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 763 transitions, 15122 flow [2022-11-25 17:56:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 17:56:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-25 17:56:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4704 transitions. [2022-11-25 17:56:36,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28700427089688835 [2022-11-25 17:56:36,948 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4704 transitions. [2022-11-25 17:56:36,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4704 transitions. [2022-11-25 17:56:36,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:36,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4704 transitions. [2022-11-25 17:56:36,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 85.52727272727273) internal successors, (4704), 55 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:36,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 298.0) internal successors, (16688), 56 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:36,970 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 298.0) internal successors, (16688), 56 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:36,971 INFO L175 Difference]: Start difference. First operand has 247 places, 441 transitions, 8456 flow. Second operand 55 states and 4704 transitions. [2022-11-25 17:56:36,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 763 transitions, 15122 flow [2022-11-25 17:56:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 763 transitions, 14449 flow, removed 244 selfloop flow, removed 19 redundant places. [2022-11-25 17:56:37,675 INFO L231 Difference]: Finished difference. Result has 302 places, 626 transitions, 13377 flow [2022-11-25 17:56:37,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=8027, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=13377, PETRI_PLACES=302, PETRI_TRANSITIONS=626} [2022-11-25 17:56:37,675 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 271 predicate places. [2022-11-25 17:56:37,676 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 626 transitions, 13377 flow [2022-11-25 17:56:37,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 82.21621621621621) internal successors, (3042), 37 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:37,676 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:56:37,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 17:56:37,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:56:37,877 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:56:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash 340677887, now seen corresponding path program 8 times [2022-11-25 17:56:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:37,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028968282] [2022-11-25 17:56:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:39,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:39,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028968282] [2022-11-25 17:56:39,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028968282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:56:39,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697863255] [2022-11-25 17:56:39,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:56:39,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:56:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:56:39,206 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:56:39,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 17:56:39,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:56:39,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:56:39,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 17:56:39,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:39,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:56:39,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:56:39,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:39,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:56:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:40,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:56:43,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:43,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 117 [2022-11-25 17:56:43,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:43,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 396 [2022-11-25 17:56:43,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:43,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 264 [2022-11-25 17:56:43,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:43,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 179 treesize of output 259 [2022-11-25 17:56:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:56,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697863255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:56:56,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:56:56,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:56:56,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431518101] [2022-11-25 17:56:56,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:56:56,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:56:56,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:56,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:56:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=983, Unknown=4, NotChecked=0, Total=1190 [2022-11-25 17:56:58,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:00,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:02,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:06,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:08,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:10,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:12,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:15,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:15,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:57:15,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 626 transitions, 13377 flow. Second operand has 35 states, 35 states have (on average 90.2) internal successors, (3157), 35 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:57:15,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:15,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:57:15,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:18,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:20,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:37,617 WARN L233 SmtUtils]: Spent 16.45s on a formula simplification. DAG size of input: 111 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:57:56,010 WARN L233 SmtUtils]: Spent 16.42s on a formula simplification. DAG size of input: 116 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:58:03,037 INFO L130 PetriNetUnfolder]: 2603/4963 cut-off events. [2022-11-25 17:58:03,037 INFO L131 PetriNetUnfolder]: For 129033/129046 co-relation queries the response was YES. [2022-11-25 17:58:03,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48837 conditions, 4963 events. 2603/4963 cut-off events. For 129033/129046 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 36134 event pairs, 419 based on Foata normal form. 299/5258 useless extension candidates. Maximal degree in co-relation 48744. Up to 3453 conditions per place. [2022-11-25 17:58:03,093 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 517 selfloop transitions, 317 changer transitions 2/845 dead transitions. [2022-11-25 17:58:03,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 845 transitions, 18512 flow [2022-11-25 17:58:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 17:58:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-25 17:58:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4883 transitions. [2022-11-25 17:58:03,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31511357769747034 [2022-11-25 17:58:03,101 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4883 transitions. [2022-11-25 17:58:03,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4883 transitions. [2022-11-25 17:58:03,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:03,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4883 transitions. [2022-11-25 17:58:03,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 93.90384615384616) internal successors, (4883), 52 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:03,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 298.0) internal successors, (15794), 53 states have internal predecessors, (15794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:03,132 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 298.0) internal successors, (15794), 53 states have internal predecessors, (15794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:03,132 INFO L175 Difference]: Start difference. First operand has 302 places, 626 transitions, 13377 flow. Second operand 52 states and 4883 transitions. [2022-11-25 17:58:03,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 845 transitions, 18512 flow [2022-11-25 17:58:04,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 845 transitions, 17036 flow, removed 667 selfloop flow, removed 21 redundant places. [2022-11-25 17:58:04,480 INFO L231 Difference]: Finished difference. Result has 349 places, 722 transitions, 15459 flow [2022-11-25 17:58:04,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=11175, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=15459, PETRI_PLACES=349, PETRI_TRANSITIONS=722} [2022-11-25 17:58:04,481 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 318 predicate places. [2022-11-25 17:58:04,481 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 722 transitions, 15459 flow [2022-11-25 17:58:04,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 90.2) internal successors, (3157), 35 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:04,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:04,482 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:04,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:04,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 17:58:04,682 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:58:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1677324619, now seen corresponding path program 4 times [2022-11-25 17:58:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:04,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586694779] [2022-11-25 17:58:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:05,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:05,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586694779] [2022-11-25 17:58:05,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586694779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:05,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752323616] [2022-11-25 17:58:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:58:05,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:05,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:05,325 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:05,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 17:58:05,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:58:05,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:58:05,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:05,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:58:05,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:58:05,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:58:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:06,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:06,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:58:06,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2022-11-25 17:58:06,814 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 17:58:06,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 287 [2022-11-25 17:58:06,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:58:06,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 185 [2022-11-25 17:58:06,846 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 17:58:06,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 196 [2022-11-25 17:58:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:07,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752323616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:07,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:07,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-11-25 17:58:07,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181228743] [2022-11-25 17:58:07,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:07,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:58:07,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:58:07,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=913, Unknown=8, NotChecked=0, Total=1122 [2022-11-25 17:58:09,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:12,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:12,247 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:58:12,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 722 transitions, 15459 flow. Second operand has 34 states, 34 states have (on average 90.23529411764706) internal successors, (3068), 34 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:12,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:12,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:58:12,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:15,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:17,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:20,229 INFO L130 PetriNetUnfolder]: 2351/4531 cut-off events. [2022-11-25 17:58:20,229 INFO L131 PetriNetUnfolder]: For 116058/116068 co-relation queries the response was YES. [2022-11-25 17:58:20,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45524 conditions, 4531 events. 2351/4531 cut-off events. For 116058/116068 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32869 event pairs, 410 based on Foata normal form. 108/4638 useless extension candidates. Maximal degree in co-relation 45418. Up to 3520 conditions per place. [2022-11-25 17:58:20,275 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 476 selfloop transitions, 194 changer transitions 13/692 dead transitions. [2022-11-25 17:58:20,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 692 transitions, 15362 flow [2022-11-25 17:58:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:58:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:58:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2612 transitions. [2022-11-25 17:58:20,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.313039309683605 [2022-11-25 17:58:20,279 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2612 transitions. [2022-11-25 17:58:20,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2612 transitions. [2022-11-25 17:58:20,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:20,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2612 transitions. [2022-11-25 17:58:20,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 93.28571428571429) internal successors, (2612), 28 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:20,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 298.0) internal successors, (8642), 29 states have internal predecessors, (8642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:20,290 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 298.0) internal successors, (8642), 29 states have internal predecessors, (8642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:20,291 INFO L175 Difference]: Start difference. First operand has 349 places, 722 transitions, 15459 flow. Second operand 28 states and 2612 transitions. [2022-11-25 17:58:20,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 692 transitions, 15362 flow [2022-11-25 17:58:21,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 692 transitions, 14561 flow, removed 320 selfloop flow, removed 26 redundant places. [2022-11-25 17:58:21,321 INFO L231 Difference]: Finished difference. Result has 355 places, 625 transitions, 13085 flow [2022-11-25 17:58:21,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=12549, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13085, PETRI_PLACES=355, PETRI_TRANSITIONS=625} [2022-11-25 17:58:21,322 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 324 predicate places. [2022-11-25 17:58:21,322 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 625 transitions, 13085 flow [2022-11-25 17:58:21,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.23529411764706) internal successors, (3068), 34 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:21,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:21,323 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:21,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 17:58:21,523 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:58:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash -633863739, now seen corresponding path program 4 times [2022-11-25 17:58:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:21,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012514019] [2022-11-25 17:58:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:22,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012514019] [2022-11-25 17:58:22,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012514019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100425709] [2022-11-25 17:58:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:58:22,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:22,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:22,670 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:22,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 17:58:22,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:58:22,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 17:58:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:58:23,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-25 17:58:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:23,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:23,662 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1284 (Array Int Int))) (< 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1284) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset 8)) 1)))) is different from false [2022-11-25 17:58:23,807 INFO L321 Elim1Store]: treesize reduction 12, result has 82.6 percent of original size [2022-11-25 17:58:23,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 100 [2022-11-25 17:58:23,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:58:23,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 6 [2022-11-25 17:58:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:24,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100425709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:24,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2022-11-25 17:58:24,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603750860] [2022-11-25 17:58:24,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:58:24,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:24,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:58:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1098, Unknown=1, NotChecked=68, Total=1332 [2022-11-25 17:58:24,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 298 [2022-11-25 17:58:24,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 625 transitions, 13085 flow. Second operand has 37 states, 37 states have (on average 85.21621621621621) internal successors, (3153), 37 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:24,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:24,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 298 [2022-11-25 17:58:24,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:29,731 INFO L130 PetriNetUnfolder]: 2347/4509 cut-off events. [2022-11-25 17:58:29,731 INFO L131 PetriNetUnfolder]: For 112027/112028 co-relation queries the response was YES. [2022-11-25 17:58:29,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45133 conditions, 4509 events. 2347/4509 cut-off events. For 112027/112028 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32547 event pairs, 311 based on Foata normal form. 31/4540 useless extension candidates. Maximal degree in co-relation 45027. Up to 1615 conditions per place. [2022-11-25 17:58:29,780 INFO L137 encePairwiseOnDemand]: 287/298 looper letters, 357 selfloop transitions, 302 changer transitions 18/678 dead transitions. [2022-11-25 17:58:29,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 678 transitions, 15094 flow [2022-11-25 17:58:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:58:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:58:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2210 transitions. [2022-11-25 17:58:29,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2966442953020134 [2022-11-25 17:58:29,785 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2210 transitions. [2022-11-25 17:58:29,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2210 transitions. [2022-11-25 17:58:29,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:29,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2210 transitions. [2022-11-25 17:58:29,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 88.4) internal successors, (2210), 25 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:29,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 298.0) internal successors, (7748), 26 states have internal predecessors, (7748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:29,795 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 298.0) internal successors, (7748), 26 states have internal predecessors, (7748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:29,795 INFO L175 Difference]: Start difference. First operand has 355 places, 625 transitions, 13085 flow. Second operand 25 states and 2210 transitions. [2022-11-25 17:58:29,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 678 transitions, 15094 flow [2022-11-25 17:58:30,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 678 transitions, 14813 flow, removed 56 selfloop flow, removed 17 redundant places. [2022-11-25 17:58:30,955 INFO L231 Difference]: Finished difference. Result has 362 places, 615 transitions, 13248 flow [2022-11-25 17:58:30,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=12729, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13248, PETRI_PLACES=362, PETRI_TRANSITIONS=615} [2022-11-25 17:58:30,956 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 331 predicate places. [2022-11-25 17:58:30,956 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 615 transitions, 13248 flow [2022-11-25 17:58:30,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 85.21621621621621) internal successors, (3153), 37 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:30,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:30,957 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:30,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:31,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 17:58:31,166 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:58:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:31,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1472375707, now seen corresponding path program 5 times [2022-11-25 17:58:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:31,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875178009] [2022-11-25 17:58:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:31,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:32,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875178009] [2022-11-25 17:58:32,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875178009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152649023] [2022-11-25 17:58:32,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:58:32,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:32,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:32,004 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:32,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 17:58:32,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:58:32,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 17:58:32,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:32,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:58:32,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:58:32,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:58:32,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:58:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:58:32,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 17:58:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:32,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:33,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:58:33,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 179 treesize of output 105 [2022-11-25 17:58:33,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:58:33,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 297 [2022-11-25 17:58:33,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 144 [2022-11-25 17:58:33,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:58:33,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 206 [2022-11-25 17:58:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:34,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152649023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:34,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:34,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-25 17:58:34,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762216542] [2022-11-25 17:58:34,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:34,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:58:34,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:58:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=833, Unknown=4, NotChecked=0, Total=992 [2022-11-25 17:58:36,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:39,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:41,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:43,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:45,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:47,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:47,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 17:58:47,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 615 transitions, 13248 flow. Second operand has 32 states, 32 states have (on average 90.21875) internal successors, (2887), 32 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:47,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:47,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 17:58:47,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:50,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:59:05,265 WARN L233 SmtUtils]: Spent 10.18s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:59:08,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:59:10,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:59:12,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:59:14,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:59:18,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:59:20,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:59:21,348 INFO L130 PetriNetUnfolder]: 2393/4610 cut-off events. [2022-11-25 17:59:21,348 INFO L131 PetriNetUnfolder]: For 131816/131826 co-relation queries the response was YES. [2022-11-25 17:59:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47712 conditions, 4610 events. 2393/4610 cut-off events. For 131816/131826 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33734 event pairs, 554 based on Foata normal form. 58/4667 useless extension candidates. Maximal degree in co-relation 47606. Up to 3887 conditions per place. [2022-11-25 17:59:21,394 INFO L137 encePairwiseOnDemand]: 290/298 looper letters, 553 selfloop transitions, 131 changer transitions 0/693 dead transitions. [2022-11-25 17:59:21,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 693 transitions, 15793 flow [2022-11-25 17:59:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:59:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 17:59:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2797 transitions. [2022-11-25 17:59:21,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31286353467561523 [2022-11-25 17:59:21,398 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2797 transitions. [2022-11-25 17:59:21,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2797 transitions. [2022-11-25 17:59:21,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:59:21,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2797 transitions. [2022-11-25 17:59:21,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 93.23333333333333) internal successors, (2797), 30 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:21,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 298.0) internal successors, (9238), 31 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:21,408 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 298.0) internal successors, (9238), 31 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:21,408 INFO L175 Difference]: Start difference. First operand has 362 places, 615 transitions, 13248 flow. Second operand 30 states and 2797 transitions. [2022-11-25 17:59:21,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 693 transitions, 15793 flow [2022-11-25 17:59:22,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 693 transitions, 15309 flow, removed 173 selfloop flow, removed 17 redundant places. [2022-11-25 17:59:22,443 INFO L231 Difference]: Finished difference. Result has 374 places, 625 transitions, 13336 flow [2022-11-25 17:59:22,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=12760, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13336, PETRI_PLACES=374, PETRI_TRANSITIONS=625} [2022-11-25 17:59:22,446 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 343 predicate places. [2022-11-25 17:59:22,446 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 625 transitions, 13336 flow [2022-11-25 17:59:22,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 90.21875) internal successors, (2887), 32 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:22,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:22,447 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:22,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 17:59:22,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 17:59:22,653 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:59:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash -879446454, now seen corresponding path program 5 times [2022-11-25 17:59:22,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:22,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346768217] [2022-11-25 17:59:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:22,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:59:24,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346768217] [2022-11-25 17:59:24,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346768217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:59:24,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431936285] [2022-11-25 17:59:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:59:24,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:59:24,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:59:24,698 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:59:24,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 17:59:24,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:59:24,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:59:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:59:24,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:59:25,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:59:25,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:59:25,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-11-25 17:59:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:59:25,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431936285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:59:25,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:59:25,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 21 [2022-11-25 17:59:25,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293825712] [2022-11-25 17:59:25,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:59:25,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:59:25,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:59:25,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:59:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:59:28,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 298 [2022-11-25 17:59:28,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 625 transitions, 13336 flow. Second operand has 23 states, 23 states have (on average 113.47826086956522) internal successors, (2610), 23 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:28,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:59:28,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 298 [2022-11-25 17:59:28,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:59:33,980 INFO L130 PetriNetUnfolder]: 2968/5634 cut-off events. [2022-11-25 17:59:33,980 INFO L131 PetriNetUnfolder]: For 167661/167671 co-relation queries the response was YES. [2022-11-25 17:59:34,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58785 conditions, 5634 events. 2968/5634 cut-off events. For 167661/167671 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 41935 event pairs, 252 based on Foata normal form. 170/5803 useless extension candidates. Maximal degree in co-relation 58677. Up to 2983 conditions per place. [2022-11-25 17:59:34,035 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 323 selfloop transitions, 523 changer transitions 8/863 dead transitions. [2022-11-25 17:59:34,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 863 transitions, 19728 flow [2022-11-25 17:59:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:59:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 17:59:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3179 transitions. [2022-11-25 17:59:34,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3951031568481233 [2022-11-25 17:59:34,038 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3179 transitions. [2022-11-25 17:59:34,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3179 transitions. [2022-11-25 17:59:34,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:59:34,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3179 transitions. [2022-11-25 17:59:34,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 117.74074074074075) internal successors, (3179), 27 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:34,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 298.0) internal successors, (8344), 28 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:34,045 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 298.0) internal successors, (8344), 28 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:34,045 INFO L175 Difference]: Start difference. First operand has 374 places, 625 transitions, 13336 flow. Second operand 27 states and 3179 transitions. [2022-11-25 17:59:34,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 863 transitions, 19728 flow [2022-11-25 17:59:35,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 863 transitions, 19463 flow, removed 31 selfloop flow, removed 22 redundant places. [2022-11-25 17:59:35,439 INFO L231 Difference]: Finished difference. Result has 380 places, 779 transitions, 17877 flow [2022-11-25 17:59:35,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=12946, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17877, PETRI_PLACES=380, PETRI_TRANSITIONS=779} [2022-11-25 17:59:35,440 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 349 predicate places. [2022-11-25 17:59:35,440 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 779 transitions, 17877 flow [2022-11-25 17:59:35,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 113.47826086956522) internal successors, (2610), 23 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:35,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:35,441 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:35,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 17:59:35,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-25 17:59:35,642 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:59:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash 270892816, now seen corresponding path program 6 times [2022-11-25 17:59:35,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:35,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749841396] [2022-11-25 17:59:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:35,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:37,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:59:37,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749841396] [2022-11-25 17:59:37,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749841396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:59:37,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141886805] [2022-11-25 17:59:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:59:37,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:59:37,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:59:37,966 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:59:37,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 17:59:38,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:59:38,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:59:38,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:59:38,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:59:38,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:59:38,601 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:59:38,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-25 17:59:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:59:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141886805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:59:38,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:59:38,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 26 [2022-11-25 17:59:38,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751531686] [2022-11-25 17:59:38,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:59:38,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:59:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:59:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:59:38,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:59:41,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 298 [2022-11-25 17:59:41,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 779 transitions, 17877 flow. Second operand has 28 states, 28 states have (on average 108.42857142857143) internal successors, (3036), 28 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:41,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:59:41,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 298 [2022-11-25 17:59:41,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:59:49,780 INFO L130 PetriNetUnfolder]: 3609/6929 cut-off events. [2022-11-25 17:59:49,780 INFO L131 PetriNetUnfolder]: For 227427/227428 co-relation queries the response was YES. [2022-11-25 17:59:49,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74896 conditions, 6929 events. 3609/6929 cut-off events. For 227427/227428 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 54713 event pairs, 38 based on Foata normal form. 559/7488 useless extension candidates. Maximal degree in co-relation 74787. Up to 2830 conditions per place. [2022-11-25 17:59:49,851 INFO L137 encePairwiseOnDemand]: 288/298 looper letters, 292 selfloop transitions, 729 changer transitions 126/1148 dead transitions. [2022-11-25 17:59:49,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1148 transitions, 26594 flow [2022-11-25 17:59:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-25 17:59:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-11-25 17:59:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 8525 transitions. [2022-11-25 17:59:49,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37641292829388906 [2022-11-25 17:59:49,858 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 8525 transitions. [2022-11-25 17:59:49,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 8525 transitions. [2022-11-25 17:59:49,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:59:49,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 8525 transitions. [2022-11-25 17:59:49,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 112.17105263157895) internal successors, (8525), 76 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:49,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 298.0) internal successors, (22946), 77 states have internal predecessors, (22946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:49,879 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 298.0) internal successors, (22946), 77 states have internal predecessors, (22946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:49,879 INFO L175 Difference]: Start difference. First operand has 380 places, 779 transitions, 17877 flow. Second operand 76 states and 8525 transitions. [2022-11-25 17:59:49,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1148 transitions, 26594 flow [2022-11-25 17:59:51,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1148 transitions, 25787 flow, removed 285 selfloop flow, removed 11 redundant places. [2022-11-25 17:59:51,984 INFO L231 Difference]: Finished difference. Result has 447 places, 806 transitions, 19295 flow [2022-11-25 17:59:51,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=16315, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=19295, PETRI_PLACES=447, PETRI_TRANSITIONS=806} [2022-11-25 17:59:51,985 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 416 predicate places. [2022-11-25 17:59:51,985 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 806 transitions, 19295 flow [2022-11-25 17:59:51,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 108.42857142857143) internal successors, (3036), 28 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:51,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:51,986 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:52,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 17:59:52,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-25 17:59:52,193 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:59:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash -633863693, now seen corresponding path program 9 times [2022-11-25 17:59:52,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:52,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306269571] [2022-11-25 17:59:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:52,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:53,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:59:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306269571] [2022-11-25 17:59:53,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306269571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:59:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550020273] [2022-11-25 17:59:53,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:59:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:59:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:59:53,510 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:59:53,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 17:59:53,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:59:53,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:59:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:59:53,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:59:53,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-11-25 17:59:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:59:54,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:59:56,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:59:56,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 176 [2022-11-25 17:59:56,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:59:56,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 7 [2022-11-25 17:59:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:59:57,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550020273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:59:57,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:59:57,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2022-11-25 17:59:57,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165247993] [2022-11-25 17:59:57,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:59:57,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:59:57,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:59:57,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:59:57,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=708, Unknown=2, NotChecked=0, Total=812 [2022-11-25 17:59:59,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:02,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:04,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:07,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:10,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:11,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 298 [2022-11-25 18:00:11,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 806 transitions, 19295 flow. Second operand has 29 states, 29 states have (on average 93.3103448275862) internal successors, (2706), 29 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:11,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:11,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 298 [2022-11-25 18:00:11,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:16,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:18,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:20,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:22,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:24,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:27,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:31,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:33,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:36,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:38,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:40,660 INFO L130 PetriNetUnfolder]: 3301/6372 cut-off events. [2022-11-25 18:00:40,660 INFO L131 PetriNetUnfolder]: For 220111/220124 co-relation queries the response was YES. [2022-11-25 18:00:40,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71000 conditions, 6372 events. 3301/6372 cut-off events. For 220111/220124 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 49827 event pairs, 154 based on Foata normal form. 223/6591 useless extension candidates. Maximal degree in co-relation 70885. Up to 3209 conditions per place. [2022-11-25 18:00:40,732 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 524 selfloop transitions, 332 changer transitions 12/879 dead transitions. [2022-11-25 18:00:40,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 879 transitions, 22187 flow [2022-11-25 18:00:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 18:00:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 18:00:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2889 transitions. [2022-11-25 18:00:40,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3231543624161074 [2022-11-25 18:00:40,736 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2889 transitions. [2022-11-25 18:00:40,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2889 transitions. [2022-11-25 18:00:40,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:40,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2889 transitions. [2022-11-25 18:00:40,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 96.3) internal successors, (2889), 30 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:40,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 298.0) internal successors, (9238), 31 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:40,743 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 298.0) internal successors, (9238), 31 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:40,743 INFO L175 Difference]: Start difference. First operand has 447 places, 806 transitions, 19295 flow. Second operand 30 states and 2889 transitions. [2022-11-25 18:00:40,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 879 transitions, 22187 flow [2022-11-25 18:00:42,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 879 transitions, 19668 flow, removed 847 selfloop flow, removed 36 redundant places. [2022-11-25 18:00:42,870 INFO L231 Difference]: Finished difference. Result has 425 places, 805 transitions, 17793 flow [2022-11-25 18:00:42,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=16571, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17793, PETRI_PLACES=425, PETRI_TRANSITIONS=805} [2022-11-25 18:00:42,872 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 394 predicate places. [2022-11-25 18:00:42,872 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 805 transitions, 17793 flow [2022-11-25 18:00:42,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 93.3103448275862) internal successors, (2706), 29 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:42,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:42,873 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:42,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 18:00:43,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-25 18:00:43,074 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:00:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1677324247, now seen corresponding path program 10 times [2022-11-25 18:00:43,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:43,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936413256] [2022-11-25 18:00:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:43,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:44,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:44,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936413256] [2022-11-25 18:00:44,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936413256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:44,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687510405] [2022-11-25 18:00:44,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:00:44,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:00:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:00:44,314 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:00:44,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 18:00:44,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:00:44,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:00:44,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 18:00:44,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:45,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 18:00:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:45,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:46,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:46,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 197 [2022-11-25 18:00:46,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:46,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 70 [2022-11-25 18:00:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:47,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687510405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:00:47,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:00:47,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2022-11-25 18:00:47,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479941033] [2022-11-25 18:00:47,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:47,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 18:00:47,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 18:00:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1098, Unknown=3, NotChecked=0, Total=1332 [2022-11-25 18:00:48,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 298 [2022-11-25 18:00:48,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 805 transitions, 17793 flow. Second operand has 37 states, 37 states have (on average 85.21621621621621) internal successors, (3153), 37 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:48,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:48,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 298 [2022-11-25 18:00:48,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:52,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:07,612 WARN L233 SmtUtils]: Spent 14.41s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:01:09,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:11,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:15,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:17,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:32,690 WARN L233 SmtUtils]: Spent 14.27s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:01:35,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:37,338 INFO L130 PetriNetUnfolder]: 3524/6732 cut-off events. [2022-11-25 18:01:37,338 INFO L131 PetriNetUnfolder]: For 179530/179531 co-relation queries the response was YES. [2022-11-25 18:01:37,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69701 conditions, 6732 events. 3524/6732 cut-off events. For 179530/179531 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 52493 event pairs, 213 based on Foata normal form. 61/6793 useless extension candidates. Maximal degree in co-relation 69592. Up to 2362 conditions per place. [2022-11-25 18:01:37,414 INFO L137 encePairwiseOnDemand]: 287/298 looper letters, 434 selfloop transitions, 524 changer transitions 9/968 dead transitions. [2022-11-25 18:01:37,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 968 transitions, 22597 flow [2022-11-25 18:01:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 18:01:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-25 18:01:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3951 transitions. [2022-11-25 18:01:37,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29463087248322145 [2022-11-25 18:01:37,418 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3951 transitions. [2022-11-25 18:01:37,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3951 transitions. [2022-11-25 18:01:37,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:37,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3951 transitions. [2022-11-25 18:01:37,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 87.8) internal successors, (3951), 45 states have internal predecessors, (3951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:37,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 298.0) internal successors, (13708), 46 states have internal predecessors, (13708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:37,428 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 298.0) internal successors, (13708), 46 states have internal predecessors, (13708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:37,428 INFO L175 Difference]: Start difference. First operand has 425 places, 805 transitions, 17793 flow. Second operand 45 states and 3951 transitions. [2022-11-25 18:01:37,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 968 transitions, 22597 flow [2022-11-25 18:01:39,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 968 transitions, 22207 flow, removed 97 selfloop flow, removed 17 redundant places. [2022-11-25 18:01:39,415 INFO L231 Difference]: Finished difference. Result has 458 places, 871 transitions, 20402 flow [2022-11-25 18:01:39,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=17383, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=20402, PETRI_PLACES=458, PETRI_TRANSITIONS=871} [2022-11-25 18:01:39,417 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 427 predicate places. [2022-11-25 18:01:39,417 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 871 transitions, 20402 flow [2022-11-25 18:01:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 85.21621621621621) internal successors, (3153), 37 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:39,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:39,418 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:39,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:39,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-25 18:01:39,624 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:01:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:39,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1677318667, now seen corresponding path program 11 times [2022-11-25 18:01:39,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:01:39,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496933595] [2022-11-25 18:01:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:01:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:40,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:01:40,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496933595] [2022-11-25 18:01:40,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496933595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:01:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815021745] [2022-11-25 18:01:40,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:01:40,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:01:40,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:01:40,933 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:01:40,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 18:01:41,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:01:41,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:41,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-25 18:01:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:41,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 18:01:41,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 18:01:41,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:01:41,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:01:41,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-25 18:01:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:42,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:45,427 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-25 18:01:45,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 214 treesize of output 133 [2022-11-25 18:01:45,687 INFO L321 Elim1Store]: treesize reduction 36, result has 84.5 percent of original size [2022-11-25 18:01:45,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 537 treesize of output 641 [2022-11-25 18:01:45,839 INFO L321 Elim1Store]: treesize reduction 36, result has 77.1 percent of original size [2022-11-25 18:01:45,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 432 treesize of output 488 [2022-11-25 18:01:45,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:01:45,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 268 [2022-11-25 18:02:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:40,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815021745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:40,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:40,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 18:02:40,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149819194] [2022-11-25 18:02:40,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:40,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 18:02:40,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 18:02:40,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1023, Unknown=4, NotChecked=0, Total=1190 [2022-11-25 18:02:43,152 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 18:02:43,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 871 transitions, 20402 flow. Second operand has 35 states, 35 states have (on average 90.2) internal successors, (3157), 35 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:43,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:43,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 18:02:43,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:49,987 INFO L130 PetriNetUnfolder]: 3504/6690 cut-off events. [2022-11-25 18:02:49,987 INFO L131 PetriNetUnfolder]: For 207707/207719 co-relation queries the response was YES. [2022-11-25 18:02:50,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73038 conditions, 6690 events. 3504/6690 cut-off events. For 207707/207719 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 52440 event pairs, 1308 based on Foata normal form. 8/6695 useless extension candidates. Maximal degree in co-relation 72920. Up to 6286 conditions per place. [2022-11-25 18:02:50,075 INFO L137 encePairwiseOnDemand]: 291/298 looper letters, 822 selfloop transitions, 63 changer transitions 6/902 dead transitions. [2022-11-25 18:02:50,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 902 transitions, 22578 flow [2022-11-25 18:02:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:02:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 18:02:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2034 transitions. [2022-11-25 18:02:50,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31025015253203175 [2022-11-25 18:02:50,078 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2034 transitions. [2022-11-25 18:02:50,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2034 transitions. [2022-11-25 18:02:50,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:50,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2034 transitions. [2022-11-25 18:02:50,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 92.45454545454545) internal successors, (2034), 22 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:50,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 298.0) internal successors, (6854), 23 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:50,083 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 298.0) internal successors, (6854), 23 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:50,083 INFO L175 Difference]: Start difference. First operand has 458 places, 871 transitions, 20402 flow. Second operand 22 states and 2034 transitions. [2022-11-25 18:02:50,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 902 transitions, 22578 flow [2022-11-25 18:02:52,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 902 transitions, 21671 flow, removed 285 selfloop flow, removed 30 redundant places. [2022-11-25 18:02:52,137 INFO L231 Difference]: Finished difference. Result has 444 places, 867 transitions, 19536 flow [2022-11-25 18:02:52,137 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=19480, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=19536, PETRI_PLACES=444, PETRI_TRANSITIONS=867} [2022-11-25 18:02:52,138 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 413 predicate places. [2022-11-25 18:02:52,138 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 867 transitions, 19536 flow [2022-11-25 18:02:52,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 90.2) internal successors, (3157), 35 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:52,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:52,139 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:52,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:52,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 18:02:52,340 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:02:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:52,340 INFO L85 PathProgramCache]: Analyzing trace with hash -883568863, now seen corresponding path program 12 times [2022-11-25 18:02:52,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:52,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53880434] [2022-11-25 18:02:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:52,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:02:52,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:52,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53880434] [2022-11-25 18:02:52,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53880434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:52,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145799502] [2022-11-25 18:02:52,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:02:52,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:52,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:52,489 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:52,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 18:02:52,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:02:52,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:52,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:02:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:02:52,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:02:52,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145799502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:52,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:52,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 13 [2022-11-25 18:02:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057795426] [2022-11-25 18:02:52,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:02:52,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:52,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:02:52,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:02:52,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 298 [2022-11-25 18:02:52,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 867 transitions, 19536 flow. Second operand has 15 states, 15 states have (on average 127.33333333333333) internal successors, (1910), 15 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:52,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:52,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 298 [2022-11-25 18:02:52,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:56,382 INFO L130 PetriNetUnfolder]: 4103/7749 cut-off events. [2022-11-25 18:02:56,382 INFO L131 PetriNetUnfolder]: For 233201/233213 co-relation queries the response was YES. [2022-11-25 18:02:56,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84232 conditions, 7749 events. 4103/7749 cut-off events. For 233201/233213 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 61267 event pairs, 330 based on Foata normal form. 184/7923 useless extension candidates. Maximal degree in co-relation 84115. Up to 3812 conditions per place. [2022-11-25 18:02:56,466 INFO L137 encePairwiseOnDemand]: 292/298 looper letters, 451 selfloop transitions, 753 changer transitions 33/1248 dead transitions. [2022-11-25 18:02:56,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1248 transitions, 31862 flow [2022-11-25 18:02:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:02:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:02:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 804 transitions. [2022-11-25 18:02:56,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44966442953020136 [2022-11-25 18:02:56,468 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 804 transitions. [2022-11-25 18:02:56,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 804 transitions. [2022-11-25 18:02:56,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:56,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 804 transitions. [2022-11-25 18:02:56,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.0) internal successors, (804), 6 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:56,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:56,470 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:56,470 INFO L175 Difference]: Start difference. First operand has 444 places, 867 transitions, 19536 flow. Second operand 6 states and 804 transitions. [2022-11-25 18:02:56,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1248 transitions, 31862 flow [2022-11-25 18:02:58,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 1248 transitions, 31161 flow, removed 19 selfloop flow, removed 23 redundant places. [2022-11-25 18:02:58,783 INFO L231 Difference]: Finished difference. Result has 423 places, 1194 transitions, 31317 flow [2022-11-25 18:02:58,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=18647, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=31317, PETRI_PLACES=423, PETRI_TRANSITIONS=1194} [2022-11-25 18:02:58,784 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 392 predicate places. [2022-11-25 18:02:58,784 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 1194 transitions, 31317 flow [2022-11-25 18:02:58,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 127.33333333333333) internal successors, (1910), 15 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:58,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:58,785 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:58,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:58,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-25 18:02:58,991 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:02:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:58,991 INFO L85 PathProgramCache]: Analyzing trace with hash -879440828, now seen corresponding path program 13 times [2022-11-25 18:02:58,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:58,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486838910] [2022-11-25 18:02:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:03:01,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:01,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486838910] [2022-11-25 18:03:01,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486838910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:03:01,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676852718] [2022-11-25 18:03:01,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:03:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:03:01,180 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:03:01,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 18:03:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:01,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 18:03:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:01,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:03:02,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:03:02,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 140 [2022-11-25 18:03:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:03:02,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676852718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:02,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:03:02,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 30 [2022-11-25 18:03:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700831189] [2022-11-25 18:03:02,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:02,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 18:03:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 18:03:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-11-25 18:03:07,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 298 [2022-11-25 18:03:07,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 1194 transitions, 31317 flow. Second operand has 32 states, 32 states have (on average 108.40625) internal successors, (3469), 32 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:07,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:07,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 298 [2022-11-25 18:03:07,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:18,724 INFO L130 PetriNetUnfolder]: 4723/8767 cut-off events. [2022-11-25 18:03:18,724 INFO L131 PetriNetUnfolder]: For 287420/287420 co-relation queries the response was YES. [2022-11-25 18:03:18,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104322 conditions, 8767 events. 4723/8767 cut-off events. For 287420/287420 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 69938 event pairs, 362 based on Foata normal form. 346/9107 useless extension candidates. Maximal degree in co-relation 104203. Up to 2897 conditions per place. [2022-11-25 18:03:18,837 INFO L137 encePairwiseOnDemand]: 288/298 looper letters, 623 selfloop transitions, 969 changer transitions 44/1637 dead transitions. [2022-11-25 18:03:18,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1637 transitions, 45270 flow [2022-11-25 18:03:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-25 18:03:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-25 18:03:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 6359 transitions. [2022-11-25 18:03:18,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3743671258683622 [2022-11-25 18:03:18,844 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 6359 transitions. [2022-11-25 18:03:18,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 6359 transitions. [2022-11-25 18:03:18,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:18,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 6359 transitions. [2022-11-25 18:03:18,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 111.56140350877193) internal successors, (6359), 57 states have internal predecessors, (6359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:18,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 298.0) internal successors, (17284), 58 states have internal predecessors, (17284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:18,860 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 298.0) internal successors, (17284), 58 states have internal predecessors, (17284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:18,860 INFO L175 Difference]: Start difference. First operand has 423 places, 1194 transitions, 31317 flow. Second operand 57 states and 6359 transitions. [2022-11-25 18:03:18,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1637 transitions, 45270 flow [2022-11-25 18:03:22,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1637 transitions, 41665 flow, removed 1671 selfloop flow, removed 18 redundant places. [2022-11-25 18:03:23,018 INFO L231 Difference]: Finished difference. Result has 457 places, 1448 transitions, 38395 flow [2022-11-25 18:03:23,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=28355, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=700, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=38395, PETRI_PLACES=457, PETRI_TRANSITIONS=1448} [2022-11-25 18:03:23,020 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 426 predicate places. [2022-11-25 18:03:23,020 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1448 transitions, 38395 flow [2022-11-25 18:03:23,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 108.40625) internal successors, (3469), 32 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:23,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:23,021 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:23,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-25 18:03:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:23,228 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:03:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1921732934, now seen corresponding path program 6 times [2022-11-25 18:03:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:23,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210818003] [2022-11-25 18:03:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:03:24,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:24,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210818003] [2022-11-25 18:03:24,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210818003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:03:24,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817210627] [2022-11-25 18:03:24,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:03:24,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:24,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:03:24,883 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:03:24,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 18:03:25,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:03:25,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:03:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 18:03:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:03:25,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:03:25,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:03:25,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2022-11-25 18:03:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:03:25,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817210627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:25,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:03:25,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 4] total 19 [2022-11-25 18:03:25,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882071186] [2022-11-25 18:03:25,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:25,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:03:25,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:25,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:03:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:03:26,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 298 [2022-11-25 18:03:26,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1448 transitions, 38395 flow. Second operand has 21 states, 21 states have (on average 114.52380952380952) internal successors, (2405), 21 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:26,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:26,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 298 [2022-11-25 18:03:26,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:34,059 INFO L130 PetriNetUnfolder]: 4665/8619 cut-off events. [2022-11-25 18:03:34,060 INFO L131 PetriNetUnfolder]: For 292516/292527 co-relation queries the response was YES. [2022-11-25 18:03:34,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100756 conditions, 8619 events. 4665/8619 cut-off events. For 292516/292527 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 68019 event pairs, 657 based on Foata normal form. 25/8635 useless extension candidates. Maximal degree in co-relation 100626. Up to 8013 conditions per place. [2022-11-25 18:03:34,218 INFO L137 encePairwiseOnDemand]: 290/298 looper letters, 1342 selfloop transitions, 151 changer transitions 10/1514 dead transitions. [2022-11-25 18:03:34,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1514 transitions, 42528 flow [2022-11-25 18:03:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:03:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:03:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2341 transitions. [2022-11-25 18:03:34,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3927852348993289 [2022-11-25 18:03:34,223 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2341 transitions. [2022-11-25 18:03:34,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2341 transitions. [2022-11-25 18:03:34,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:34,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2341 transitions. [2022-11-25 18:03:34,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 117.05) internal successors, (2341), 20 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:34,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 298.0) internal successors, (6258), 21 states have internal predecessors, (6258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:34,232 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 298.0) internal successors, (6258), 21 states have internal predecessors, (6258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:34,232 INFO L175 Difference]: Start difference. First operand has 457 places, 1448 transitions, 38395 flow. Second operand 20 states and 2341 transitions. [2022-11-25 18:03:34,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1514 transitions, 42528 flow [2022-11-25 18:03:39,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1514 transitions, 40572 flow, removed 732 selfloop flow, removed 18 redundant places. [2022-11-25 18:03:39,103 INFO L231 Difference]: Finished difference. Result has 458 places, 1468 transitions, 37304 flow [2022-11-25 18:03:39,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=36419, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=37304, PETRI_PLACES=458, PETRI_TRANSITIONS=1468} [2022-11-25 18:03:39,104 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 427 predicate places. [2022-11-25 18:03:39,105 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1468 transitions, 37304 flow [2022-11-25 18:03:39,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 114.52380952380952) internal successors, (2405), 21 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:39,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:39,105 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:39,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 18:03:39,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:39,306 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:03:39,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1992331898, now seen corresponding path program 14 times [2022-11-25 18:03:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:39,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890426936] [2022-11-25 18:03:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:39,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:03:41,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:41,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890426936] [2022-11-25 18:03:41,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890426936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:03:41,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689438951] [2022-11-25 18:03:41,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:03:41,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:41,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:03:41,380 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:03:41,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 18:03:41,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:03:41,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:03:41,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 18:03:41,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:03:41,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 18:03:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:42,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:03:43,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:03:43,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 150 treesize of output 218 [2022-11-25 18:03:43,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:03:43,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 128 [2022-11-25 18:03:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:03:45,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689438951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:45,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:03:45,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2022-11-25 18:03:45,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212426725] [2022-11-25 18:03:45,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:45,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 18:03:45,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 18:03:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=935, Unknown=1, NotChecked=0, Total=1056 [2022-11-25 18:03:50,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 298 [2022-11-25 18:03:50,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1468 transitions, 37304 flow. Second operand has 33 states, 33 states have (on average 93.27272727272727) internal successors, (3078), 33 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:50,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:50,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 298 [2022-11-25 18:03:50,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:54,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:03,410 INFO L130 PetriNetUnfolder]: 5246/9586 cut-off events. [2022-11-25 18:04:03,410 INFO L131 PetriNetUnfolder]: For 334222/334234 co-relation queries the response was YES. [2022-11-25 18:04:03,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109409 conditions, 9586 events. 5246/9586 cut-off events. For 334222/334234 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 75075 event pairs, 386 based on Foata normal form. 190/9768 useless extension candidates. Maximal degree in co-relation 109279. Up to 5838 conditions per place. [2022-11-25 18:04:03,582 INFO L137 encePairwiseOnDemand]: 290/298 looper letters, 812 selfloop transitions, 1012 changer transitions 11/1846 dead transitions. [2022-11-25 18:04:03,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 1846 transitions, 50219 flow [2022-11-25 18:04:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 18:04:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-25 18:04:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3942 transitions. [2022-11-25 18:04:03,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3226387297430021 [2022-11-25 18:04:03,590 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3942 transitions. [2022-11-25 18:04:03,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3942 transitions. [2022-11-25 18:04:03,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:03,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3942 transitions. [2022-11-25 18:04:03,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 96.14634146341463) internal successors, (3942), 41 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:03,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 298.0) internal successors, (12516), 42 states have internal predecessors, (12516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:03,607 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 298.0) internal successors, (12516), 42 states have internal predecessors, (12516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:03,607 INFO L175 Difference]: Start difference. First operand has 458 places, 1468 transitions, 37304 flow. Second operand 41 states and 3942 transitions. [2022-11-25 18:04:03,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 1846 transitions, 50219 flow [2022-11-25 18:04:08,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1846 transitions, 50111 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-11-25 18:04:08,747 INFO L231 Difference]: Finished difference. Result has 502 places, 1714 transitions, 47816 flow [2022-11-25 18:04:08,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=37185, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=818, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=47816, PETRI_PLACES=502, PETRI_TRANSITIONS=1714} [2022-11-25 18:04:08,748 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 471 predicate places. [2022-11-25 18:04:08,748 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1714 transitions, 47816 flow [2022-11-25 18:04:08,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 93.27272727272727) internal successors, (3078), 33 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:08,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:08,749 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:04:08,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:08,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-25 18:04:08,950 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:04:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:08,950 INFO L85 PathProgramCache]: Analyzing trace with hash 975958101, now seen corresponding path program 15 times [2022-11-25 18:04:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:08,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691703495] [2022-11-25 18:04:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:11,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691703495] [2022-11-25 18:04:11,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691703495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:04:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945152883] [2022-11-25 18:04:11,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:04:11,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:11,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:11,864 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:11,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 18:04:12,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:04:12,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:04:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 18:04:12,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:04:12,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 18:04:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:04:12,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:13,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:04:13,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 197 [2022-11-25 18:04:13,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:04:13,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 70 [2022-11-25 18:04:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:04:14,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945152883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:14,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:04:14,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2022-11-25 18:04:14,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143410755] [2022-11-25 18:04:14,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:14,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 18:04:14,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 18:04:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=831, Unknown=3, NotChecked=0, Total=930 [2022-11-25 18:04:17,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 298 [2022-11-25 18:04:17,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1714 transitions, 47816 flow. Second operand has 31 states, 31 states have (on average 90.29032258064517) internal successors, (2799), 31 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:17,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:17,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 298 [2022-11-25 18:04:17,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:27,516 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:29,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:31,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:33,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:45,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:47,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:49,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:54,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:56,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:02,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:04,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:10,456 INFO L130 PetriNetUnfolder]: 5791/10485 cut-off events. [2022-11-25 18:05:10,456 INFO L131 PetriNetUnfolder]: For 415044/415055 co-relation queries the response was YES. [2022-11-25 18:05:10,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127715 conditions, 10485 events. 5791/10485 cut-off events. For 415044/415055 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 82818 event pairs, 245 based on Foata normal form. 99/10581 useless extension candidates. Maximal degree in co-relation 127570. Up to 6194 conditions per place. [2022-11-25 18:05:10,617 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 1208 selfloop transitions, 919 changer transitions 15/2153 dead transitions. [2022-11-25 18:05:10,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 2153 transitions, 63850 flow [2022-11-25 18:05:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 18:05:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-25 18:05:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4033 transitions. [2022-11-25 18:05:10,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31473388481348524 [2022-11-25 18:05:10,622 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4033 transitions. [2022-11-25 18:05:10,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4033 transitions. [2022-11-25 18:05:10,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:10,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4033 transitions. [2022-11-25 18:05:10,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 93.79069767441861) internal successors, (4033), 43 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:10,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 298.0) internal successors, (13112), 44 states have internal predecessors, (13112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:10,639 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 298.0) internal successors, (13112), 44 states have internal predecessors, (13112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:10,639 INFO L175 Difference]: Start difference. First operand has 502 places, 1714 transitions, 47816 flow. Second operand 43 states and 4033 transitions. [2022-11-25 18:05:10,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 2153 transitions, 63850 flow [2022-11-25 18:05:16,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 2153 transitions, 62309 flow, removed 629 selfloop flow, removed 19 redundant places. [2022-11-25 18:05:16,972 INFO L231 Difference]: Finished difference. Result has 529 places, 1943 transitions, 55736 flow [2022-11-25 18:05:16,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=46031, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=55736, PETRI_PLACES=529, PETRI_TRANSITIONS=1943} [2022-11-25 18:05:16,973 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 498 predicate places. [2022-11-25 18:05:16,973 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1943 transitions, 55736 flow [2022-11-25 18:05:16,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 90.29032258064517) internal successors, (2799), 31 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:16,973 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:16,974 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:16,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:17,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-25 18:05:17,174 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:05:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:17,174 INFO L85 PathProgramCache]: Analyzing trace with hash -732010228, now seen corresponding path program 4 times [2022-11-25 18:05:17,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:05:17,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138010600] [2022-11-25 18:05:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:17,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:05:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:05:18,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:05:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138010600] [2022-11-25 18:05:18,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138010600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:05:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019910816] [2022-11-25 18:05:18,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:05:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:05:18,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:05:18,490 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:05:18,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 18:05:18,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:05:18,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:18,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:05:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:19,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 18:05:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:05:19,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:19,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:05:19,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-25 18:05:19,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-11-25 18:05:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:05:19,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019910816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:19,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:05:19,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2022-11-25 18:05:19,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186942311] [2022-11-25 18:05:19,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:19,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 18:05:19,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:05:19,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 18:05:19,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=957, Unknown=4, NotChecked=0, Total=1056 [2022-11-25 18:05:22,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 298 [2022-11-25 18:05:22,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 1943 transitions, 55736 flow. Second operand has 33 states, 33 states have (on average 111.27272727272727) internal successors, (3672), 33 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:22,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:22,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 298 [2022-11-25 18:05:22,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:33,697 INFO L130 PetriNetUnfolder]: 6248/11329 cut-off events. [2022-11-25 18:05:33,697 INFO L131 PetriNetUnfolder]: For 477410/477422 co-relation queries the response was YES. [2022-11-25 18:05:33,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141606 conditions, 11329 events. 6248/11329 cut-off events. For 477410/477422 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 90939 event pairs, 232 based on Foata normal form. 44/11369 useless extension candidates. Maximal degree in co-relation 141455. Up to 5044 conditions per place. [2022-11-25 18:05:34,017 INFO L137 encePairwiseOnDemand]: 289/298 looper letters, 1093 selfloop transitions, 1178 changer transitions 24/2306 dead transitions. [2022-11-25 18:05:34,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 2306 transitions, 69333 flow [2022-11-25 18:05:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 18:05:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 18:05:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3912 transitions. [2022-11-25 18:05:34,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3861034346624556 [2022-11-25 18:05:34,023 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3912 transitions. [2022-11-25 18:05:34,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3912 transitions. [2022-11-25 18:05:34,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:34,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3912 transitions. [2022-11-25 18:05:34,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 115.05882352941177) internal successors, (3912), 34 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:34,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 298.0) internal successors, (10430), 35 states have internal predecessors, (10430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:34,034 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 298.0) internal successors, (10430), 35 states have internal predecessors, (10430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:34,034 INFO L175 Difference]: Start difference. First operand has 529 places, 1943 transitions, 55736 flow. Second operand 34 states and 3912 transitions. [2022-11-25 18:05:34,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 2306 transitions, 69333 flow [2022-11-25 18:05:42,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 2306 transitions, 67528 flow, removed 793 selfloop flow, removed 14 redundant places. [2022-11-25 18:05:42,524 INFO L231 Difference]: Finished difference. Result has 553 places, 2137 transitions, 63122 flow [2022-11-25 18:05:42,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=53803, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=968, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=63122, PETRI_PLACES=553, PETRI_TRANSITIONS=2137} [2022-11-25 18:05:42,526 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 522 predicate places. [2022-11-25 18:05:42,526 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 2137 transitions, 63122 flow [2022-11-25 18:05:42,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 111.27272727272727) internal successors, (3672), 33 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:42,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:42,526 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:42,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:42,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:05:42,727 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 18:05:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash 433377310, now seen corresponding path program 7 times [2022-11-25 18:05:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:05:42,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825962452] [2022-11-25 18:05:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:05:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:05:44,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:05:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825962452] [2022-11-25 18:05:44,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825962452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:05:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196460871] [2022-11-25 18:05:44,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:05:44,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:05:44,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:05:44,482 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:05:44,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1e91e2-8b27-4d05-a37e-0d874ce84fac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 18:05:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:44,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-25 18:05:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:44,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 18:05:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:45,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:05:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:45,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:05:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:05:46,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:47,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:05:47,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 137 [2022-11-25 18:05:47,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:05:47,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 865 treesize of output 991 [2022-11-25 18:05:47,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:05:47,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 579 treesize of output 647 [2022-11-25 18:05:48,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:05:48,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 636 treesize of output 610