./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4e7fbc69 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_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:12:34,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:12:34,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:12:34,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:12:34,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:12:34,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:12:34,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:12:34,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:12:34,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:12:34,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:12:34,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:12:34,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:12:34,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:12:34,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:12:34,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:12:34,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:12:34,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:12:34,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:12:34,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:12:34,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:12:34,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:12:34,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:12:34,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:12:34,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:12:34,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:12:34,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:12:34,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:12:34,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:12:34,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:12:34,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:12:34,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:12:34,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:12:34,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:12:34,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:12:34,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:12:34,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:12:34,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:12:34,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:12:34,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:12:34,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:12:34,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:12:34,387 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-23 03:12:34,428 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:12:34,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:12:34,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:12:34,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:12:34,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:12:34,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:12:34,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:12:34,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:12:34,436 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:12:34,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:12:34,438 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:12:34,438 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:12:34,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:12:34,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:12:34,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:12:34,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:12:34,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:12:34,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:12:34,439 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-23 03:12:34,439 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:12:34,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:12:34,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:12:34,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:12:34,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:12:34,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:12:34,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:12:34,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:12:34,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:12:34,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:12:34,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:12:34,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:12:34,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:12:34,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:12:34,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:12:34,444 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:12:34,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:12:34,445 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_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-23 03:12:34,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:12:34,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:12:34,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:12:34,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:12:34,816 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:12:34,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-23 03:12:38,198 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:12:38,489 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:12:38,490 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-23 03:12:38,498 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/data/800e4ddf8/f4b27375474741019dbc8f4d51c3166a/FLAG430806468 [2022-11-23 03:12:38,516 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/data/800e4ddf8/f4b27375474741019dbc8f4d51c3166a [2022-11-23 03:12:38,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:12:38,521 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:12:38,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:12:38,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:12:38,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:12:38,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:38,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9006ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38, skipping insertion in model container [2022-11-23 03:12:38,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:38,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:12:38,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:12:38,798 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_38731059-ab15-4774-bb9f-1c44c3a6335c/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-23 03:12:38,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:12:38,827 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:12:38,854 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_38731059-ab15-4774-bb9f-1c44c3a6335c/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-23 03:12:38,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:12:38,873 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:12:38,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38 WrapperNode [2022-11-23 03:12:38,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:12:38,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:12:38,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:12:38,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:12:38,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:38,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:38,961 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 132 [2022-11-23 03:12:38,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:12:38,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:12:38,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:12:38,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:12:38,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:38,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:39,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:39,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:39,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:39,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:39,034 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:39,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:39,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:12:39,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:12:39,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:12:39,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:12:39,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (1/1) ... [2022-11-23 03:12:39,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:12:39,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:12:39,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:12:39,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:12:39,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:12:39,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:12:39,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:12:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:12:39,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:12:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:12:39,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:12:39,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:12:39,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:12:39,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:12:39,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:12:39,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:12:39,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:12:39,161 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:12:39,330 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:12:39,332 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:12:39,872 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:12:39,884 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:12:39,885 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:12:39,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:12:39 BoogieIcfgContainer [2022-11-23 03:12:39,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:12:39,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:12:39,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:12:39,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:12:39,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:12:38" (1/3) ... [2022-11-23 03:12:39,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f21ad31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:12:39, skipping insertion in model container [2022-11-23 03:12:39,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:38" (2/3) ... [2022-11-23 03:12:39,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f21ad31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:12:39, skipping insertion in model container [2022-11-23 03:12:39,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:12:39" (3/3) ... [2022-11-23 03:12:39,899 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-23 03:12:39,910 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:12:39,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:12:39,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-23 03:12:39,936 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:12:40,131 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:12:40,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 249 transitions, 514 flow [2022-11-23 03:12:40,334 INFO L130 PetriNetUnfolder]: 21/247 cut-off events. [2022-11-23 03:12:40,335 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:12:40,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 247 events. 21/247 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 328 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 169. Up to 3 conditions per place. [2022-11-23 03:12:40,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 249 transitions, 514 flow [2022-11-23 03:12:40,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 212 transitions, 433 flow [2022-11-23 03:12:40,372 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:12:40,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 212 transitions, 433 flow [2022-11-23 03:12:40,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 212 transitions, 433 flow [2022-11-23 03:12:40,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 212 transitions, 433 flow [2022-11-23 03:12:40,464 INFO L130 PetriNetUnfolder]: 18/212 cut-off events. [2022-11-23 03:12:40,464 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 03:12:40,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 212 events. 18/212 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 314 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 169. Up to 3 conditions per place. [2022-11-23 03:12:40,470 INFO L119 LiptonReduction]: Number of co-enabled transitions 4028 [2022-11-23 03:12:50,012 INFO L134 LiptonReduction]: Checked pairs total: 4791 [2022-11-23 03:12:50,012 INFO L136 LiptonReduction]: Total number of compositions: 231 [2022-11-23 03:12:50,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:12:50,048 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;@55bd2805, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:12:50,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-23 03:12:50,058 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-23 03:12:50,058 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:12:50,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:12:50,059 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:12:50,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:12:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash 29589, now seen corresponding path program 1 times [2022-11-23 03:12:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:12:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178231004] [2022-11-23 03:12:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:50,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:12:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:12:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178231004] [2022-11-23 03:12:50,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178231004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:12:50,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:12:50,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:12:50,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673870526] [2022-11-23 03:12:50,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:12:50,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:12:50,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:12:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:12:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:12:50,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 480 [2022-11-23 03:12:50,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:50,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:12:50,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 480 [2022-11-23 03:12:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:12:50,892 INFO L130 PetriNetUnfolder]: 651/1041 cut-off events. [2022-11-23 03:12:50,892 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-23 03:12:50,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 1041 events. 651/1041 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4580 event pairs, 456 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 988. Up to 524 conditions per place. [2022-11-23 03:12:50,902 INFO L137 encePairwiseOnDemand]: 472/480 looper letters, 63 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2022-11-23 03:12:50,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 67 transitions, 286 flow [2022-11-23 03:12:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:12:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:12:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2022-11-23 03:12:50,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2022-11-23 03:12:50,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2022-11-23 03:12:50,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2022-11-23 03:12:50,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:12:50,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2022-11-23 03:12:50,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:50,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:50,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:50,947 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 81 flow. Second operand 3 states and 752 transitions. [2022-11-23 03:12:50,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 67 transitions, 286 flow [2022-11-23 03:12:50,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 67 transitions, 276 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:12:50,954 INFO L231 Difference]: Finished difference. Result has 37 places, 39 transitions, 112 flow [2022-11-23 03:12:50,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=39} [2022-11-23 03:12:50,960 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2022-11-23 03:12:50,961 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 39 transitions, 112 flow [2022-11-23 03:12:50,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:50,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:12:50,962 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:12:50,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:12:50,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:12:50,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:50,963 INFO L85 PathProgramCache]: Analyzing trace with hash 918545, now seen corresponding path program 1 times [2022-11-23 03:12:50,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:12:50,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503895020] [2022-11-23 03:12:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:50,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:12:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:51,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:12:51,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503895020] [2022-11-23 03:12:51,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503895020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:51,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511182226] [2022-11-23 03:12:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:51,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:51,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:12:51,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:12:51,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:12:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:12:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:51,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:51,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511182226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:12:51,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:12:51,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-23 03:12:51,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887309083] [2022-11-23 03:12:51,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:12:51,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:12:51,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:12:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:12:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:12:51,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 480 [2022-11-23 03:12:51,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 39 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 228.14285714285714) internal successors, (1597), 7 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:51,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:12:51,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 480 [2022-11-23 03:12:51,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:12:52,127 INFO L130 PetriNetUnfolder]: 1632/2601 cut-off events. [2022-11-23 03:12:52,128 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-23 03:12:52,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 2601 events. 1632/2601 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 13655 event pairs, 1140 based on Foata normal form. 0/1311 useless extension candidates. Maximal degree in co-relation 4239. Up to 522 conditions per place. [2022-11-23 03:12:52,149 INFO L137 encePairwiseOnDemand]: 472/480 looper letters, 145 selfloop transitions, 21 changer transitions 0/166 dead transitions. [2022-11-23 03:12:52,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 166 transitions, 750 flow [2022-11-23 03:12:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:12:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:12:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1761 transitions. [2022-11-23 03:12:52,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5241071428571429 [2022-11-23 03:12:52,157 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1761 transitions. [2022-11-23 03:12:52,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1761 transitions. [2022-11-23 03:12:52,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:12:52,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1761 transitions. [2022-11-23 03:12:52,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 251.57142857142858) internal successors, (1761), 7 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:52,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 480.0) internal successors, (3840), 8 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:52,177 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 480.0) internal successors, (3840), 8 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:52,178 INFO L175 Difference]: Start difference. First operand has 37 places, 39 transitions, 112 flow. Second operand 7 states and 1761 transitions. [2022-11-23 03:12:52,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 166 transitions, 750 flow [2022-11-23 03:12:52,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 166 transitions, 736 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:12:52,184 INFO L231 Difference]: Finished difference. Result has 44 places, 54 transitions, 243 flow [2022-11-23 03:12:52,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=44, PETRI_TRANSITIONS=54} [2022-11-23 03:12:52,186 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2022-11-23 03:12:52,186 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 54 transitions, 243 flow [2022-11-23 03:12:52,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 228.14285714285714) internal successors, (1597), 7 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:52,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:12:52,188 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-23 03:12:52,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:12:52,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:52,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:12:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash 28476180, now seen corresponding path program 1 times [2022-11-23 03:12:52,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:12:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124680956] [2022-11-23 03:12:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:52,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:12:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:52,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:12:52,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124680956] [2022-11-23 03:12:52,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124680956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:52,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995545486] [2022-11-23 03:12:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:52,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:52,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:12:52,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:12:52,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:12:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:12:52,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:52,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:12:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995545486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:12:52,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:12:52,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-23 03:12:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536687049] [2022-11-23 03:12:52,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:12:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:12:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:12:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:12:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:12:52,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 480 [2022-11-23 03:12:52,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 54 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 227.8) internal successors, (1139), 5 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:52,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:12:52,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 480 [2022-11-23 03:12:52,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:12:53,260 INFO L130 PetriNetUnfolder]: 1626/2593 cut-off events. [2022-11-23 03:12:53,260 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-23 03:12:53,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5356 conditions, 2593 events. 1626/2593 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 13647 event pairs, 1140 based on Foata normal form. 2/1313 useless extension candidates. Maximal degree in co-relation 3194. Up to 1555 conditions per place. [2022-11-23 03:12:53,279 INFO L137 encePairwiseOnDemand]: 474/480 looper letters, 93 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2022-11-23 03:12:53,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 102 transitions, 513 flow [2022-11-23 03:12:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:12:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:12:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1235 transitions. [2022-11-23 03:12:53,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2022-11-23 03:12:53,284 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1235 transitions. [2022-11-23 03:12:53,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1235 transitions. [2022-11-23 03:12:53,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:12:53,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1235 transitions. [2022-11-23 03:12:53,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:53,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:53,298 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:53,298 INFO L175 Difference]: Start difference. First operand has 44 places, 54 transitions, 243 flow. Second operand 5 states and 1235 transitions. [2022-11-23 03:12:53,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 102 transitions, 513 flow [2022-11-23 03:12:53,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 102 transitions, 494 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 03:12:53,303 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 188 flow [2022-11-23 03:12:53,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2022-11-23 03:12:53,304 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2022-11-23 03:12:53,304 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 188 flow [2022-11-23 03:12:53,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.8) internal successors, (1139), 5 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:53,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:12:53,306 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 03:12:53,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:12:53,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:53,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:12:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1595847317, now seen corresponding path program 2 times [2022-11-23 03:12:53,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:12:53,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324471976] [2022-11-23 03:12:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:53,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:12:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:53,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:12:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324471976] [2022-11-23 03:12:53,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324471976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778426294] [2022-11-23 03:12:53,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:12:53,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:53,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:12:53,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:12:53,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:12:53,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:12:53,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:12:53,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:12:53,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:12:53,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:12:53,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778426294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:12:53,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:12:53,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-23 03:12:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347558862] [2022-11-23 03:12:53,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:12:53,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:12:53,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:12:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:12:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:12:53,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 480 [2022-11-23 03:12:53,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:53,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:12:53,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 480 [2022-11-23 03:12:53,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:12:54,223 INFO L130 PetriNetUnfolder]: 1626/2592 cut-off events. [2022-11-23 03:12:54,224 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-23 03:12:54,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5349 conditions, 2592 events. 1626/2592 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 13629 event pairs, 1140 based on Foata normal form. 1/1313 useless extension candidates. Maximal degree in co-relation 4225. Up to 2587 conditions per place. [2022-11-23 03:12:54,244 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 39 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2022-11-23 03:12:54,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 268 flow [2022-11-23 03:12:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:12:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:12:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2022-11-23 03:12:54,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5006944444444444 [2022-11-23 03:12:54,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2022-11-23 03:12:54,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2022-11-23 03:12:54,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:12:54,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2022-11-23 03:12:54,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:54,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:54,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:54,257 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 188 flow. Second operand 3 states and 721 transitions. [2022-11-23 03:12:54,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 268 flow [2022-11-23 03:12:54,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 255 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:12:54,264 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 177 flow [2022-11-23 03:12:54,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2022-11-23 03:12:54,266 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2022-11-23 03:12:54,267 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 177 flow [2022-11-23 03:12:54,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:54,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:12:54,268 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-23 03:12:54,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:12:54,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:54,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:12:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:54,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1247637122, now seen corresponding path program 1 times [2022-11-23 03:12:54,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:12:54,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14743888] [2022-11-23 03:12:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:54,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:12:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:12:54,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14743888] [2022-11-23 03:12:54,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14743888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72370555] [2022-11-23 03:12:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:54,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:12:54,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:12:54,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:12:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:54,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:12:54,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:54,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:54,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72370555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:12:54,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:12:54,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 03:12:54,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264003293] [2022-11-23 03:12:54,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:12:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:12:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:12:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:12:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:12:55,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 480 [2022-11-23 03:12:55,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 177 flow. Second operand has 13 states, 13 states have (on average 228.15384615384616) internal successors, (2966), 13 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:55,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:12:55,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 480 [2022-11-23 03:12:55,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:12:56,495 INFO L130 PetriNetUnfolder]: 3576/5700 cut-off events. [2022-11-23 03:12:56,495 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2022-11-23 03:12:56,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11738 conditions, 5700 events. 3576/5700 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32390 event pairs, 2508 based on Foata normal form. 6/2890 useless extension candidates. Maximal degree in co-relation 11634. Up to 847 conditions per place. [2022-11-23 03:12:56,545 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 312 selfloop transitions, 31 changer transitions 0/343 dead transitions. [2022-11-23 03:12:56,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 343 transitions, 1583 flow [2022-11-23 03:12:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:12:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 03:12:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3073 transitions. [2022-11-23 03:12:56,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5335069444444445 [2022-11-23 03:12:56,556 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3073 transitions. [2022-11-23 03:12:56,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3073 transitions. [2022-11-23 03:12:56,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:12:56,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3073 transitions. [2022-11-23 03:12:56,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 256.0833333333333) internal successors, (3073), 12 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:56,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 480.0) internal successors, (6240), 13 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:56,585 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 480.0) internal successors, (6240), 13 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:56,585 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 177 flow. Second operand 12 states and 3073 transitions. [2022-11-23 03:12:56,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 343 transitions, 1583 flow [2022-11-23 03:12:56,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 343 transitions, 1559 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:12:56,594 INFO L231 Difference]: Finished difference. Result has 57 places, 63 transitions, 381 flow [2022-11-23 03:12:56,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=381, PETRI_PLACES=57, PETRI_TRANSITIONS=63} [2022-11-23 03:12:56,599 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2022-11-23 03:12:56,599 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 63 transitions, 381 flow [2022-11-23 03:12:56,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 228.15384615384616) internal successors, (2966), 13 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:56,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:12:56,604 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:12:56,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:12:56,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:56,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:12:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1267352544, now seen corresponding path program 1 times [2022-11-23 03:12:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:12:56,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594655528] [2022-11-23 03:12:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:12:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:56,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:12:56,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594655528] [2022-11-23 03:12:56,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594655528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:12:56,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:12:56,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:12:56,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997493203] [2022-11-23 03:12:56,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:12:56,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:12:56,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:12:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:12:56,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:12:56,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 480 [2022-11-23 03:12:56,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 63 transitions, 381 flow. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:56,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:12:56,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 480 [2022-11-23 03:12:56,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:12:58,514 INFO L130 PetriNetUnfolder]: 6128/9814 cut-off events. [2022-11-23 03:12:58,515 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-11-23 03:12:58,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20193 conditions, 9814 events. 6128/9814 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 63576 event pairs, 2508 based on Foata normal form. 0/5106 useless extension candidates. Maximal degree in co-relation 16490. Up to 5701 conditions per place. [2022-11-23 03:12:58,590 INFO L137 encePairwiseOnDemand]: 476/480 looper letters, 83 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-11-23 03:12:58,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 85 transitions, 598 flow [2022-11-23 03:12:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:12:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:12:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2022-11-23 03:12:58,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2022-11-23 03:12:58,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2022-11-23 03:12:58,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2022-11-23 03:12:58,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:12:58,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2022-11-23 03:12:58,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:58,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:58,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:58,604 INFO L175 Difference]: Start difference. First operand has 57 places, 63 transitions, 381 flow. Second operand 3 states and 750 transitions. [2022-11-23 03:12:58,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 85 transitions, 598 flow [2022-11-23 03:12:58,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 85 transitions, 508 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-23 03:12:58,611 INFO L231 Difference]: Finished difference. Result has 55 places, 64 transitions, 305 flow [2022-11-23 03:12:58,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=55, PETRI_TRANSITIONS=64} [2022-11-23 03:12:58,615 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2022-11-23 03:12:58,615 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 305 flow [2022-11-23 03:12:58,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:58,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:12:58,616 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:12:58,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:12:58,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:12:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:58,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1267352065, now seen corresponding path program 1 times [2022-11-23 03:12:58,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:12:58,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32409997] [2022-11-23 03:12:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:58,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:12:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:58,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:12:58,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32409997] [2022-11-23 03:12:58,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32409997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:12:58,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:12:58,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:12:58,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029210774] [2022-11-23 03:12:58,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:12:58,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:12:58,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:12:58,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:12:58,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:12:58,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 480 [2022-11-23 03:12:58,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 64 transitions, 305 flow. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:12:58,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:12:58,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 480 [2022-11-23 03:12:58,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:01,682 INFO L130 PetriNetUnfolder]: 10525/16496 cut-off events. [2022-11-23 03:13:01,683 INFO L131 PetriNetUnfolder]: For 1698/1698 co-relation queries the response was YES. [2022-11-23 03:13:01,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35751 conditions, 16496 events. 10525/16496 cut-off events. For 1698/1698 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 107272 event pairs, 6886 based on Foata normal form. 0/9710 useless extension candidates. Maximal degree in co-relation 29249. Up to 7965 conditions per place. [2022-11-23 03:13:01,801 INFO L137 encePairwiseOnDemand]: 472/480 looper letters, 124 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2022-11-23 03:13:01,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 130 transitions, 793 flow [2022-11-23 03:13:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:13:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:13:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1189 transitions. [2022-11-23 03:13:01,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49541666666666667 [2022-11-23 03:13:01,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1189 transitions. [2022-11-23 03:13:01,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1189 transitions. [2022-11-23 03:13:01,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:01,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1189 transitions. [2022-11-23 03:13:01,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.8) internal successors, (1189), 5 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:01,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:01,818 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:01,818 INFO L175 Difference]: Start difference. First operand has 55 places, 64 transitions, 305 flow. Second operand 5 states and 1189 transitions. [2022-11-23 03:13:01,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 130 transitions, 793 flow [2022-11-23 03:13:01,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 130 transitions, 787 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:13:01,830 INFO L231 Difference]: Finished difference. Result has 61 places, 67 transitions, 348 flow [2022-11-23 03:13:01,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=61, PETRI_TRANSITIONS=67} [2022-11-23 03:13:01,831 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2022-11-23 03:13:01,832 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 67 transitions, 348 flow [2022-11-23 03:13:01,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:01,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:01,833 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:01,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 03:13:01,833 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:01,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1267352172, now seen corresponding path program 1 times [2022-11-23 03:13:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:01,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486509912] [2022-11-23 03:13:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:01,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486509912] [2022-11-23 03:13:02,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486509912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:02,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:02,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:02,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872285430] [2022-11-23 03:13:02,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:02,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:13:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:02,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:13:02,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:13:02,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 480 [2022-11-23 03:13:02,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 67 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 218.4) internal successors, (1092), 5 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:02,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:02,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 480 [2022-11-23 03:13:02,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:04,944 INFO L130 PetriNetUnfolder]: 10283/16042 cut-off events. [2022-11-23 03:13:04,944 INFO L131 PetriNetUnfolder]: For 4154/4154 co-relation queries the response was YES. [2022-11-23 03:13:04,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37786 conditions, 16042 events. 10283/16042 cut-off events. For 4154/4154 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 103221 event pairs, 5973 based on Foata normal form. 204/11694 useless extension candidates. Maximal degree in co-relation 30758. Up to 13166 conditions per place. [2022-11-23 03:13:05,044 INFO L137 encePairwiseOnDemand]: 472/480 looper letters, 102 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2022-11-23 03:13:05,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 119 transitions, 733 flow [2022-11-23 03:13:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:13:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:13:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1390 transitions. [2022-11-23 03:13:05,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2022-11-23 03:13:05,049 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1390 transitions. [2022-11-23 03:13:05,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1390 transitions. [2022-11-23 03:13:05,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:05,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1390 transitions. [2022-11-23 03:13:05,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.66666666666666) internal successors, (1390), 6 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:05,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:05,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:05,063 INFO L175 Difference]: Start difference. First operand has 61 places, 67 transitions, 348 flow. Second operand 6 states and 1390 transitions. [2022-11-23 03:13:05,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 119 transitions, 733 flow [2022-11-23 03:13:05,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 119 transitions, 729 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-23 03:13:05,082 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 443 flow [2022-11-23 03:13:05,083 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=443, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2022-11-23 03:13:05,085 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2022-11-23 03:13:05,086 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 443 flow [2022-11-23 03:13:05,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.4) internal successors, (1092), 5 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:05,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:05,088 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:05,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:13:05,089 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1106975491, now seen corresponding path program 1 times [2022-11-23 03:13:05,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:05,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132635437] [2022-11-23 03:13:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:05,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:05,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132635437] [2022-11-23 03:13:05,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132635437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:05,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534672831] [2022-11-23 03:13:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:05,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:05,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:13:05,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:13:05,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:13:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:05,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:13:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:13:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:05,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:13:05,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534672831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:05,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:13:05,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-11-23 03:13:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139522856] [2022-11-23 03:13:05,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:05,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:13:05,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:13:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:13:05,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 480 [2022-11-23 03:13:05,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 443 flow. Second operand has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:05,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:05,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 480 [2022-11-23 03:13:05,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:07,112 INFO L130 PetriNetUnfolder]: 7884/12173 cut-off events. [2022-11-23 03:13:07,112 INFO L131 PetriNetUnfolder]: For 10834/10834 co-relation queries the response was YES. [2022-11-23 03:13:07,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29856 conditions, 12173 events. 7884/12173 cut-off events. For 10834/10834 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 73334 event pairs, 4796 based on Foata normal form. 594/9443 useless extension candidates. Maximal degree in co-relation 26594. Up to 12161 conditions per place. [2022-11-23 03:13:07,197 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 53 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2022-11-23 03:13:07,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 65 transitions, 535 flow [2022-11-23 03:13:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:13:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:13:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 941 transitions. [2022-11-23 03:13:07,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4901041666666667 [2022-11-23 03:13:07,202 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 941 transitions. [2022-11-23 03:13:07,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 941 transitions. [2022-11-23 03:13:07,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:07,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 941 transitions. [2022-11-23 03:13:07,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.25) internal successors, (941), 4 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:07,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:07,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:07,214 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 443 flow. Second operand 4 states and 941 transitions. [2022-11-23 03:13:07,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 65 transitions, 535 flow [2022-11-23 03:13:07,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 481 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-11-23 03:13:07,226 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 375 flow [2022-11-23 03:13:07,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=375, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2022-11-23 03:13:07,227 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2022-11-23 03:13:07,228 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 375 flow [2022-11-23 03:13:07,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:07,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:07,229 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:07,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:07,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:07,436 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash 547951672, now seen corresponding path program 1 times [2022-11-23 03:13:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:07,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407323259] [2022-11-23 03:13:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:07,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:07,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407323259] [2022-11-23 03:13:07,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407323259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510974018] [2022-11-23 03:13:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:07,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:07,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:13:07,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:13:07,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:13:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:13:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:13:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:07,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:13:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:07,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510974018] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:07,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:13:07,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 2] total 9 [2022-11-23 03:13:07,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316580977] [2022-11-23 03:13:07,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:07,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:13:07,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:07,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:13:07,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:13:08,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 480 [2022-11-23 03:13:08,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:08,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:08,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 480 [2022-11-23 03:13:08,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:09,362 INFO L130 PetriNetUnfolder]: 7304/11353 cut-off events. [2022-11-23 03:13:09,362 INFO L131 PetriNetUnfolder]: For 3030/3030 co-relation queries the response was YES. [2022-11-23 03:13:09,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26458 conditions, 11353 events. 7304/11353 cut-off events. For 3030/3030 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 68254 event pairs, 4496 based on Foata normal form. 440/8589 useless extension candidates. Maximal degree in co-relation 21526. Up to 11353 conditions per place. [2022-11-23 03:13:09,446 INFO L137 encePairwiseOnDemand]: 478/480 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2022-11-23 03:13:09,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 488 flow [2022-11-23 03:13:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:13:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2022-11-23 03:13:09,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4625 [2022-11-23 03:13:09,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2022-11-23 03:13:09,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2022-11-23 03:13:09,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:09,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2022-11-23 03:13:09,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:09,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:09,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:09,458 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 375 flow. Second operand 3 states and 666 transitions. [2022-11-23 03:13:09,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 488 flow [2022-11-23 03:13:09,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 475 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:13:09,468 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 351 flow [2022-11-23 03:13:09,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2022-11-23 03:13:09,470 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2022-11-23 03:13:09,471 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 351 flow [2022-11-23 03:13:09,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:09,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:09,472 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:09,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:09,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 03:13:09,680 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash -631694737, now seen corresponding path program 1 times [2022-11-23 03:13:09,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:09,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832641550] [2022-11-23 03:13:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:09,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:09,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:09,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832641550] [2022-11-23 03:13:09,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832641550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:09,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:09,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:13:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499740317] [2022-11-23 03:13:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:09,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:09,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 480 [2022-11-23 03:13:09,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 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) [2022-11-23 03:13:09,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:09,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 480 [2022-11-23 03:13:09,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:11,966 INFO L130 PetriNetUnfolder]: 10614/16499 cut-off events. [2022-11-23 03:13:11,966 INFO L131 PetriNetUnfolder]: For 3114/3114 co-relation queries the response was YES. [2022-11-23 03:13:12,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38990 conditions, 16499 events. 10614/16499 cut-off events. For 3114/3114 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 106072 event pairs, 4496 based on Foata normal form. 0/12115 useless extension candidates. Maximal degree in co-relation 38966. Up to 11354 conditions per place. [2022-11-23 03:13:12,053 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 80 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2022-11-23 03:13:12,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 573 flow [2022-11-23 03:13:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:13:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2022-11-23 03:13:12,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2022-11-23 03:13:12,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2022-11-23 03:13:12,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2022-11-23 03:13:12,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:12,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2022-11-23 03:13:12,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:12,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:12,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:12,066 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 351 flow. Second operand 3 states and 740 transitions. [2022-11-23 03:13:12,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 573 flow [2022-11-23 03:13:12,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:13:12,097 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 362 flow [2022-11-23 03:13:12,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2022-11-23 03:13:12,098 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2022-11-23 03:13:12,098 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 362 flow [2022-11-23 03:13:12,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 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) [2022-11-23 03:13:12,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:12,099 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:12,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 03:13:12,099 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:12,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:12,100 INFO L85 PathProgramCache]: Analyzing trace with hash -191850407, now seen corresponding path program 1 times [2022-11-23 03:13:12,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:12,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119851999] [2022-11-23 03:13:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:12,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:12,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:12,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119851999] [2022-11-23 03:13:12,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119851999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:12,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962988452] [2022-11-23 03:13:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:12,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:12,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:13:12,288 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:13:12,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:13:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:13:12,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:13:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:12,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:13:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:12,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962988452] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:12,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:13:12,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 9 [2022-11-23 03:13:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281913745] [2022-11-23 03:13:12,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:12,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:13:12,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:13:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:13:12,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 480 [2022-11-23 03:13:12,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:12,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:12,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 480 [2022-11-23 03:13:12,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:15,059 INFO L130 PetriNetUnfolder]: 10484/16709 cut-off events. [2022-11-23 03:13:15,059 INFO L131 PetriNetUnfolder]: For 5730/5730 co-relation queries the response was YES. [2022-11-23 03:13:15,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42231 conditions, 16709 events. 10484/16709 cut-off events. For 5730/5730 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 112005 event pairs, 5436 based on Foata normal form. 340/14829 useless extension candidates. Maximal degree in co-relation 42206. Up to 7798 conditions per place. [2022-11-23 03:13:15,157 INFO L137 encePairwiseOnDemand]: 472/480 looper letters, 123 selfloop transitions, 9 changer transitions 0/132 dead transitions. [2022-11-23 03:13:15,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 132 transitions, 874 flow [2022-11-23 03:13:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:13:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:13:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1384 transitions. [2022-11-23 03:13:15,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2022-11-23 03:13:15,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1384 transitions. [2022-11-23 03:13:15,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1384 transitions. [2022-11-23 03:13:15,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:15,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1384 transitions. [2022-11-23 03:13:15,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.66666666666666) internal successors, (1384), 6 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:15,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:15,178 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:15,179 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 362 flow. Second operand 6 states and 1384 transitions. [2022-11-23 03:13:15,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 132 transitions, 874 flow [2022-11-23 03:13:15,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 132 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:13:15,250 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 421 flow [2022-11-23 03:13:15,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=421, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2022-11-23 03:13:15,251 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2022-11-23 03:13:15,252 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 421 flow [2022-11-23 03:13:15,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:15,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:15,253 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:15,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:15,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:15,459 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1844955671, now seen corresponding path program 1 times [2022-11-23 03:13:15,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101106077] [2022-11-23 03:13:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:15,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:15,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:15,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101106077] [2022-11-23 03:13:15,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101106077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:15,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:15,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:13:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118520461] [2022-11-23 03:13:15,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:15,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:15,529 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 480 [2022-11-23 03:13:15,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:15,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:15,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 480 [2022-11-23 03:13:15,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:18,009 INFO L130 PetriNetUnfolder]: 10484/17033 cut-off events. [2022-11-23 03:13:18,009 INFO L131 PetriNetUnfolder]: For 15064/15064 co-relation queries the response was YES. [2022-11-23 03:13:18,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46042 conditions, 17033 events. 10484/17033 cut-off events. For 15064/15064 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 124636 event pairs, 906 based on Foata normal form. 0/15929 useless extension candidates. Maximal degree in co-relation 46013. Up to 14734 conditions per place. [2022-11-23 03:13:18,101 INFO L137 encePairwiseOnDemand]: 478/480 looper letters, 83 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2022-11-23 03:13:18,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 663 flow [2022-11-23 03:13:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:13:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2022-11-23 03:13:18,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5090277777777777 [2022-11-23 03:13:18,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2022-11-23 03:13:18,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2022-11-23 03:13:18,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:18,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2022-11-23 03:13:18,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:18,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:18,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:18,111 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 421 flow. Second operand 3 states and 733 transitions. [2022-11-23 03:13:18,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 663 flow [2022-11-23 03:13:18,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 663 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:13:18,151 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 419 flow [2022-11-23 03:13:18,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2022-11-23 03:13:18,152 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 36 predicate places. [2022-11-23 03:13:18,153 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 419 flow [2022-11-23 03:13:18,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:18,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:18,154 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 03:13:18,154 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1844955670, now seen corresponding path program 1 times [2022-11-23 03:13:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:18,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886301924] [2022-11-23 03:13:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:18,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:18,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886301924] [2022-11-23 03:13:18,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886301924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:18,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:18,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:13:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85059010] [2022-11-23 03:13:18,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:13:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:13:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:13:18,409 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 480 [2022-11-23 03:13:18,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 419 flow. Second operand has 5 states, 5 states have (on average 221.8) internal successors, (1109), 5 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:18,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:18,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 480 [2022-11-23 03:13:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:20,257 INFO L130 PetriNetUnfolder]: 6688/11125 cut-off events. [2022-11-23 03:13:20,257 INFO L131 PetriNetUnfolder]: For 7994/7994 co-relation queries the response was YES. [2022-11-23 03:13:20,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31219 conditions, 11125 events. 6688/11125 cut-off events. For 7994/7994 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 75024 event pairs, 4130 based on Foata normal form. 0/10603 useless extension candidates. Maximal degree in co-relation 31189. Up to 8072 conditions per place. [2022-11-23 03:13:20,332 INFO L137 encePairwiseOnDemand]: 474/480 looper letters, 117 selfloop transitions, 6 changer transitions 8/131 dead transitions. [2022-11-23 03:13:20,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 131 transitions, 937 flow [2022-11-23 03:13:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:13:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:13:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1629 transitions. [2022-11-23 03:13:20,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48482142857142857 [2022-11-23 03:13:20,340 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1629 transitions. [2022-11-23 03:13:20,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1629 transitions. [2022-11-23 03:13:20,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:20,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1629 transitions. [2022-11-23 03:13:20,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 232.71428571428572) internal successors, (1629), 7 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:20,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 480.0) internal successors, (3840), 8 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:20,355 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 480.0) internal successors, (3840), 8 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:20,356 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 419 flow. Second operand 7 states and 1629 transitions. [2022-11-23 03:13:20,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 131 transitions, 937 flow [2022-11-23 03:13:20,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 131 transitions, 934 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:13:20,415 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 448 flow [2022-11-23 03:13:20,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2022-11-23 03:13:20,417 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 43 predicate places. [2022-11-23 03:13:20,417 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 448 flow [2022-11-23 03:13:20,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 221.8) internal successors, (1109), 5 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:20,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:20,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:20,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 03:13:20,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1892300540, now seen corresponding path program 1 times [2022-11-23 03:13:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:20,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558503370] [2022-11-23 03:13:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:20,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:20,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558503370] [2022-11-23 03:13:20,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558503370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:20,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:20,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:13:20,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914796780] [2022-11-23 03:13:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:20,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:20,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 480 [2022-11-23 03:13:20,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 448 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:20,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:20,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 480 [2022-11-23 03:13:20,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:22,150 INFO L130 PetriNetUnfolder]: 6138/10575 cut-off events. [2022-11-23 03:13:22,150 INFO L131 PetriNetUnfolder]: For 6464/6464 co-relation queries the response was YES. [2022-11-23 03:13:22,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29693 conditions, 10575 events. 6138/10575 cut-off events. For 6464/6464 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 75433 event pairs, 1320 based on Foata normal form. 550/10951 useless extension candidates. Maximal degree in co-relation 29660. Up to 7448 conditions per place. [2022-11-23 03:13:22,227 INFO L137 encePairwiseOnDemand]: 478/480 looper letters, 79 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2022-11-23 03:13:22,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 662 flow [2022-11-23 03:13:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:13:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-11-23 03:13:22,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5097222222222222 [2022-11-23 03:13:22,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-11-23 03:13:22,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-11-23 03:13:22,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:22,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-11-23 03:13:22,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:22,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:22,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:22,239 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 448 flow. Second operand 3 states and 734 transitions. [2022-11-23 03:13:22,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 662 flow [2022-11-23 03:13:22,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 652 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:13:22,298 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 412 flow [2022-11-23 03:13:22,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2022-11-23 03:13:22,299 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2022-11-23 03:13:22,299 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 412 flow [2022-11-23 03:13:22,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:22,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:22,300 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:22,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 03:13:22,300 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:22,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1292997547, now seen corresponding path program 1 times [2022-11-23 03:13:22,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:22,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973319739] [2022-11-23 03:13:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:22,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:22,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973319739] [2022-11-23 03:13:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973319739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455393501] [2022-11-23 03:13:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:22,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:22,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:13:22,448 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:13:22,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:13:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:22,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:13:22,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:13:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:22,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:13:22,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455393501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:22,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:13:22,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-11-23 03:13:22,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995766483] [2022-11-23 03:13:22,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:22,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:22,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:22,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:22,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:13:22,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 480 [2022-11-23 03:13:22,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:22,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:22,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 480 [2022-11-23 03:13:22,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:24,193 INFO L130 PetriNetUnfolder]: 5137/8839 cut-off events. [2022-11-23 03:13:24,193 INFO L131 PetriNetUnfolder]: For 10431/10431 co-relation queries the response was YES. [2022-11-23 03:13:24,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24298 conditions, 8839 events. 5137/8839 cut-off events. For 10431/10431 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 59717 event pairs, 4127 based on Foata normal form. 640/9325 useless extension candidates. Maximal degree in co-relation 24266. Up to 8839 conditions per place. [2022-11-23 03:13:24,245 INFO L137 encePairwiseOnDemand]: 478/480 looper letters, 51 selfloop transitions, 1 changer transitions 12/64 dead transitions. [2022-11-23 03:13:24,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 525 flow [2022-11-23 03:13:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:13:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 714 transitions. [2022-11-23 03:13:24,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2022-11-23 03:13:24,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 714 transitions. [2022-11-23 03:13:24,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 714 transitions. [2022-11-23 03:13:24,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:24,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 714 transitions. [2022-11-23 03:13:24,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:24,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:24,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:24,259 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 412 flow. Second operand 3 states and 714 transitions. [2022-11-23 03:13:24,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 525 flow [2022-11-23 03:13:24,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 516 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-23 03:13:24,307 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 346 flow [2022-11-23 03:13:24,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2022-11-23 03:13:24,308 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2022-11-23 03:13:24,309 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 346 flow [2022-11-23 03:13:24,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:24,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:24,310 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:24,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:24,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 03:13:24,516 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1348864486, now seen corresponding path program 1 times [2022-11-23 03:13:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:24,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323737678] [2022-11-23 03:13:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:13:24,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323737678] [2022-11-23 03:13:24,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323737678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:24,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:24,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:13:24,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647909937] [2022-11-23 03:13:24,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:24,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:13:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:13:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:13:24,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 480 [2022-11-23 03:13:24,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:24,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:24,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 480 [2022-11-23 03:13:24,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:25,351 INFO L130 PetriNetUnfolder]: 1249/2163 cut-off events. [2022-11-23 03:13:25,351 INFO L131 PetriNetUnfolder]: For 1978/1978 co-relation queries the response was YES. [2022-11-23 03:13:25,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6792 conditions, 2163 events. 1249/2163 cut-off events. For 1978/1978 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11187 event pairs, 955 based on Foata normal form. 14/2037 useless extension candidates. Maximal degree in co-relation 6763. Up to 2097 conditions per place. [2022-11-23 03:13:25,364 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 38 selfloop transitions, 13 changer transitions 19/70 dead transitions. [2022-11-23 03:13:25,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 70 transitions, 562 flow [2022-11-23 03:13:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:13:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:13:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1137 transitions. [2022-11-23 03:13:25,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47375 [2022-11-23 03:13:25,370 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1137 transitions. [2022-11-23 03:13:25,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1137 transitions. [2022-11-23 03:13:25,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:25,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1137 transitions. [2022-11-23 03:13:25,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.4) internal successors, (1137), 5 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:25,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:25,381 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:25,381 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 346 flow. Second operand 5 states and 1137 transitions. [2022-11-23 03:13:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 70 transitions, 562 flow [2022-11-23 03:13:25,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 525 flow, removed 3 selfloop flow, removed 8 redundant places. [2022-11-23 03:13:25,394 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 350 flow [2022-11-23 03:13:25,394 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2022-11-23 03:13:25,395 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2022-11-23 03:13:25,395 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 350 flow [2022-11-23 03:13:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:25,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:25,396 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:25,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 03:13:25,397 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1699739718, now seen corresponding path program 1 times [2022-11-23 03:13:25,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:25,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256961635] [2022-11-23 03:13:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:25,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:25,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:25,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256961635] [2022-11-23 03:13:25,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256961635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:25,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491841295] [2022-11-23 03:13:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:25,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:25,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:13:25,638 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:13:25,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:13:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:25,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:13:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:13:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:25,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:13:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:13:25,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491841295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:13:25,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:13:25,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-11-23 03:13:25,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932905623] [2022-11-23 03:13:25,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:13:25,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:13:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:25,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:13:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:13:27,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 480 [2022-11-23 03:13:27,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 350 flow. Second operand has 16 states, 16 states have (on average 211.75) internal successors, (3388), 16 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:27,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:27,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 480 [2022-11-23 03:13:27,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:28,019 INFO L130 PetriNetUnfolder]: 1838/3277 cut-off events. [2022-11-23 03:13:28,019 INFO L131 PetriNetUnfolder]: For 1795/1795 co-relation queries the response was YES. [2022-11-23 03:13:28,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9568 conditions, 3277 events. 1838/3277 cut-off events. For 1795/1795 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19930 event pairs, 910 based on Foata normal form. 154/3305 useless extension candidates. Maximal degree in co-relation 9542. Up to 1875 conditions per place. [2022-11-23 03:13:28,034 INFO L137 encePairwiseOnDemand]: 471/480 looper letters, 43 selfloop transitions, 20 changer transitions 87/150 dead transitions. [2022-11-23 03:13:28,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 150 transitions, 1038 flow [2022-11-23 03:13:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 03:13:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 03:13:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4100 transitions. [2022-11-23 03:13:28,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44956140350877194 [2022-11-23 03:13:28,041 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4100 transitions. [2022-11-23 03:13:28,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4100 transitions. [2022-11-23 03:13:28,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:28,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4100 transitions. [2022-11-23 03:13:28,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 215.78947368421052) internal successors, (4100), 19 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:28,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 480.0) internal successors, (9600), 20 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:28,065 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 480.0) internal successors, (9600), 20 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:28,065 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 350 flow. Second operand 19 states and 4100 transitions. [2022-11-23 03:13:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 150 transitions, 1038 flow [2022-11-23 03:13:28,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 150 transitions, 994 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-23 03:13:28,092 INFO L231 Difference]: Finished difference. Result has 85 places, 54 transitions, 439 flow [2022-11-23 03:13:28,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=439, PETRI_PLACES=85, PETRI_TRANSITIONS=54} [2022-11-23 03:13:28,093 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 49 predicate places. [2022-11-23 03:13:28,093 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 54 transitions, 439 flow [2022-11-23 03:13:28,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 211.75) internal successors, (3388), 16 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:28,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:28,095 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-11-23 03:13:28,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 03:13:28,312 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 701104254, now seen corresponding path program 2 times [2022-11-23 03:13:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:28,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902135116] [2022-11-23 03:13:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:28,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:28,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902135116] [2022-11-23 03:13:28,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902135116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315987218] [2022-11-23 03:13:28,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:13:28,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:28,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:13:28,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:13:28,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:13:28,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:13:28,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:13:28,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:13:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:13:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 03:13:28,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:13:28,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315987218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:28,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:13:28,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-23 03:13:28,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222055795] [2022-11-23 03:13:28,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:28,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:13:28,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:28,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:13:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:13:28,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 480 [2022-11-23 03:13:28,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 54 transitions, 439 flow. Second operand has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:28,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:28,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 480 [2022-11-23 03:13:28,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:29,184 INFO L130 PetriNetUnfolder]: 1164/2108 cut-off events. [2022-11-23 03:13:29,184 INFO L131 PetriNetUnfolder]: For 3815/3815 co-relation queries the response was YES. [2022-11-23 03:13:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7272 conditions, 2108 events. 1164/2108 cut-off events. For 3815/3815 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11416 event pairs, 900 based on Foata normal form. 3/1985 useless extension candidates. Maximal degree in co-relation 7235. Up to 2108 conditions per place. [2022-11-23 03:13:29,197 INFO L137 encePairwiseOnDemand]: 478/480 looper letters, 46 selfloop transitions, 1 changer transitions 5/52 dead transitions. [2022-11-23 03:13:29,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 52 transitions, 494 flow [2022-11-23 03:13:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:13:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2022-11-23 03:13:29,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48541666666666666 [2022-11-23 03:13:29,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2022-11-23 03:13:29,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2022-11-23 03:13:29,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:29,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2022-11-23 03:13:29,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:29,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:29,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:29,205 INFO L175 Difference]: Start difference. First operand has 85 places, 54 transitions, 439 flow. Second operand 3 states and 699 transitions. [2022-11-23 03:13:29,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 52 transitions, 494 flow [2022-11-23 03:13:29,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 359 flow, removed 15 selfloop flow, removed 24 redundant places. [2022-11-23 03:13:29,224 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 228 flow [2022-11-23 03:13:29,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-11-23 03:13:29,225 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2022-11-23 03:13:29,225 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 228 flow [2022-11-23 03:13:29,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:29,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:13:29,226 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:29,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:29,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:29,432 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-23 03:13:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:29,433 INFO L85 PathProgramCache]: Analyzing trace with hash -377729130, now seen corresponding path program 2 times [2022-11-23 03:13:29,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:29,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287850409] [2022-11-23 03:13:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:29,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 03:13:29,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287850409] [2022-11-23 03:13:29,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287850409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:13:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536973850] [2022-11-23 03:13:29,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:13:29,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:29,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:13:29,528 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:13:29,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:13:29,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:13:29,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:13:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:13:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:13:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:13:29,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:13:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:13:29,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536973850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:13:29,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:13:29,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2022-11-23 03:13:29,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018920150] [2022-11-23 03:13:29,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:13:29,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:13:29,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:13:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:13:29,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 480 [2022-11-23 03:13:29,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 231.66666666666666) internal successors, (1390), 6 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:29,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:13:29,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 480 [2022-11-23 03:13:29,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:13:30,242 INFO L130 PetriNetUnfolder]: 1459/2498 cut-off events. [2022-11-23 03:13:30,243 INFO L131 PetriNetUnfolder]: For 799/799 co-relation queries the response was YES. [2022-11-23 03:13:30,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6575 conditions, 2498 events. 1459/2498 cut-off events. For 799/799 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14152 event pairs, 207 based on Foata normal form. 0/2498 useless extension candidates. Maximal degree in co-relation 6557. Up to 738 conditions per place. [2022-11-23 03:13:30,248 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 0 selfloop transitions, 0 changer transitions 74/74 dead transitions. [2022-11-23 03:13:30,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 457 flow [2022-11-23 03:13:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:13:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:13:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1412 transitions. [2022-11-23 03:13:30,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49027777777777776 [2022-11-23 03:13:30,251 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1412 transitions. [2022-11-23 03:13:30,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1412 transitions. [2022-11-23 03:13:30,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:13:30,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1412 transitions. [2022-11-23 03:13:30,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.33333333333334) internal successors, (1412), 6 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:30,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:30,258 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:30,258 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 228 flow. Second operand 6 states and 1412 transitions. [2022-11-23 03:13:30,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 457 flow [2022-11-23 03:13:30,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 74 transitions, 437 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-23 03:13:30,262 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2022-11-23 03:13:30,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2022-11-23 03:13:30,263 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 10 predicate places. [2022-11-23 03:13:30,263 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2022-11-23 03:13:30,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 231.66666666666666) internal successors, (1390), 6 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:30,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 22 remaining) [2022-11-23 03:13:30,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 22 remaining) [2022-11-23 03:13:30,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 22 remaining) [2022-11-23 03:13:30,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 22 remaining) [2022-11-23 03:13:30,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 22 remaining) [2022-11-23 03:13:30,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 22 remaining) [2022-11-23 03:13:30,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 22 remaining) [2022-11-23 03:13:30,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 22 remaining) [2022-11-23 03:13:30,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 22 remaining) [2022-11-23 03:13:30,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 22 remaining) [2022-11-23 03:13:30,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 22 remaining) [2022-11-23 03:13:30,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 22 remaining) [2022-11-23 03:13:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 22 remaining) [2022-11-23 03:13:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 22 remaining) [2022-11-23 03:13:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 22 remaining) [2022-11-23 03:13:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 22 remaining) [2022-11-23 03:13:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 22 remaining) [2022-11-23 03:13:30,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 22 remaining) [2022-11-23 03:13:30,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 22 remaining) [2022-11-23 03:13:30,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 22 remaining) [2022-11-23 03:13:30,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 22 remaining) [2022-11-23 03:13:30,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 22 remaining) [2022-11-23 03:13:30,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:13:30,477 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:30,481 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-23 03:13:30,482 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 03:13:30,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:13:30 BasicIcfg [2022-11-23 03:13:30,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 03:13:30,485 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 03:13:30,486 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 03:13:30,486 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 03:13:30,486 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:12:39" (3/4) ... [2022-11-23 03:13:30,489 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 03:13:30,495 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-11-23 03:13:30,495 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-11-23 03:13:30,501 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2022-11-23 03:13:30,502 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-23 03:13:30,502 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-23 03:13:30,503 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 03:13:30,561 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/witness.graphml [2022-11-23 03:13:30,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 03:13:30,562 INFO L158 Benchmark]: Toolchain (without parser) took 52041.34ms. Allocated memory was 140.5MB in the beginning and 9.7GB in the end (delta: 9.5GB). Free memory was 108.8MB in the beginning and 6.6GB in the end (delta: -6.4GB). Peak memory consumption was 3.1GB. Max. memory is 16.1GB. [2022-11-23 03:13:30,562 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 109.1MB. Free memory is still 62.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 03:13:30,563 INFO L158 Benchmark]: CACSL2BoogieTranslator took 351.73ms. Allocated memory is still 140.5MB. Free memory was 108.1MB in the beginning and 96.3MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 03:13:30,563 INFO L158 Benchmark]: Boogie Procedure Inliner took 91.09ms. Allocated memory is still 140.5MB. Free memory was 96.3MB in the beginning and 94.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 03:13:30,564 INFO L158 Benchmark]: Boogie Preprocessor took 88.67ms. Allocated memory is still 140.5MB. Free memory was 94.8MB in the beginning and 92.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 03:13:30,564 INFO L158 Benchmark]: RCFGBuilder took 831.35ms. Allocated memory is still 140.5MB. Free memory was 92.7MB in the beginning and 72.4MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-23 03:13:30,564 INFO L158 Benchmark]: TraceAbstraction took 50594.46ms. Allocated memory was 140.5MB in the beginning and 9.7GB in the end (delta: 9.5GB). Free memory was 71.8MB in the beginning and 6.6GB in the end (delta: -6.5GB). Peak memory consumption was 3.0GB. Max. memory is 16.1GB. [2022-11-23 03:13:30,565 INFO L158 Benchmark]: Witness Printer took 76.03ms. Allocated memory is still 9.7GB. Free memory was 6.6GB in the beginning and 6.6GB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 03:13:30,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 109.1MB. Free memory is still 62.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 351.73ms. Allocated memory is still 140.5MB. Free memory was 108.1MB in the beginning and 96.3MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 91.09ms. Allocated memory is still 140.5MB. Free memory was 96.3MB in the beginning and 94.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 88.67ms. Allocated memory is still 140.5MB. Free memory was 94.8MB in the beginning and 92.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 831.35ms. Allocated memory is still 140.5MB. Free memory was 92.7MB in the beginning and 72.4MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 50594.46ms. Allocated memory was 140.5MB in the beginning and 9.7GB in the end (delta: 9.5GB). Free memory was 71.8MB in the beginning and 6.6GB in the end (delta: -6.5GB). Peak memory consumption was 3.0GB. Max. memory is 16.1GB. * Witness Printer took 76.03ms. Allocated memory is still 9.7GB. Free memory was 6.6GB in the beginning and 6.6GB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.6s, 201 PlacesBefore, 36 PlacesAfterwards, 212 TransitionsBefore, 36 TransitionsAfterwards, 4028 CoEnabledTransitionPairs, 7 FixpointIterations, 112 TrivialSequentialCompositions, 72 ConcurrentSequentialCompositions, 24 TrivialYvCompositions, 12 ConcurrentYvCompositions, 11 ChoiceCompositions, 231 TotalNumberOfCompositions, 4791 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4186, independent: 4097, independent conditional: 0, independent unconditional: 4097, dependent: 89, dependent conditional: 0, dependent unconditional: 89, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2749, independent: 2722, independent conditional: 0, independent unconditional: 2722, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2749, independent: 2722, independent conditional: 0, independent unconditional: 2722, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 27, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 87, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 87, dependent conditional: 0, dependent unconditional: 87, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4186, independent: 1375, independent conditional: 0, independent unconditional: 1375, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 2749, unknown conditional: 0, unknown unconditional: 2749] , Statistics on independence cache: Total cache size (in pairs): 131, Positive cache size: 122, Positive conditional cache size: 0, Positive unconditional cache size: 122, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 57]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 57]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 49]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 49]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 77]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 77]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 69]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 69]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 115]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 115]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 115]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 115]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 299 locations, 22 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 50.3s, OverallIterations: 20, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 32.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3863 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2971 mSDsluCounter, 1160 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 842 mSDsCounter, 225 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5947 IncrementalHoareTripleChecker+Invalid, 6172 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 225 mSolverCounterUnsat, 318 mSDtfsCounter, 5947 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 232 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=448occurred in iteration=14, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 254 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 270 ConstructedInterpolants, 0 QuantifiedInterpolants, 989 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1673 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 37 InterpolantComputations, 16 PerfectInterpolantSequences, 113/229 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-23 03:13:30,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38731059-ab15-4774-bb9f-1c44c3a6335c/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE