./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f 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_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8 --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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- 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-e04fb08 [2022-11-16 11:24:59,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:24:59,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:24:59,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:24:59,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:24:59,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:24:59,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:24:59,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:24:59,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:24:59,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:24:59,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:24:59,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:24:59,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:24:59,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:24:59,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:24:59,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:24:59,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:24:59,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:24:59,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:24:59,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:24:59,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:24:59,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:24:59,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:24:59,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:24:59,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:24:59,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:24:59,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:24:59,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:24:59,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:24:59,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:24:59,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:24:59,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:24:59,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:24:59,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:24:59,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:24:59,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:24:59,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:24:59,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:24:59,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:24:59,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:24:59,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:24:59,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:24:59,394 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:24:59,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:24:59,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:24:59,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:24:59,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:24:59,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:24:59,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:24:59,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:24:59,402 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:24:59,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:24:59,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:24:59,404 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:24:59,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:24:59,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:24:59,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:24:59,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:24:59,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:24:59,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:24:59,405 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:24:59,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:24:59,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:24:59,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:24:59,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:24:59,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:24:59,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:24:59,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:24:59,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:24:59,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:24:59,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:24:59,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:24:59,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:24:59,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:24:59,409 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:24:59,409 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:24:59,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:24:59,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-16 11:24:59,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:24:59,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:24:59,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:24:59,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:24:59,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:24:59,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-16 11:24:59,790 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/data/84dea07a9/7d9167092fd34d9d9f6beee10b543852/FLAG304826ebc [2022-11-16 11:25:00,254 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:25:00,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-16 11:25:00,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/data/84dea07a9/7d9167092fd34d9d9f6beee10b543852/FLAG304826ebc [2022-11-16 11:25:00,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/data/84dea07a9/7d9167092fd34d9d9f6beee10b543852 [2022-11-16 11:25:00,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:25:00,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:25:00,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:25:00,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:25:00,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:25:00,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515b2632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00, skipping insertion in model container [2022-11-16 11:25:00,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:25:00,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:25:00,870 WARN L229 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_9bc03101-88ec-45a5-9a94-c1e45f8ec051/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-16 11:25:00,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:25:00,884 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:25:00,905 WARN L229 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_9bc03101-88ec-45a5-9a94-c1e45f8ec051/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-16 11:25:00,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:25:00,921 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:25:00,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00 WrapperNode [2022-11-16 11:25:00,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:25:00,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:25:00,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:25:00,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:25:00,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,966 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 201 [2022-11-16 11:25:00,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:25:00,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:25:00,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:25:00,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:25:00,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,992 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:00,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:25:00,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:25:00,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:25:00,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:25:00,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (1/1) ... [2022-11-16 11:25:01,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:25:01,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:01,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:25:01,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:25:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:25:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:25:01,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:25:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:25:01,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:25:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:25:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:25:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:25:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:25:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:25:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:25:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:25:01,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:25:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:25:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:25:01,089 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:25:01,185 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:25:01,187 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:25:01,709 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:25:01,891 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:25:01,891 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:25:01,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:25:01 BoogieIcfgContainer [2022-11-16 11:25:01,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:25:01,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:25:01,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:25:01,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:25:01,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:25:00" (1/3) ... [2022-11-16 11:25:01,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649f2247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:25:01, skipping insertion in model container [2022-11-16 11:25:01,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:00" (2/3) ... [2022-11-16 11:25:01,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649f2247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:25:01, skipping insertion in model container [2022-11-16 11:25:01,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:25:01" (3/3) ... [2022-11-16 11:25:01,903 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-11-16 11:25:01,912 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:25:01,922 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:25:01,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-16 11:25:01,923 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:25:02,002 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:25:02,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 180 transitions, 376 flow [2022-11-16 11:25:02,120 INFO L130 PetriNetUnfolder]: 13/178 cut-off events. [2022-11-16 11:25:02,121 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:25:02,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 178 events. 13/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 120 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 140. Up to 2 conditions per place. [2022-11-16 11:25:02,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 180 transitions, 376 flow [2022-11-16 11:25:02,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 159 transitions, 327 flow [2022-11-16 11:25:02,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:25:02,148 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;@715ad3bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:25:02,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-16 11:25:02,164 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-16 11:25:02,165 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:25:02,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:02,166 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:02,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:02,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:02,172 INFO L85 PathProgramCache]: Analyzing trace with hash 822045203, now seen corresponding path program 1 times [2022-11-16 11:25:02,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:02,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204362977] [2022-11-16 11:25:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:02,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:02,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204362977] [2022-11-16 11:25:02,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204362977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:02,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:02,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:25:02,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000938549] [2022-11-16 11:25:02,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:02,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:25:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:25:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:25:02,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-16 11:25:02,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 159 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:02,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:02,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-16 11:25:02,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:02,858 INFO L130 PetriNetUnfolder]: 23/315 cut-off events. [2022-11-16 11:25:02,858 INFO L131 PetriNetUnfolder]: For 30/32 co-relation queries the response was YES. [2022-11-16 11:25:02,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 315 events. 23/315 cut-off events. For 30/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 853 event pairs, 6 based on Foata normal form. 22/291 useless extension candidates. Maximal degree in co-relation 236. Up to 42 conditions per place. [2022-11-16 11:25:02,862 INFO L137 encePairwiseOnDemand]: 159/180 looper letters, 42 selfloop transitions, 9 changer transitions 4/173 dead transitions. [2022-11-16 11:25:02,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 173 transitions, 466 flow [2022-11-16 11:25:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:25:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:25:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 767 transitions. [2022-11-16 11:25:02,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8522222222222222 [2022-11-16 11:25:02,879 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 767 transitions. [2022-11-16 11:25:02,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 767 transitions. [2022-11-16 11:25:02,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:02,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 767 transitions. [2022-11-16 11:25:02,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:02,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:02,899 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:02,901 INFO L175 Difference]: Start difference. First operand has 154 places, 159 transitions, 327 flow. Second operand 5 states and 767 transitions. [2022-11-16 11:25:02,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 173 transitions, 466 flow [2022-11-16 11:25:02,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 173 transitions, 456 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:25:02,910 INFO L231 Difference]: Finished difference. Result has 158 places, 154 transitions, 365 flow [2022-11-16 11:25:02,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=158, PETRI_TRANSITIONS=154} [2022-11-16 11:25:02,916 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 4 predicate places. [2022-11-16 11:25:02,917 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 154 transitions, 365 flow [2022-11-16 11:25:02,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:02,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:02,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:02,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:25:02,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1012410176, now seen corresponding path program 1 times [2022-11-16 11:25:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:02,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514707790] [2022-11-16 11:25:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:02,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:03,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:03,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514707790] [2022-11-16 11:25:03,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514707790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:03,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259593457] [2022-11-16 11:25:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:03,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:03,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:03,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:03,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:25:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:03,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:25:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:03,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:03,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259593457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:03,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:03,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:25:03,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45128808] [2022-11-16 11:25:03,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:03,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:25:03,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:25:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:25:03,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-16 11:25:03,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 154 transitions, 365 flow. Second operand has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:03,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:03,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-16 11:25:03,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:03,982 INFO L130 PetriNetUnfolder]: 56/675 cut-off events. [2022-11-16 11:25:03,982 INFO L131 PetriNetUnfolder]: For 47/52 co-relation queries the response was YES. [2022-11-16 11:25:03,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 675 events. 56/675 cut-off events. For 47/52 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2899 event pairs, 15 based on Foata normal form. 6/586 useless extension candidates. Maximal degree in co-relation 544. Up to 35 conditions per place. [2022-11-16 11:25:03,988 INFO L137 encePairwiseOnDemand]: 165/180 looper letters, 81 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2022-11-16 11:25:03,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 239 transitions, 843 flow [2022-11-16 11:25:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:25:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:25:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2647 transitions. [2022-11-16 11:25:03,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8169753086419753 [2022-11-16 11:25:03,995 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2647 transitions. [2022-11-16 11:25:03,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2647 transitions. [2022-11-16 11:25:03,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:03,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2647 transitions. [2022-11-16 11:25:04,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 147.05555555555554) internal successors, (2647), 18 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,012 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,012 INFO L175 Difference]: Start difference. First operand has 158 places, 154 transitions, 365 flow. Second operand 18 states and 2647 transitions. [2022-11-16 11:25:04,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 239 transitions, 843 flow [2022-11-16 11:25:04,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 239 transitions, 838 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:25:04,019 INFO L231 Difference]: Finished difference. Result has 174 places, 181 transitions, 598 flow [2022-11-16 11:25:04,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=598, PETRI_PLACES=174, PETRI_TRANSITIONS=181} [2022-11-16 11:25:04,020 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 20 predicate places. [2022-11-16 11:25:04,020 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 181 transitions, 598 flow [2022-11-16 11:25:04,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:04,022 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:04,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:04,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:04,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1319944917, now seen corresponding path program 1 times [2022-11-16 11:25:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:04,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436199412] [2022-11-16 11:25:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:04,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:04,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:04,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436199412] [2022-11-16 11:25:04,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436199412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:04,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905629093] [2022-11-16 11:25:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:04,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:04,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:04,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:04,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:25:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:04,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:25:04,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:04,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:25:04,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905629093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:04,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:25:04,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:25:04,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765471386] [2022-11-16 11:25:04,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:04,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:25:04,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:04,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:25:04,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:25:04,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-16 11:25:04,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 181 transitions, 598 flow. Second operand has 6 states, 6 states have (on average 142.33333333333334) internal successors, (854), 6 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:04,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-16 11:25:04,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:04,853 INFO L130 PetriNetUnfolder]: 56/667 cut-off events. [2022-11-16 11:25:04,853 INFO L131 PetriNetUnfolder]: For 141/146 co-relation queries the response was YES. [2022-11-16 11:25:04,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 667 events. 56/667 cut-off events. For 141/146 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2859 event pairs, 15 based on Foata normal form. 8/580 useless extension candidates. Maximal degree in co-relation 746. Up to 96 conditions per place. [2022-11-16 11:25:04,857 INFO L137 encePairwiseOnDemand]: 169/180 looper letters, 43 selfloop transitions, 27 changer transitions 0/188 dead transitions. [2022-11-16 11:25:04,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 188 transitions, 722 flow [2022-11-16 11:25:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:25:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:25:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1031 transitions. [2022-11-16 11:25:04,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8182539682539682 [2022-11-16 11:25:04,861 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1031 transitions. [2022-11-16 11:25:04,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1031 transitions. [2022-11-16 11:25:04,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:04,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1031 transitions. [2022-11-16 11:25:04,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,868 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,868 INFO L175 Difference]: Start difference. First operand has 174 places, 181 transitions, 598 flow. Second operand 7 states and 1031 transitions. [2022-11-16 11:25:04,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 188 transitions, 722 flow [2022-11-16 11:25:04,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 188 transitions, 648 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-16 11:25:04,879 INFO L231 Difference]: Finished difference. Result has 169 places, 173 transitions, 524 flow [2022-11-16 11:25:04,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=169, PETRI_TRANSITIONS=173} [2022-11-16 11:25:04,882 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 15 predicate places. [2022-11-16 11:25:04,882 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 173 transitions, 524 flow [2022-11-16 11:25:04,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.33333333333334) internal successors, (854), 6 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,883 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:04,883 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:04,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:05,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:05,088 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash 465409555, now seen corresponding path program 1 times [2022-11-16 11:25:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:05,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591455612] [2022-11-16 11:25:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:05,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:05,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:05,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591455612] [2022-11-16 11:25:05,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591455612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:05,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:05,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:25:05,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689857346] [2022-11-16 11:25:05,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:05,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:25:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:25:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:25:05,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-16 11:25:05,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 173 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:05,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:05,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-16 11:25:05,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:05,482 INFO L130 PetriNetUnfolder]: 276/1147 cut-off events. [2022-11-16 11:25:05,482 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-16 11:25:05,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 1147 events. 276/1147 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6807 event pairs, 70 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 1587. Up to 351 conditions per place. [2022-11-16 11:25:05,491 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 26 selfloop transitions, 4 changer transitions 0/188 dead transitions. [2022-11-16 11:25:05,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 188 transitions, 621 flow [2022-11-16 11:25:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:25:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:25:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 802 transitions. [2022-11-16 11:25:05,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8911111111111111 [2022-11-16 11:25:05,494 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 802 transitions. [2022-11-16 11:25:05,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 802 transitions. [2022-11-16 11:25:05,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:05,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 802 transitions. [2022-11-16 11:25:05,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:05,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:05,499 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:05,499 INFO L175 Difference]: Start difference. First operand has 169 places, 173 transitions, 524 flow. Second operand 5 states and 802 transitions. [2022-11-16 11:25:05,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 188 transitions, 621 flow [2022-11-16 11:25:05,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 188 transitions, 587 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:25:05,505 INFO L231 Difference]: Finished difference. Result has 171 places, 176 transitions, 520 flow [2022-11-16 11:25:05,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=171, PETRI_TRANSITIONS=176} [2022-11-16 11:25:05,506 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 17 predicate places. [2022-11-16 11:25:05,506 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 176 transitions, 520 flow [2022-11-16 11:25:05,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:05,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:05,507 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:05,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:25:05,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1195702445, now seen corresponding path program 2 times [2022-11-16 11:25:05,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:05,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394273642] [2022-11-16 11:25:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:05,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:05,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:05,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394273642] [2022-11-16 11:25:05,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394273642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:05,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960864294] [2022-11-16 11:25:05,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:25:05,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:05,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:05,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:05,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:25:05,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:25:05,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:25:05,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:25:06,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:25:06,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960864294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:06,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:06,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 11:25:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191794637] [2022-11-16 11:25:06,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:06,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:25:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:25:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:25:06,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 180 [2022-11-16 11:25:06,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 176 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 128.61111111111111) internal successors, (2315), 18 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:06,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:06,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 180 [2022-11-16 11:25:06,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:07,643 INFO L130 PetriNetUnfolder]: 85/1088 cut-off events. [2022-11-16 11:25:07,643 INFO L131 PetriNetUnfolder]: For 196/203 co-relation queries the response was YES. [2022-11-16 11:25:07,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1088 events. 85/1088 cut-off events. For 196/203 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 6105 event pairs, 42 based on Foata normal form. 4/994 useless extension candidates. Maximal degree in co-relation 1218. Up to 85 conditions per place. [2022-11-16 11:25:07,650 INFO L137 encePairwiseOnDemand]: 160/180 looper letters, 107 selfloop transitions, 65 changer transitions 0/278 dead transitions. [2022-11-16 11:25:07,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 278 transitions, 1142 flow [2022-11-16 11:25:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:25:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:25:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6301 transitions. [2022-11-16 11:25:07,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7143990929705215 [2022-11-16 11:25:07,663 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6301 transitions. [2022-11-16 11:25:07,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6301 transitions. [2022-11-16 11:25:07,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:07,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6301 transitions. [2022-11-16 11:25:07,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 128.59183673469389) internal successors, (6301), 49 states have internal predecessors, (6301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:07,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 180.0) internal successors, (9000), 50 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:07,700 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 180.0) internal successors, (9000), 50 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:07,701 INFO L175 Difference]: Start difference. First operand has 171 places, 176 transitions, 520 flow. Second operand 49 states and 6301 transitions. [2022-11-16 11:25:07,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 278 transitions, 1142 flow [2022-11-16 11:25:07,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 278 transitions, 1140 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:25:07,708 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 767 flow [2022-11-16 11:25:07,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=767, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2022-11-16 11:25:07,714 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 67 predicate places. [2022-11-16 11:25:07,714 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 767 flow [2022-11-16 11:25:07,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.61111111111111) internal successors, (2315), 18 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:07,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:07,716 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:07,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:07,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:07,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -463800145, now seen corresponding path program 1 times [2022-11-16 11:25:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58614395] [2022-11-16 11:25:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:07,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:08,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:08,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58614395] [2022-11-16 11:25:08,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58614395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:08,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:08,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:25:08,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706648703] [2022-11-16 11:25:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:08,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:25:08,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:25:08,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:25:08,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-16 11:25:08,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 767 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:08,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:08,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-16 11:25:08,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:08,487 INFO L130 PetriNetUnfolder]: 575/2068 cut-off events. [2022-11-16 11:25:08,488 INFO L131 PetriNetUnfolder]: For 446/453 co-relation queries the response was YES. [2022-11-16 11:25:08,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3696 conditions, 2068 events. 575/2068 cut-off events. For 446/453 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 16617 event pairs, 196 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 3424. Up to 736 conditions per place. [2022-11-16 11:25:08,503 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 25 selfloop transitions, 4 changer transitions 0/215 dead transitions. [2022-11-16 11:25:08,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 215 transitions, 856 flow [2022-11-16 11:25:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:25:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:25:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 801 transitions. [2022-11-16 11:25:08,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.89 [2022-11-16 11:25:08,505 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 801 transitions. [2022-11-16 11:25:08,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 801 transitions. [2022-11-16 11:25:08,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:08,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 801 transitions. [2022-11-16 11:25:08,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:08,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:08,510 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:08,510 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 767 flow. Second operand 5 states and 801 transitions. [2022-11-16 11:25:08,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 215 transitions, 856 flow [2022-11-16 11:25:08,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 215 transitions, 773 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-16 11:25:08,517 INFO L231 Difference]: Finished difference. Result has 213 places, 204 transitions, 714 flow [2022-11-16 11:25:08,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=213, PETRI_TRANSITIONS=204} [2022-11-16 11:25:08,518 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 59 predicate places. [2022-11-16 11:25:08,518 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 204 transitions, 714 flow [2022-11-16 11:25:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:08,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:08,519 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:08,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:25:08,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash 114987223, now seen corresponding path program 1 times [2022-11-16 11:25:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:08,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016852957] [2022-11-16 11:25:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:08,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016852957] [2022-11-16 11:25:08,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016852957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691509662] [2022-11-16 11:25:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:08,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:08,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:08,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:08,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:25:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:25:08,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:09,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:25:09,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691509662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:09,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:25:09,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-16 11:25:09,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098100379] [2022-11-16 11:25:09,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:09,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:25:09,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:09,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:25:09,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:25:09,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 180 [2022-11-16 11:25:09,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 204 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:09,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:09,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 180 [2022-11-16 11:25:09,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:09,511 INFO L130 PetriNetUnfolder]: 120/1672 cut-off events. [2022-11-16 11:25:09,511 INFO L131 PetriNetUnfolder]: For 392/399 co-relation queries the response was YES. [2022-11-16 11:25:09,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2782 conditions, 1672 events. 120/1672 cut-off events. For 392/399 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 11382 event pairs, 70 based on Foata normal form. 28/1609 useless extension candidates. Maximal degree in co-relation 2378. Up to 244 conditions per place. [2022-11-16 11:25:09,523 INFO L137 encePairwiseOnDemand]: 168/180 looper letters, 75 selfloop transitions, 22 changer transitions 10/238 dead transitions. [2022-11-16 11:25:09,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 238 transitions, 1072 flow [2022-11-16 11:25:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:25:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:25:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1414 transitions. [2022-11-16 11:25:09,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7855555555555556 [2022-11-16 11:25:09,532 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1414 transitions. [2022-11-16 11:25:09,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1414 transitions. [2022-11-16 11:25:09,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:09,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1414 transitions. [2022-11-16 11:25:09,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.4) internal successors, (1414), 10 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:09,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 180.0) internal successors, (1980), 11 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:09,541 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 180.0) internal successors, (1980), 11 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:09,542 INFO L175 Difference]: Start difference. First operand has 213 places, 204 transitions, 714 flow. Second operand 10 states and 1414 transitions. [2022-11-16 11:25:09,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 238 transitions, 1072 flow [2022-11-16 11:25:09,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 238 transitions, 1070 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:25:09,552 INFO L231 Difference]: Finished difference. Result has 223 places, 205 transitions, 770 flow [2022-11-16 11:25:09,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=770, PETRI_PLACES=223, PETRI_TRANSITIONS=205} [2022-11-16 11:25:09,553 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 69 predicate places. [2022-11-16 11:25:09,554 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 205 transitions, 770 flow [2022-11-16 11:25:09,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:09,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:09,554 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:09,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:09,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash 568080778, now seen corresponding path program 1 times [2022-11-16 11:25:09,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:09,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844613725] [2022-11-16 11:25:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:09,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:25:09,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844613725] [2022-11-16 11:25:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844613725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807616275] [2022-11-16 11:25:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:09,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:09,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:09,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:09,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:25:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:10,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:25:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:25:10,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:25:10,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807616275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:10,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:10,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:25:10,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943874481] [2022-11-16 11:25:10,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:25:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:25:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:25:10,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-16 11:25:10,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 205 transitions, 770 flow. Second operand has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:10,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:10,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-16 11:25:10,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:11,317 INFO L130 PetriNetUnfolder]: 1072/4094 cut-off events. [2022-11-16 11:25:11,317 INFO L131 PetriNetUnfolder]: For 1057/1253 co-relation queries the response was YES. [2022-11-16 11:25:11,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 4094 events. 1072/4094 cut-off events. For 1057/1253 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 36219 event pairs, 175 based on Foata normal form. 91/3849 useless extension candidates. Maximal degree in co-relation 8306. Up to 842 conditions per place. [2022-11-16 11:25:11,357 INFO L137 encePairwiseOnDemand]: 173/180 looper letters, 67 selfloop transitions, 18 changer transitions 0/272 dead transitions. [2022-11-16 11:25:11,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 272 transitions, 1172 flow [2022-11-16 11:25:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:25:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:25:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2860 transitions. [2022-11-16 11:25:11,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8827160493827161 [2022-11-16 11:25:11,363 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2860 transitions. [2022-11-16 11:25:11,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2860 transitions. [2022-11-16 11:25:11,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:11,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2860 transitions. [2022-11-16 11:25:11,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.88888888888889) internal successors, (2860), 18 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:11,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:11,391 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:11,391 INFO L175 Difference]: Start difference. First operand has 223 places, 205 transitions, 770 flow. Second operand 18 states and 2860 transitions. [2022-11-16 11:25:11,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 272 transitions, 1172 flow [2022-11-16 11:25:11,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 272 transitions, 1144 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:25:11,403 INFO L231 Difference]: Finished difference. Result has 238 places, 217 transitions, 848 flow [2022-11-16 11:25:11,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=848, PETRI_PLACES=238, PETRI_TRANSITIONS=217} [2022-11-16 11:25:11,406 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 84 predicate places. [2022-11-16 11:25:11,406 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 217 transitions, 848 flow [2022-11-16 11:25:11,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:11,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:11,407 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:11,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:11,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:25:11,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:11,614 INFO L85 PathProgramCache]: Analyzing trace with hash 430635579, now seen corresponding path program 1 times [2022-11-16 11:25:11,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:11,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552171251] [2022-11-16 11:25:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:25:11,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552171251] [2022-11-16 11:25:11,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552171251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:11,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044648514] [2022-11-16 11:25:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:11,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:11,790 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:11,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:25:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:25:11,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:25:11,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:25:11,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044648514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:11,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:25:11,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:25:11,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866446206] [2022-11-16 11:25:11,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:11,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:25:11,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:25:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:25:11,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-16 11:25:11,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 217 transitions, 848 flow. Second operand has 6 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:11,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:11,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-16 11:25:11,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:13,069 INFO L130 PetriNetUnfolder]: 981/3786 cut-off events. [2022-11-16 11:25:13,070 INFO L131 PetriNetUnfolder]: For 1817/1950 co-relation queries the response was YES. [2022-11-16 11:25:13,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9232 conditions, 3786 events. 981/3786 cut-off events. For 1817/1950 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 33258 event pairs, 91 based on Foata normal form. 119/3618 useless extension candidates. Maximal degree in co-relation 8289. Up to 924 conditions per place. [2022-11-16 11:25:13,108 INFO L137 encePairwiseOnDemand]: 175/180 looper letters, 31 selfloop transitions, 11 changer transitions 0/229 dead transitions. [2022-11-16 11:25:13,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 229 transitions, 962 flow [2022-11-16 11:25:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:25:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:25:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1112 transitions. [2022-11-16 11:25:13,114 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8825396825396825 [2022-11-16 11:25:13,114 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1112 transitions. [2022-11-16 11:25:13,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1112 transitions. [2022-11-16 11:25:13,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:13,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1112 transitions. [2022-11-16 11:25:13,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 158.85714285714286) internal successors, (1112), 7 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:13,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:13,122 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:13,122 INFO L175 Difference]: Start difference. First operand has 238 places, 217 transitions, 848 flow. Second operand 7 states and 1112 transitions. [2022-11-16 11:25:13,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 229 transitions, 962 flow [2022-11-16 11:25:13,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 229 transitions, 930 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 11:25:13,139 INFO L231 Difference]: Finished difference. Result has 234 places, 213 transitions, 811 flow [2022-11-16 11:25:13,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=811, PETRI_PLACES=234, PETRI_TRANSITIONS=213} [2022-11-16 11:25:13,140 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 80 predicate places. [2022-11-16 11:25:13,140 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 213 transitions, 811 flow [2022-11-16 11:25:13,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:13,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:13,141 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:13,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:13,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:13,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1801998332, now seen corresponding path program 1 times [2022-11-16 11:25:13,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:13,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56052055] [2022-11-16 11:25:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:25:13,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:13,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56052055] [2022-11-16 11:25:13,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56052055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:13,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498819926] [2022-11-16 11:25:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:13,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:13,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:13,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:13,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:25:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:13,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:25:13,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:25:13,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:25:13,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498819926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:13,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:25:13,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-16 11:25:13,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052758797] [2022-11-16 11:25:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:13,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:25:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:25:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:25:13,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 180 [2022-11-16 11:25:13,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 213 transitions, 811 flow. Second operand has 7 states, 7 states have (on average 139.85714285714286) internal successors, (979), 7 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:13,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:13,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 180 [2022-11-16 11:25:13,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:14,601 INFO L130 PetriNetUnfolder]: 194/2469 cut-off events. [2022-11-16 11:25:14,601 INFO L131 PetriNetUnfolder]: For 1119/1137 co-relation queries the response was YES. [2022-11-16 11:25:14,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2469 events. 194/2469 cut-off events. For 1119/1137 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 19462 event pairs, 150 based on Foata normal form. 4/2319 useless extension candidates. Maximal degree in co-relation 3939. Up to 472 conditions per place. [2022-11-16 11:25:14,630 INFO L137 encePairwiseOnDemand]: 172/180 looper letters, 64 selfloop transitions, 11 changer transitions 4/218 dead transitions. [2022-11-16 11:25:14,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 218 transitions, 983 flow [2022-11-16 11:25:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:25:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:25:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 994 transitions. [2022-11-16 11:25:14,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7888888888888889 [2022-11-16 11:25:14,633 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 994 transitions. [2022-11-16 11:25:14,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 994 transitions. [2022-11-16 11:25:14,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:14,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 994 transitions. [2022-11-16 11:25:14,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:14,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:14,640 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:14,640 INFO L175 Difference]: Start difference. First operand has 234 places, 213 transitions, 811 flow. Second operand 7 states and 994 transitions. [2022-11-16 11:25:14,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 218 transitions, 983 flow [2022-11-16 11:25:14,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 218 transitions, 969 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:25:14,652 INFO L231 Difference]: Finished difference. Result has 236 places, 212 transitions, 820 flow [2022-11-16 11:25:14,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=820, PETRI_PLACES=236, PETRI_TRANSITIONS=212} [2022-11-16 11:25:14,654 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 82 predicate places. [2022-11-16 11:25:14,654 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 212 transitions, 820 flow [2022-11-16 11:25:14,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.85714285714286) internal successors, (979), 7 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:14,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:14,655 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:14,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:14,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:25:14,861 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1014863807, now seen corresponding path program 1 times [2022-11-16 11:25:14,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:14,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251793291] [2022-11-16 11:25:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:14,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:14,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251793291] [2022-11-16 11:25:14,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251793291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:14,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166555827] [2022-11-16 11:25:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:14,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:14,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:14,990 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:15,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:25:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:25:15,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:15,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:15,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166555827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:15,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:15,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:25:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823689016] [2022-11-16 11:25:15,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:25:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:25:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:25:15,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-16 11:25:15,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 212 transitions, 820 flow. Second operand has 12 states, 12 states have (on average 156.75) internal successors, (1881), 12 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:15,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:15,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-16 11:25:15,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:17,387 INFO L130 PetriNetUnfolder]: 2780/7979 cut-off events. [2022-11-16 11:25:17,387 INFO L131 PetriNetUnfolder]: For 6207/6981 co-relation queries the response was YES. [2022-11-16 11:25:17,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19632 conditions, 7979 events. 2780/7979 cut-off events. For 6207/6981 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 85852 event pairs, 312 based on Foata normal form. 198/7211 useless extension candidates. Maximal degree in co-relation 18852. Up to 1712 conditions per place. [2022-11-16 11:25:17,461 INFO L137 encePairwiseOnDemand]: 173/180 looper letters, 63 selfloop transitions, 18 changer transitions 0/275 dead transitions. [2022-11-16 11:25:17,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 275 transitions, 1226 flow [2022-11-16 11:25:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:25:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:25:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2856 transitions. [2022-11-16 11:25:17,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8814814814814815 [2022-11-16 11:25:17,467 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2856 transitions. [2022-11-16 11:25:17,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2856 transitions. [2022-11-16 11:25:17,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:17,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2856 transitions. [2022-11-16 11:25:17,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.66666666666666) internal successors, (2856), 18 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:17,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:17,480 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:17,480 INFO L175 Difference]: Start difference. First operand has 236 places, 212 transitions, 820 flow. Second operand 18 states and 2856 transitions. [2022-11-16 11:25:17,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 275 transitions, 1226 flow [2022-11-16 11:25:17,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 275 transitions, 1160 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-11-16 11:25:17,498 INFO L231 Difference]: Finished difference. Result has 250 places, 224 transitions, 900 flow [2022-11-16 11:25:17,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=900, PETRI_PLACES=250, PETRI_TRANSITIONS=224} [2022-11-16 11:25:17,499 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 96 predicate places. [2022-11-16 11:25:17,499 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 224 transitions, 900 flow [2022-11-16 11:25:17,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.75) internal successors, (1881), 12 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:17,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:17,500 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:17,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:17,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:25:17,706 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1396006286, now seen corresponding path program 1 times [2022-11-16 11:25:17,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:17,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532254471] [2022-11-16 11:25:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:17,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:17,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532254471] [2022-11-16 11:25:17,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532254471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:17,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324242947] [2022-11-16 11:25:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:17,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:17,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:17,825 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:17,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:25:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:25:17,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:18,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:25:18,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324242947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:18,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:25:18,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:25:18,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075377222] [2022-11-16 11:25:18,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:18,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:25:18,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:18,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:25:18,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:25:18,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-16 11:25:18,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 224 transitions, 900 flow. Second operand has 6 states, 6 states have (on average 156.5) internal successors, (939), 6 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:18,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:18,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-16 11:25:18,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:19,584 INFO L130 PetriNetUnfolder]: 2534/7157 cut-off events. [2022-11-16 11:25:19,584 INFO L131 PetriNetUnfolder]: For 4933/5107 co-relation queries the response was YES. [2022-11-16 11:25:19,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17880 conditions, 7157 events. 2534/7157 cut-off events. For 4933/5107 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 76874 event pairs, 30 based on Foata normal form. 264/6767 useless extension candidates. Maximal degree in co-relation 17096. Up to 2082 conditions per place. [2022-11-16 11:25:19,638 INFO L137 encePairwiseOnDemand]: 175/180 looper letters, 30 selfloop transitions, 11 changer transitions 0/235 dead transitions. [2022-11-16 11:25:19,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 235 transitions, 1004 flow [2022-11-16 11:25:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:25:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:25:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1111 transitions. [2022-11-16 11:25:19,641 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8817460317460317 [2022-11-16 11:25:19,641 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1111 transitions. [2022-11-16 11:25:19,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1111 transitions. [2022-11-16 11:25:19,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:19,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1111 transitions. [2022-11-16 11:25:19,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 158.71428571428572) internal successors, (1111), 7 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:19,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:19,646 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:19,646 INFO L175 Difference]: Start difference. First operand has 250 places, 224 transitions, 900 flow. Second operand 7 states and 1111 transitions. [2022-11-16 11:25:19,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 235 transitions, 1004 flow [2022-11-16 11:25:19,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 235 transitions, 972 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 11:25:19,682 INFO L231 Difference]: Finished difference. Result has 246 places, 220 transitions, 863 flow [2022-11-16 11:25:19,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=246, PETRI_TRANSITIONS=220} [2022-11-16 11:25:19,683 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 92 predicate places. [2022-11-16 11:25:19,683 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 220 transitions, 863 flow [2022-11-16 11:25:19,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 156.5) internal successors, (939), 6 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:19,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:19,684 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:19,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:19,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:25:19,890 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1671571543, now seen corresponding path program 1 times [2022-11-16 11:25:19,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:19,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883826178] [2022-11-16 11:25:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:19,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:20,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:20,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883826178] [2022-11-16 11:25:20,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883826178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:20,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442289424] [2022-11-16 11:25:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:20,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:20,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:20,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:20,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:25:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:20,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:25:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:20,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:20,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442289424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:20,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:20,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-16 11:25:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941921896] [2022-11-16 11:25:20,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:25:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:25:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:25:20,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-16 11:25:20,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 220 transitions, 863 flow. Second operand has 32 states, 32 states have (on average 143.28125) internal successors, (4585), 32 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:20,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:20,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-16 11:25:20,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:24,211 INFO L130 PetriNetUnfolder]: 912/9108 cut-off events. [2022-11-16 11:25:24,212 INFO L131 PetriNetUnfolder]: For 4314/4440 co-relation queries the response was YES. [2022-11-16 11:25:24,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17650 conditions, 9108 events. 912/9108 cut-off events. For 4314/4440 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 95509 event pairs, 770 based on Foata normal form. 16/8480 useless extension candidates. Maximal degree in co-relation 15968. Up to 1262 conditions per place. [2022-11-16 11:25:24,265 INFO L137 encePairwiseOnDemand]: 168/180 looper letters, 224 selfloop transitions, 102 changer transitions 0/472 dead transitions. [2022-11-16 11:25:24,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 472 transitions, 2532 flow [2022-11-16 11:25:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 11:25:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-16 11:25:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6494 transitions. [2022-11-16 11:25:24,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.819949494949495 [2022-11-16 11:25:24,276 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6494 transitions. [2022-11-16 11:25:24,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6494 transitions. [2022-11-16 11:25:24,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:24,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6494 transitions. [2022-11-16 11:25:24,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 147.5909090909091) internal successors, (6494), 44 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:24,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 180.0) internal successors, (8100), 45 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:24,302 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 180.0) internal successors, (8100), 45 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:24,302 INFO L175 Difference]: Start difference. First operand has 246 places, 220 transitions, 863 flow. Second operand 44 states and 6494 transitions. [2022-11-16 11:25:24,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 472 transitions, 2532 flow [2022-11-16 11:25:24,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 472 transitions, 2518 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:25:24,359 INFO L231 Difference]: Finished difference. Result has 293 places, 280 transitions, 1502 flow [2022-11-16 11:25:24,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1502, PETRI_PLACES=293, PETRI_TRANSITIONS=280} [2022-11-16 11:25:24,360 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 139 predicate places. [2022-11-16 11:25:24,360 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 280 transitions, 1502 flow [2022-11-16 11:25:24,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 143.28125) internal successors, (4585), 32 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:24,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:24,361 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:24,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:24,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:25:24,567 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1589000027, now seen corresponding path program 1 times [2022-11-16 11:25:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434886812] [2022-11-16 11:25:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:24,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:24,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434886812] [2022-11-16 11:25:24,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434886812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561227676] [2022-11-16 11:25:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:24,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:24,859 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:24,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:25:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:25:25,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:25,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:25,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561227676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:25,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:25,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-16 11:25:25,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460288204] [2022-11-16 11:25:25,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:25,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:25:25,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:25,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:25:25,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:25:25,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-16 11:25:25,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 280 transitions, 1502 flow. Second operand has 24 states, 24 states have (on average 157.08333333333334) internal successors, (3770), 24 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:25,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:25,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-16 11:25:25,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:32,080 INFO L130 PetriNetUnfolder]: 8332/23990 cut-off events. [2022-11-16 11:25:32,080 INFO L131 PetriNetUnfolder]: For 14196/14644 co-relation queries the response was YES. [2022-11-16 11:25:32,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60949 conditions, 23990 events. 8332/23990 cut-off events. For 14196/14644 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 272818 event pairs, 574 based on Foata normal form. 588/23010 useless extension candidates. Maximal degree in co-relation 59022. Up to 8080 conditions per place. [2022-11-16 11:25:32,306 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 131 selfloop transitions, 32 changer transitions 0/417 dead transitions. [2022-11-16 11:25:32,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 417 transitions, 2330 flow [2022-11-16 11:25:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:25:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-16 11:25:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5097 transitions. [2022-11-16 11:25:32,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8848958333333333 [2022-11-16 11:25:32,314 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5097 transitions. [2022-11-16 11:25:32,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5097 transitions. [2022-11-16 11:25:32,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:32,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5097 transitions. [2022-11-16 11:25:32,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 159.28125) internal successors, (5097), 32 states have internal predecessors, (5097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:32,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:32,333 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:32,333 INFO L175 Difference]: Start difference. First operand has 293 places, 280 transitions, 1502 flow. Second operand 32 states and 5097 transitions. [2022-11-16 11:25:32,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 417 transitions, 2330 flow [2022-11-16 11:25:32,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 417 transitions, 2263 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-11-16 11:25:32,412 INFO L231 Difference]: Finished difference. Result has 316 places, 299 transitions, 1627 flow [2022-11-16 11:25:32,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1627, PETRI_PLACES=316, PETRI_TRANSITIONS=299} [2022-11-16 11:25:32,413 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 162 predicate places. [2022-11-16 11:25:32,413 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 299 transitions, 1627 flow [2022-11-16 11:25:32,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 157.08333333333334) internal successors, (3770), 24 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:32,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:32,415 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:32,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:32,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:32,625 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 80890487, now seen corresponding path program 2 times [2022-11-16 11:25:32,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:32,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992059802] [2022-11-16 11:25:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:32,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:32,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:32,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992059802] [2022-11-16 11:25:32,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992059802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:32,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724947248] [2022-11-16 11:25:32,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:25:32,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:32,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:32,925 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:32,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:25:33,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:25:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:25:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 11:25:33,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 11:25:33,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724947248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:33,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:33,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-16 11:25:33,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904853187] [2022-11-16 11:25:33,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:33,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:25:33,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:25:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:25:33,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 180 [2022-11-16 11:25:33,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 299 transitions, 1627 flow. Second operand has 16 states, 16 states have (on average 150.5625) internal successors, (2409), 16 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:33,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:33,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 180 [2022-11-16 11:25:33,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:52,866 INFO L130 PetriNetUnfolder]: 32104/78870 cut-off events. [2022-11-16 11:25:52,866 INFO L131 PetriNetUnfolder]: For 36030/36030 co-relation queries the response was YES. [2022-11-16 11:25:53,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186565 conditions, 78870 events. 32104/78870 cut-off events. For 36030/36030 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 958608 event pairs, 1722 based on Foata normal form. 1260/66676 useless extension candidates. Maximal degree in co-relation 184038. Up to 11790 conditions per place. [2022-11-16 11:25:53,674 INFO L137 encePairwiseOnDemand]: 171/180 looper letters, 73 selfloop transitions, 23 changer transitions 42/400 dead transitions. [2022-11-16 11:25:53,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 400 transitions, 2175 flow [2022-11-16 11:25:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:25:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 11:25:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3370 transitions. [2022-11-16 11:25:53,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.851010101010101 [2022-11-16 11:25:53,682 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3370 transitions. [2022-11-16 11:25:53,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3370 transitions. [2022-11-16 11:25:53,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:53,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3370 transitions. [2022-11-16 11:25:53,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 153.1818181818182) internal successors, (3370), 22 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:53,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:53,695 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:53,695 INFO L175 Difference]: Start difference. First operand has 316 places, 299 transitions, 1627 flow. Second operand 22 states and 3370 transitions. [2022-11-16 11:25:53,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 400 transitions, 2175 flow [2022-11-16 11:25:55,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 400 transitions, 2129 flow, removed 8 selfloop flow, removed 15 redundant places. [2022-11-16 11:25:55,006 INFO L231 Difference]: Finished difference. Result has 322 places, 297 transitions, 1635 flow [2022-11-16 11:25:55,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1635, PETRI_PLACES=322, PETRI_TRANSITIONS=297} [2022-11-16 11:25:55,007 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 168 predicate places. [2022-11-16 11:25:55,008 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 297 transitions, 1635 flow [2022-11-16 11:25:55,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 150.5625) internal successors, (2409), 16 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:55,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:55,009 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:55,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 11:25:55,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:25:55,214 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-16 11:25:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:55,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1034227675, now seen corresponding path program 2 times [2022-11-16 11:25:55,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:55,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51870339] [2022-11-16 11:25:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:55,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:25:56,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:56,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51870339] [2022-11-16 11:25:56,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51870339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:56,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236195165] [2022-11-16 11:25:56,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:25:56,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:56,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:56,130 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:56,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc03101-88ec-45a5-9a94-c1e45f8ec051/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:25:56,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:25:56,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:25:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-16 11:25:56,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-16 11:25:56,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236195165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:56,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:56,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 27 [2022-11-16 11:25:56,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867531619] [2022-11-16 11:25:56,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:56,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:25:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:56,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:25:56,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:25:56,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 180 [2022-11-16 11:25:56,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 297 transitions, 1635 flow. Second operand has 28 states, 28 states have (on average 150.46428571428572) internal successors, (4213), 28 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:56,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:56,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 180 [2022-11-16 11:25:56,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand