./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:50:14,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:50:14,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:50:14,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:50:14,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:50:14,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:50:14,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:50:14,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:50:14,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:50:14,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:50:14,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:50:14,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:50:14,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:50:14,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:50:14,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:50:14,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:50:14,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:50:14,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:50:14,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:50:14,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:50:14,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:50:14,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:50:14,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:50:14,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:50:14,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:50:14,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:50:14,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:50:14,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:50:14,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:50:14,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:50:14,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:50:14,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:50:14,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:50:14,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:50:14,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:50:14,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:50:14,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:50:14,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:50:14,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:50:14,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:50:14,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:50:14,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-23 02:50:14,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:50:14,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:50:14,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:50:14,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:50:14,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:50:14,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:50:14,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:50:14,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:50:14,204 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:50:14,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:50:14,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:50:14,205 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:50:14,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:50:14,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:50:14,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:50:14,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:50:14,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:50:14,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:50:14,206 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-23 02:50:14,206 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:50:14,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:50:14,207 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:50:14,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:50:14,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:50:14,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:50:14,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:50:14,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:50:14,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:50:14,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:50:14,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:50:14,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:50:14,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:50:14,209 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:50:14,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:50:14,209 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:50:14,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:50:14,210 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-23 02:50:14,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:50:14,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:50:14,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:50:14,550 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:50:14,552 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:50:14,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-23 02:50:17,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:50:17,869 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:50:17,870 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-23 02:50:17,878 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/data/f6ffa714f/b8c18b3e050c440b92acb20f4d1bd2b4/FLAG06b31b634 [2022-11-23 02:50:17,899 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/data/f6ffa714f/b8c18b3e050c440b92acb20f4d1bd2b4 [2022-11-23 02:50:17,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:50:17,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:50:17,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:50:17,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:50:17,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:50:17,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:50:17" (1/1) ... [2022-11-23 02:50:17,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5885e93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:17, skipping insertion in model container [2022-11-23 02:50:17,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:50:17" (1/1) ... [2022-11-23 02:50:17,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:50:17,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:50:18,134 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-23 02:50:18,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:50:18,145 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:50:18,165 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-23 02:50:18,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:50:18,180 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:50:18,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18 WrapperNode [2022-11-23 02:50:18,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:50:18,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:50:18,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:50:18,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:50:18,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,229 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2022-11-23 02:50:18,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:50:18,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:50:18,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:50:18,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:50:18,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,276 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:50:18,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:50:18,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:50:18,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:50:18,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (1/1) ... [2022-11-23 02:50:18,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:50:18,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:18,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:50:18,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:50:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:50:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:50:18,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:50:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:50:18,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:50:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:50:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:50:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:50:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 02:50:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 02:50:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:50:18,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:50:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:50:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:50:18,384 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:50:18,482 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:50:18,486 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:50:18,739 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:50:18,848 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:50:18,858 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 02:50:18,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:18 BoogieIcfgContainer [2022-11-23 02:50:18,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:50:18,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:50:18,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:50:18,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:50:18,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:50:17" (1/3) ... [2022-11-23 02:50:18,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd9f895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:50:18, skipping insertion in model container [2022-11-23 02:50:18,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:18" (2/3) ... [2022-11-23 02:50:18,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd9f895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:50:18, skipping insertion in model container [2022-11-23 02:50:18,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:18" (3/3) ... [2022-11-23 02:50:18,875 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-23 02:50:18,886 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:50:18,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:50:18,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-23 02:50:18,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:50:18,984 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 02:50:19,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 192 flow [2022-11-23 02:50:19,086 INFO L130 PetriNetUnfolder]: 5/86 cut-off events. [2022-11-23 02:50:19,086 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:50:19,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-11-23 02:50:19,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 88 transitions, 192 flow [2022-11-23 02:50:19,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 67 transitions, 143 flow [2022-11-23 02:50:19,101 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:50:19,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 67 transitions, 143 flow [2022-11-23 02:50:19,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 67 transitions, 143 flow [2022-11-23 02:50:19,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 67 transitions, 143 flow [2022-11-23 02:50:19,146 INFO L130 PetriNetUnfolder]: 4/67 cut-off events. [2022-11-23 02:50:19,146 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:50:19,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 67 events. 4/67 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-11-23 02:50:19,148 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2022-11-23 02:50:22,005 INFO L134 LiptonReduction]: Checked pairs total: 1033 [2022-11-23 02:50:22,005 INFO L136 LiptonReduction]: Total number of compositions: 59 [2022-11-23 02:50:22,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:50:22,028 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;@4df1c0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:50:22,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-23 02:50:22,032 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-11-23 02:50:22,032 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:50:22,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:22,033 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 02:50:22,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:22,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:22,039 INFO L85 PathProgramCache]: Analyzing trace with hash 11082179, now seen corresponding path program 1 times [2022-11-23 02:50:22,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:22,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804204583] [2022-11-23 02:50:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:22,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804204583] [2022-11-23 02:50:22,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804204583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:50:22,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:50:22,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:50:22,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321418503] [2022-11-23 02:50:22,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:50:22,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:50:22,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:50:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:50:22,337 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-23 02:50:22,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:22,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-23 02:50:22,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:22,501 INFO L130 PetriNetUnfolder]: 215/331 cut-off events. [2022-11-23 02:50:22,502 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-23 02:50:22,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 331 events. 215/331 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 1221 event pairs, 41 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 595. Up to 303 conditions per place. [2022-11-23 02:50:22,509 INFO L137 encePairwiseOnDemand]: 136/147 looper letters, 21 selfloop transitions, 4 changer transitions 3/30 dead transitions. [2022-11-23 02:50:22,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 131 flow [2022-11-23 02:50:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:50:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:50:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-11-23 02:50:22,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2022-11-23 02:50:22,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-11-23 02:50:22,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-11-23 02:50:22,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:22,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-11-23 02:50:22,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,548 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 255 transitions. [2022-11-23 02:50:22,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 131 flow [2022-11-23 02:50:22,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 02:50:22,554 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 80 flow [2022-11-23 02:50:22,556 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2022-11-23 02:50:22,559 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2022-11-23 02:50:22,559 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 80 flow [2022-11-23 02:50:22,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:22,560 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:50:22,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:50:22,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:22,561 INFO L85 PathProgramCache]: Analyzing trace with hash 343548796, now seen corresponding path program 1 times [2022-11-23 02:50:22,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:22,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336569011] [2022-11-23 02:50:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:22,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:22,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:22,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336569011] [2022-11-23 02:50:22,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336569011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:22,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547619157] [2022-11-23 02:50:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:22,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:22,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:22,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:22,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:50:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:22,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:50:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:22,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:50:22,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547619157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:50:22,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:50:22,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-23 02:50:22,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304235650] [2022-11-23 02:50:22,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:50:22,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:50:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:50:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:50:22,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-23 02:50:22,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:22,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-23 02:50:22,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:22,977 INFO L130 PetriNetUnfolder]: 187/293 cut-off events. [2022-11-23 02:50:22,977 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-23 02:50:22,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 293 events. 187/293 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1092 event pairs, 37 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 673. Up to 254 conditions per place. [2022-11-23 02:50:22,981 INFO L137 encePairwiseOnDemand]: 143/147 looper letters, 25 selfloop transitions, 3 changer transitions 3/32 dead transitions. [2022-11-23 02:50:22,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 160 flow [2022-11-23 02:50:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:50:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:50:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 321 transitions. [2022-11-23 02:50:22,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5459183673469388 [2022-11-23 02:50:22,983 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 321 transitions. [2022-11-23 02:50:22,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 321 transitions. [2022-11-23 02:50:22,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:22,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 321 transitions. [2022-11-23 02:50:22,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,987 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,988 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 80 flow. Second operand 4 states and 321 transitions. [2022-11-23 02:50:22,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 160 flow [2022-11-23 02:50:22,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:50:22,989 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 74 flow [2022-11-23 02:50:22,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2022-11-23 02:50:22,990 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2022-11-23 02:50:22,991 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 74 flow [2022-11-23 02:50:22,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:22,991 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:50:23,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 02:50:23,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:23,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:23,193 INFO L85 PathProgramCache]: Analyzing trace with hash 343548802, now seen corresponding path program 1 times [2022-11-23 02:50:23,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:23,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13859721] [2022-11-23 02:50:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:23,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:23,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13859721] [2022-11-23 02:50:23,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13859721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022363830] [2022-11-23 02:50:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:23,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:23,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:23,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:23,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:50:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:50:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:23,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:23,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022363830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:23,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:23,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 02:50:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919130628] [2022-11-23 02:50:23,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:50:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:50:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:50:23,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-23 02:50:23,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:23,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:23,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-23 02:50:23,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:23,728 INFO L130 PetriNetUnfolder]: 567/877 cut-off events. [2022-11-23 02:50:23,728 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-23 02:50:23,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 877 events. 567/877 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 4315 event pairs, 80 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 1767. Up to 517 conditions per place. [2022-11-23 02:50:23,740 INFO L137 encePairwiseOnDemand]: 144/147 looper letters, 60 selfloop transitions, 5 changer transitions 3/69 dead transitions. [2022-11-23 02:50:23,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 69 transitions, 356 flow [2022-11-23 02:50:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:50:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:50:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 504 transitions. [2022-11-23 02:50:23,746 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2022-11-23 02:50:23,746 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 504 transitions. [2022-11-23 02:50:23,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 504 transitions. [2022-11-23 02:50:23,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:23,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 504 transitions. [2022-11-23 02:50:23,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:23,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:23,754 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:23,754 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 74 flow. Second operand 6 states and 504 transitions. [2022-11-23 02:50:23,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 69 transitions, 356 flow [2022-11-23 02:50:23,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 69 transitions, 353 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:50:23,758 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 101 flow [2022-11-23 02:50:23,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2022-11-23 02:50:23,760 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2022-11-23 02:50:23,760 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 101 flow [2022-11-23 02:50:23,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:23,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:23,762 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:50:23,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:23,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:23,977 INFO L85 PathProgramCache]: Analyzing trace with hash 343548778, now seen corresponding path program 1 times [2022-11-23 02:50:23,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:23,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702511077] [2022-11-23 02:50:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:23,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:24,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:24,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702511077] [2022-11-23 02:50:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702511077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339546034] [2022-11-23 02:50:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:24,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:24,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:24,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:24,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:50:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:50:24,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:24,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:24,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339546034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:24,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:24,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-23 02:50:24,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623477944] [2022-11-23 02:50:24,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:24,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:50:24,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:24,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:50:24,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:50:24,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-23 02:50:24,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 101 flow. Second operand has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:24,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:24,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-23 02:50:24,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:24,470 INFO L130 PetriNetUnfolder]: 681/1169 cut-off events. [2022-11-23 02:50:24,470 INFO L131 PetriNetUnfolder]: For 412/412 co-relation queries the response was YES. [2022-11-23 02:50:24,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3307 conditions, 1169 events. 681/1169 cut-off events. For 412/412 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6289 event pairs, 89 based on Foata normal form. 72/1023 useless extension candidates. Maximal degree in co-relation 3068. Up to 579 conditions per place. [2022-11-23 02:50:24,478 INFO L137 encePairwiseOnDemand]: 138/147 looper letters, 50 selfloop transitions, 29 changer transitions 0/81 dead transitions. [2022-11-23 02:50:24,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 81 transitions, 494 flow [2022-11-23 02:50:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:50:24,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:50:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 596 transitions. [2022-11-23 02:50:24,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5792031098153547 [2022-11-23 02:50:24,481 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 596 transitions. [2022-11-23 02:50:24,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 596 transitions. [2022-11-23 02:50:24,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:24,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 596 transitions. [2022-11-23 02:50:24,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:24,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:24,487 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:24,487 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 101 flow. Second operand 7 states and 596 transitions. [2022-11-23 02:50:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 81 transitions, 494 flow [2022-11-23 02:50:24,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 81 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:50:24,491 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 401 flow [2022-11-23 02:50:24,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=401, PETRI_PLACES=42, PETRI_TRANSITIONS=46} [2022-11-23 02:50:24,492 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2022-11-23 02:50:24,493 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 401 flow [2022-11-23 02:50:24,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:24,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:24,494 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:50:24,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:24,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:24,704 INFO L85 PathProgramCache]: Analyzing trace with hash 343548777, now seen corresponding path program 1 times [2022-11-23 02:50:24,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:24,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858016080] [2022-11-23 02:50:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:24,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:24,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858016080] [2022-11-23 02:50:24,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858016080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:24,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682686259] [2022-11-23 02:50:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:24,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:24,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:24,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:50:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:50:24,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:24,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:50:24,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682686259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:50:24,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:50:24,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-23 02:50:24,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113398869] [2022-11-23 02:50:24,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:50:24,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:50:24,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:24,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:50:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:50:24,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-23 02:50:24,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 401 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:24,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:24,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-23 02:50:24,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:25,068 INFO L130 PetriNetUnfolder]: 737/1283 cut-off events. [2022-11-23 02:50:25,068 INFO L131 PetriNetUnfolder]: For 2401/2401 co-relation queries the response was YES. [2022-11-23 02:50:25,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 1283 events. 737/1283 cut-off events. For 2401/2401 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7078 event pairs, 129 based on Foata normal form. 118/1169 useless extension candidates. Maximal degree in co-relation 5177. Up to 642 conditions per place. [2022-11-23 02:50:25,078 INFO L137 encePairwiseOnDemand]: 138/147 looper letters, 34 selfloop transitions, 24 changer transitions 0/60 dead transitions. [2022-11-23 02:50:25,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 632 flow [2022-11-23 02:50:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:50:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:50:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2022-11-23 02:50:25,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2022-11-23 02:50:25,081 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 324 transitions. [2022-11-23 02:50:25,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 324 transitions. [2022-11-23 02:50:25,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:25,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 324 transitions. [2022-11-23 02:50:25,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,084 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,084 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 401 flow. Second operand 4 states and 324 transitions. [2022-11-23 02:50:25,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 632 flow [2022-11-23 02:50:25,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 564 flow, removed 34 selfloop flow, removed 1 redundant places. [2022-11-23 02:50:25,102 INFO L231 Difference]: Finished difference. Result has 44 places, 53 transitions, 548 flow [2022-11-23 02:50:25,102 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=548, PETRI_PLACES=44, PETRI_TRANSITIONS=53} [2022-11-23 02:50:25,105 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2022-11-23 02:50:25,105 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 53 transitions, 548 flow [2022-11-23 02:50:25,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,108 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:25,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:25,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:25,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:25,320 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1992099323, now seen corresponding path program 1 times [2022-11-23 02:50:25,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:25,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107190397] [2022-11-23 02:50:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:25,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:25,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:25,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107190397] [2022-11-23 02:50:25,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107190397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:50:25,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:50:25,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:50:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128352164] [2022-11-23 02:50:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:50:25,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:50:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:50:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:50:25,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-23 02:50:25,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 53 transitions, 548 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:25,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-23 02:50:25,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:25,610 INFO L130 PetriNetUnfolder]: 725/1293 cut-off events. [2022-11-23 02:50:25,610 INFO L131 PetriNetUnfolder]: For 3067/3067 co-relation queries the response was YES. [2022-11-23 02:50:25,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5552 conditions, 1293 events. 725/1293 cut-off events. For 3067/3067 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6996 event pairs, 375 based on Foata normal form. 0/1089 useless extension candidates. Maximal degree in co-relation 5380. Up to 1109 conditions per place. [2022-11-23 02:50:25,620 INFO L137 encePairwiseOnDemand]: 143/147 looper letters, 64 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2022-11-23 02:50:25,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 69 transitions, 820 flow [2022-11-23 02:50:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:50:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:50:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2022-11-23 02:50:25,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2022-11-23 02:50:25,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2022-11-23 02:50:25,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2022-11-23 02:50:25,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:25,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2022-11-23 02:50:25,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,626 INFO L175 Difference]: Start difference. First operand has 44 places, 53 transitions, 548 flow. Second operand 3 states and 245 transitions. [2022-11-23 02:50:25,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 69 transitions, 820 flow [2022-11-23 02:50:25,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 69 transitions, 747 flow, removed 36 selfloop flow, removed 1 redundant places. [2022-11-23 02:50:25,638 INFO L231 Difference]: Finished difference. Result has 46 places, 56 transitions, 553 flow [2022-11-23 02:50:25,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=553, PETRI_PLACES=46, PETRI_TRANSITIONS=56} [2022-11-23 02:50:25,639 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2022-11-23 02:50:25,639 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 56 transitions, 553 flow [2022-11-23 02:50:25,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:25,640 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-11-23 02:50:25,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 02:50:25,640 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash -244200573, now seen corresponding path program 2 times [2022-11-23 02:50:25,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:25,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683432727] [2022-11-23 02:50:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:25,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:25,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:25,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683432727] [2022-11-23 02:50:25,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683432727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695648875] [2022-11-23 02:50:25,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:50:25,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:25,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:25,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:50:25,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:50:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:50:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:25,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:25,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695648875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:25,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:25,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 02:50:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516803340] [2022-11-23 02:50:25,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:25,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:50:25,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:25,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:50:25,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 02:50:25,981 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-23 02:50:25,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 56 transitions, 553 flow. Second operand has 13 states, 13 states have (on average 74.3076923076923) internal successors, (966), 13 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:25,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:25,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-23 02:50:25,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:26,714 INFO L130 PetriNetUnfolder]: 1801/3195 cut-off events. [2022-11-23 02:50:26,714 INFO L131 PetriNetUnfolder]: For 8298/8372 co-relation queries the response was YES. [2022-11-23 02:50:26,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12713 conditions, 3195 events. 1801/3195 cut-off events. For 8298/8372 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20631 event pairs, 203 based on Foata normal form. 456/2949 useless extension candidates. Maximal degree in co-relation 12270. Up to 831 conditions per place. [2022-11-23 02:50:26,737 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 100 selfloop transitions, 132 changer transitions 0/234 dead transitions. [2022-11-23 02:50:26,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 234 transitions, 2260 flow [2022-11-23 02:50:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:50:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:50:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1032 transitions. [2022-11-23 02:50:26,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2022-11-23 02:50:26,742 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1032 transitions. [2022-11-23 02:50:26,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1032 transitions. [2022-11-23 02:50:26,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:26,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1032 transitions. [2022-11-23 02:50:26,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.0) internal successors, (1032), 12 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:26,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 147.0) internal successors, (1911), 13 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:26,749 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 147.0) internal successors, (1911), 13 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:26,750 INFO L175 Difference]: Start difference. First operand has 46 places, 56 transitions, 553 flow. Second operand 12 states and 1032 transitions. [2022-11-23 02:50:26,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 234 transitions, 2260 flow [2022-11-23 02:50:26,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 234 transitions, 2249 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:50:26,766 INFO L231 Difference]: Finished difference. Result has 66 places, 164 transitions, 2244 flow [2022-11-23 02:50:26,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2244, PETRI_PLACES=66, PETRI_TRANSITIONS=164} [2022-11-23 02:50:26,767 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2022-11-23 02:50:26,768 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 164 transitions, 2244 flow [2022-11-23 02:50:26,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.3076923076923) internal successors, (966), 13 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:26,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:26,769 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-11-23 02:50:26,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:26,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:26,974 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:26,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:26,975 INFO L85 PathProgramCache]: Analyzing trace with hash -244200549, now seen corresponding path program 2 times [2022-11-23 02:50:26,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:26,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394203001] [2022-11-23 02:50:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:27,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:27,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394203001] [2022-11-23 02:50:27,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394203001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:27,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113183603] [2022-11-23 02:50:27,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:50:27,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:27,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:27,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:27,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:50:27,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 02:50:27,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:50:27,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 02:50:27,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:50:27,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113183603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:50:27,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:50:27,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-11-23 02:50:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410696691] [2022-11-23 02:50:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:50:27,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:50:27,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:50:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:50:27,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-23 02:50:27,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 164 transitions, 2244 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:27,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:27,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-23 02:50:27,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:27,576 INFO L130 PetriNetUnfolder]: 1147/2065 cut-off events. [2022-11-23 02:50:27,576 INFO L131 PetriNetUnfolder]: For 10177/10240 co-relation queries the response was YES. [2022-11-23 02:50:27,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9440 conditions, 2065 events. 1147/2065 cut-off events. For 10177/10240 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12437 event pairs, 775 based on Foata normal form. 112/1968 useless extension candidates. Maximal degree in co-relation 9282. Up to 2060 conditions per place. [2022-11-23 02:50:27,594 INFO L137 encePairwiseOnDemand]: 144/147 looper letters, 111 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2022-11-23 02:50:27,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 114 transitions, 1788 flow [2022-11-23 02:50:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:50:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:50:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2022-11-23 02:50:27,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5260770975056689 [2022-11-23 02:50:27,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2022-11-23 02:50:27,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2022-11-23 02:50:27,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:27,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2022-11-23 02:50:27,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:27,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:27,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:27,599 INFO L175 Difference]: Start difference. First operand has 66 places, 164 transitions, 2244 flow. Second operand 3 states and 232 transitions. [2022-11-23 02:50:27,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 114 transitions, 1788 flow [2022-11-23 02:50:27,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 114 transitions, 1574 flow, removed 95 selfloop flow, removed 3 redundant places. [2022-11-23 02:50:27,644 INFO L231 Difference]: Finished difference. Result has 63 places, 114 transitions, 1352 flow [2022-11-23 02:50:27,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1352, PETRI_PLACES=63, PETRI_TRANSITIONS=114} [2022-11-23 02:50:27,646 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2022-11-23 02:50:27,647 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 114 transitions, 1352 flow [2022-11-23 02:50:27,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:27,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:27,647 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:27,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:27,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:27,854 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:27,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1496463677, now seen corresponding path program 1 times [2022-11-23 02:50:27,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:27,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412464166] [2022-11-23 02:50:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:27,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:27,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412464166] [2022-11-23 02:50:27,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412464166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913309576] [2022-11-23 02:50:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:27,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:27,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:27,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:27,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:50:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:28,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:50:28,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:28,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:50:28,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913309576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:50:28,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:50:28,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-23 02:50:28,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052116881] [2022-11-23 02:50:28,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:50:28,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:50:28,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:28,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:50:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:50:28,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-23 02:50:28,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 114 transitions, 1352 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:28,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:28,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-23 02:50:28,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:28,369 INFO L130 PetriNetUnfolder]: 964/1732 cut-off events. [2022-11-23 02:50:28,370 INFO L131 PetriNetUnfolder]: For 7277/7277 co-relation queries the response was YES. [2022-11-23 02:50:28,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6711 conditions, 1732 events. 964/1732 cut-off events. For 7277/7277 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9586 event pairs, 236 based on Foata normal form. 0/1732 useless extension candidates. Maximal degree in co-relation 6681. Up to 1209 conditions per place. [2022-11-23 02:50:28,390 INFO L137 encePairwiseOnDemand]: 144/147 looper letters, 110 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2022-11-23 02:50:28,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 122 transitions, 1595 flow [2022-11-23 02:50:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:50:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:50:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2022-11-23 02:50:28,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2022-11-23 02:50:28,393 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 318 transitions. [2022-11-23 02:50:28,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 318 transitions. [2022-11-23 02:50:28,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:28,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 318 transitions. [2022-11-23 02:50:28,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:28,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:28,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:28,396 INFO L175 Difference]: Start difference. First operand has 63 places, 114 transitions, 1352 flow. Second operand 4 states and 318 transitions. [2022-11-23 02:50:28,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 122 transitions, 1595 flow [2022-11-23 02:50:28,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 1584 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-23 02:50:28,426 INFO L231 Difference]: Finished difference. Result has 64 places, 92 transitions, 1107 flow [2022-11-23 02:50:28,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1107, PETRI_PLACES=64, PETRI_TRANSITIONS=92} [2022-11-23 02:50:28,427 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2022-11-23 02:50:28,428 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 92 transitions, 1107 flow [2022-11-23 02:50:28,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:28,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:28,428 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-11-23 02:50:28,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:28,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 02:50:28,645 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1922691619, now seen corresponding path program 3 times [2022-11-23 02:50:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:28,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178391109] [2022-11-23 02:50:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:28,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:28,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178391109] [2022-11-23 02:50:28,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178391109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826874744] [2022-11-23 02:50:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:50:28,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:28,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:28,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:28,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:50:28,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 02:50:28,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:28,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:50:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:29,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:29,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826874744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:29,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:29,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-23 02:50:29,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060298007] [2022-11-23 02:50:29,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:29,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:50:29,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:29,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:50:29,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:50:29,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-23 02:50:29,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 92 transitions, 1107 flow. Second operand has 25 states, 25 states have (on average 74.16) internal successors, (1854), 25 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:29,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:29,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-23 02:50:29,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:30,377 INFO L130 PetriNetUnfolder]: 2397/4263 cut-off events. [2022-11-23 02:50:30,377 INFO L131 PetriNetUnfolder]: For 59091/59225 co-relation queries the response was YES. [2022-11-23 02:50:30,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15491 conditions, 4263 events. 2397/4263 cut-off events. For 59091/59225 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 25542 event pairs, 315 based on Foata normal form. 700/4961 useless extension candidates. Maximal degree in co-relation 15461. Up to 876 conditions per place. [2022-11-23 02:50:30,406 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 108 selfloop transitions, 242 changer transitions 66/418 dead transitions. [2022-11-23 02:50:30,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 418 transitions, 4044 flow [2022-11-23 02:50:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 02:50:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 02:50:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2007 transitions. [2022-11-23 02:50:30,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5688775510204082 [2022-11-23 02:50:30,413 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2007 transitions. [2022-11-23 02:50:30,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2007 transitions. [2022-11-23 02:50:30,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:30,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2007 transitions. [2022-11-23 02:50:30,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.625) internal successors, (2007), 24 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:30,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 147.0) internal successors, (3675), 25 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:30,427 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 147.0) internal successors, (3675), 25 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:30,427 INFO L175 Difference]: Start difference. First operand has 64 places, 92 transitions, 1107 flow. Second operand 24 states and 2007 transitions. [2022-11-23 02:50:30,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 418 transitions, 4044 flow [2022-11-23 02:50:30,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 418 transitions, 4020 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:50:30,466 INFO L231 Difference]: Finished difference. Result has 107 places, 264 transitions, 3960 flow [2022-11-23 02:50:30,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3960, PETRI_PLACES=107, PETRI_TRANSITIONS=264} [2022-11-23 02:50:30,467 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 81 predicate places. [2022-11-23 02:50:30,468 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 264 transitions, 3960 flow [2022-11-23 02:50:30,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.16) internal successors, (1854), 25 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:30,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:30,469 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2022-11-23 02:50:30,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:30,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:50:30,680 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1014355811, now seen corresponding path program 4 times [2022-11-23 02:50:30,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:30,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193848485] [2022-11-23 02:50:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:30,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:31,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193848485] [2022-11-23 02:50:31,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193848485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833765458] [2022-11-23 02:50:31,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:50:31,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:31,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:31,256 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:31,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:50:31,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:50:31,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:31,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 02:50:31,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:31,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:32,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833765458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:32,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:32,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-11-23 02:50:32,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305318754] [2022-11-23 02:50:32,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 02:50:32,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 02:50:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-23 02:50:32,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-23 02:50:32,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 264 transitions, 3960 flow. Second operand has 49 states, 49 states have (on average 74.08163265306122) internal successors, (3630), 49 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:32,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:32,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-23 02:50:32,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:36,960 INFO L130 PetriNetUnfolder]: 7809/13767 cut-off events. [2022-11-23 02:50:36,960 INFO L131 PetriNetUnfolder]: For 728963/729241 co-relation queries the response was YES. [2022-11-23 02:50:37,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58034 conditions, 13767 events. 7809/13767 cut-off events. For 728963/729241 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 90594 event pairs, 939 based on Foata normal form. 1468/15233 useless extension candidates. Maximal degree in co-relation 57981. Up to 3987 conditions per place. [2022-11-23 02:50:37,225 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 204 selfloop transitions, 882 changer transitions 138/1226 dead transitions. [2022-11-23 02:50:37,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 1226 transitions, 15837 flow [2022-11-23 02:50:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 02:50:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-23 02:50:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4023 transitions. [2022-11-23 02:50:37,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5701530612244898 [2022-11-23 02:50:37,240 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4023 transitions. [2022-11-23 02:50:37,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4023 transitions. [2022-11-23 02:50:37,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:37,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4023 transitions. [2022-11-23 02:50:37,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 83.8125) internal successors, (4023), 48 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:37,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 147.0) internal successors, (7203), 49 states have internal predecessors, (7203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:37,268 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 147.0) internal successors, (7203), 49 states have internal predecessors, (7203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:37,268 INFO L175 Difference]: Start difference. First operand has 107 places, 264 transitions, 3960 flow. Second operand 48 states and 4023 transitions. [2022-11-23 02:50:37,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 1226 transitions, 15837 flow [2022-11-23 02:50:37,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 1226 transitions, 12945 flow, removed 1397 selfloop flow, removed 5 redundant places. [2022-11-23 02:50:37,770 INFO L231 Difference]: Finished difference. Result has 195 places, 904 transitions, 13613 flow [2022-11-23 02:50:37,771 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=13613, PETRI_PLACES=195, PETRI_TRANSITIONS=904} [2022-11-23 02:50:37,772 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 169 predicate places. [2022-11-23 02:50:37,772 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 904 transitions, 13613 flow [2022-11-23 02:50:37,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 74.08163265306122) internal successors, (3630), 49 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:37,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:37,774 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2022-11-23 02:50:37,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:37,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 02:50:37,985 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:50:37,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:37,986 INFO L85 PathProgramCache]: Analyzing trace with hash -718011933, now seen corresponding path program 5 times [2022-11-23 02:50:37,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:37,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702684348] [2022-11-23 02:50:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:37,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:40,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:40,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702684348] [2022-11-23 02:50:40,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702684348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:40,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462731035] [2022-11-23 02:50:40,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:50:40,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:40,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:40,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:50:40,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-23 02:50:40,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:40,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 02:50:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:40,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:43,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462731035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:43,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:43,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2022-11-23 02:50:43,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814283129] [2022-11-23 02:50:43,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:43,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-23 02:50:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-23 02:50:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-23 02:50:43,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-23 02:50:43,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 904 transitions, 13613 flow. Second operand has 97 states, 97 states have (on average 74.04123711340206) internal successors, (7182), 97 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:43,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:43,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-23 02:50:43,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:51:07,895 INFO L130 PetriNetUnfolder]: 27909/48999 cut-off events. [2022-11-23 02:51:07,895 INFO L131 PetriNetUnfolder]: For 6912627/6913193 co-relation queries the response was YES. [2022-11-23 02:51:08,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207445 conditions, 48999 events. 27909/48999 cut-off events. For 6912627/6913193 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 359446 event pairs, 3339 based on Foata normal form. 3004/52001 useless extension candidates. Maximal degree in co-relation 207349. Up to 13803 conditions per place. [2022-11-23 02:51:08,732 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 396 selfloop transitions, 3322 changer transitions 282/4002 dead transitions. [2022-11-23 02:51:08,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 4002 transitions, 56710 flow [2022-11-23 02:51:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-23 02:51:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-23 02:51:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8055 transitions. [2022-11-23 02:51:08,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5707908163265306 [2022-11-23 02:51:08,753 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8055 transitions. [2022-11-23 02:51:08,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8055 transitions. [2022-11-23 02:51:08,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:51:08,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8055 transitions. [2022-11-23 02:51:08,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 83.90625) internal successors, (8055), 96 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:08,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 147.0) internal successors, (14259), 97 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:08,820 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 147.0) internal successors, (14259), 97 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:08,821 INFO L175 Difference]: Start difference. First operand has 195 places, 904 transitions, 13613 flow. Second operand 96 states and 8055 transitions. [2022-11-23 02:51:08,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 4002 transitions, 56710 flow [2022-11-23 02:51:13,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 4002 transitions, 45494 flow, removed 5417 selfloop flow, removed 11 redundant places. [2022-11-23 02:51:13,122 INFO L231 Difference]: Finished difference. Result has 373 places, 3344 transitions, 49938 flow [2022-11-23 02:51:13,123 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=12379, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=49938, PETRI_PLACES=373, PETRI_TRANSITIONS=3344} [2022-11-23 02:51:13,124 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 347 predicate places. [2022-11-23 02:51:13,124 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 3344 transitions, 49938 flow [2022-11-23 02:51:13,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 74.04123711340206) internal successors, (7182), 97 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:13,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:51:13,127 INFO L209 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2022-11-23 02:51:13,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:51:13,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:13,332 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-23 02:51:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:51:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash -712386845, now seen corresponding path program 6 times [2022-11-23 02:51:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:51:13,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552540837] [2022-11-23 02:51:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:51:13,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:51:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:51:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:51:19,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:51:19,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552540837] [2022-11-23 02:51:19,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552540837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:51:19,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473863710] [2022-11-23 02:51:19,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:51:19,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:19,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:51:19,672 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:51:19,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18fb720-10ea-47a6-b563-de91e045f634/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:51:20,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2022-11-23 02:51:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:51:20,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-23 02:51:20,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:51:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:51:20,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:51:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:51:31,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473863710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:51:31,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:51:31,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2022-11-23 02:51:31,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041138676] [2022-11-23 02:51:31,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:51:31,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-23 02:51:31,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:51:31,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-23 02:51:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-23 02:51:32,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-23 02:51:32,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 3344 transitions, 49938 flow. Second operand has 193 states, 193 states have (on average 74.02072538860104) internal successors, (14286), 193 states have internal predecessors, (14286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:32,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:51:32,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-23 02:51:32,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand