./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b 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_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN --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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- 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-6b4ec56 [2022-11-20 10:34:11,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:34:11,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:34:11,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:34:11,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:34:11,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:34:11,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:34:11,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:34:11,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:34:11,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:34:11,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:34:11,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:34:11,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:34:11,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:34:11,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:34:11,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:34:11,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:34:11,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:34:11,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:34:11,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:34:11,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:34:11,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:34:11,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:34:11,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:34:11,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:34:11,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:34:11,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:34:11,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:34:11,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:34:11,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:34:11,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:34:11,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:34:11,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:34:11,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:34:11,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:34:11,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:34:11,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:34:11,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:34:11,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:34:11,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:34:11,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:34:11,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 10:34:12,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:34:12,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:34:12,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:34:12,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:34:12,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:34:12,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:34:12,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:34:12,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:34:12,046 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:34:12,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:34:12,046 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:34:12,047 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:34:12,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:34:12,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:34:12,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:34:12,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:34:12,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:34:12,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:34:12,048 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 10:34:12,049 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:34:12,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:34:12,049 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:34:12,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:34:12,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:34:12,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:34:12,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:34:12,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:34:12,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:34:12,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:34:12,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:34:12,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:34:12,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:34:12,052 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:34:12,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:34:12,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:34:12,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-11-20 10:34:12,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:34:12,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:34:12,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:34:12,347 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:34:12,348 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:34:12,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-20 10:34:15,677 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:34:15,887 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:34:15,888 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-20 10:34:15,895 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/data/2aee3f174/5e3546937da54345afb302bdb918a27d/FLAG169725017 [2022-11-20 10:34:15,910 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/data/2aee3f174/5e3546937da54345afb302bdb918a27d [2022-11-20 10:34:15,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:34:15,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:34:15,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:34:15,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:34:15,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:34:15,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:34:15" (1/1) ... [2022-11-20 10:34:15,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22eb2d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:15, skipping insertion in model container [2022-11-20 10:34:15,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:34:15" (1/1) ... [2022-11-20 10:34:15,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:34:15,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:34:16,132 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_6a336d82-5384-469d-9775-f2e8b4a6f97f/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-20 10:34:16,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:34:16,141 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:34:16,159 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_6a336d82-5384-469d-9775-f2e8b4a6f97f/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-20 10:34:16,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:34:16,174 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:34:16,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16 WrapperNode [2022-11-20 10:34:16,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:34:16,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:34:16,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:34:16,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:34:16,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,208 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-20 10:34:16,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:34:16,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:34:16,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:34:16,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:34:16,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:34:16,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:34:16,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:34:16,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:34:16,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (1/1) ... [2022-11-20 10:34:16,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:34:16,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:16,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:34:16,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:34:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:34:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:34:16,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:34:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:34:16,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:34:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:34:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:34:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:34:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:34:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:34:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:34:16,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:34:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:34:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:34:16,334 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:34:16,428 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:34:16,431 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:34:16,628 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:34:16,754 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:34:16,755 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:34:16,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:34:16 BoogieIcfgContainer [2022-11-20 10:34:16,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:34:16,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:34:16,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:34:16,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:34:16,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:34:15" (1/3) ... [2022-11-20 10:34:16,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f9acb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:34:16, skipping insertion in model container [2022-11-20 10:34:16,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:16" (2/3) ... [2022-11-20 10:34:16,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f9acb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:34:16, skipping insertion in model container [2022-11-20 10:34:16,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:34:16" (3/3) ... [2022-11-20 10:34:16,767 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-11-20 10:34:16,775 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:34:16,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:34:16,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-20 10:34:16,787 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:34:16,879 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:34:16,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 198 flow [2022-11-20 10:34:16,999 INFO L130 PetriNetUnfolder]: 6/89 cut-off events. [2022-11-20 10:34:16,999 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:34:17,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 87 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2022-11-20 10:34:17,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 198 flow [2022-11-20 10:34:17,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 70 transitions, 149 flow [2022-11-20 10:34:17,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:34:17,027 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;@3e06c567, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:34:17,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-20 10:34:17,042 INFO L130 PetriNetUnfolder]: 2/38 cut-off events. [2022-11-20 10:34:17,042 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:34:17,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:17,043 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:17,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:17,049 INFO L85 PathProgramCache]: Analyzing trace with hash -770060062, now seen corresponding path program 1 times [2022-11-20 10:34:17,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:17,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640270438] [2022-11-20 10:34:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:17,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:17,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640270438] [2022-11-20 10:34:17,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640270438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:17,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:17,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:34:17,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647302234] [2022-11-20 10:34:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:17,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:34:17,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:34:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:34:17,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-20 10:34:17,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:17,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:17,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-20 10:34:17,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:17,719 INFO L130 PetriNetUnfolder]: 39/159 cut-off events. [2022-11-20 10:34:17,719 INFO L131 PetriNetUnfolder]: For 24/25 co-relation queries the response was YES. [2022-11-20 10:34:17,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 159 events. 39/159 cut-off events. For 24/25 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 474 event pairs, 12 based on Foata normal form. 17/118 useless extension candidates. Maximal degree in co-relation 168. Up to 61 conditions per place. [2022-11-20 10:34:17,724 INFO L137 encePairwiseOnDemand]: 80/91 looper letters, 12 selfloop transitions, 2 changer transitions 2/70 dead transitions. [2022-11-20 10:34:17,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 185 flow [2022-11-20 10:34:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:34:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:34:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2022-11-20 10:34:17,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8901098901098901 [2022-11-20 10:34:17,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2022-11-20 10:34:17,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2022-11-20 10:34:17,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:17,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2022-11-20 10:34:17,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:17,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:17,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:17,753 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 149 flow. Second operand 3 states and 243 transitions. [2022-11-20 10:34:17,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 185 flow [2022-11-20 10:34:17,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 177 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:34:17,760 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 154 flow [2022-11-20 10:34:17,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2022-11-20 10:34:17,766 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2022-11-20 10:34:17,766 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 154 flow [2022-11-20 10:34:17,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:17,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:17,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:34:17,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1293334427, now seen corresponding path program 1 times [2022-11-20 10:34:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262779550] [2022-11-20 10:34:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:17,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:17,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262779550] [2022-11-20 10:34:17,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262779550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:17,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:17,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:17,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166277767] [2022-11-20 10:34:17,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:17,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:17,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 91 [2022-11-20 10:34:17,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:17,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:17,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 91 [2022-11-20 10:34:17,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:18,190 INFO L130 PetriNetUnfolder]: 173/393 cut-off events. [2022-11-20 10:34:18,191 INFO L131 PetriNetUnfolder]: For 40/48 co-relation queries the response was YES. [2022-11-20 10:34:18,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 393 events. 173/393 cut-off events. For 40/48 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1879 event pairs, 17 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 677. Up to 203 conditions per place. [2022-11-20 10:34:18,196 INFO L137 encePairwiseOnDemand]: 85/91 looper letters, 38 selfloop transitions, 4 changer transitions 2/89 dead transitions. [2022-11-20 10:34:18,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 313 flow [2022-11-20 10:34:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:34:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:34:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 366 transitions. [2022-11-20 10:34:18,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8043956043956044 [2022-11-20 10:34:18,201 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 366 transitions. [2022-11-20 10:34:18,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 366 transitions. [2022-11-20 10:34:18,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:18,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 366 transitions. [2022-11-20 10:34:18,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,207 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,207 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 154 flow. Second operand 5 states and 366 transitions. [2022-11-20 10:34:18,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 313 flow [2022-11-20 10:34:18,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:34:18,211 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 182 flow [2022-11-20 10:34:18,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2022-11-20 10:34:18,213 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2022-11-20 10:34:18,213 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 182 flow [2022-11-20 10:34:18,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:18,214 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:18,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:34:18,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1354154245, now seen corresponding path program 1 times [2022-11-20 10:34:18,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:18,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638635283] [2022-11-20 10:34:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:18,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:18,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638635283] [2022-11-20 10:34:18,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638635283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:18,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908080385] [2022-11-20 10:34:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:18,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:18,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:18,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:18,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:34:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:34:18,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:18,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:18,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908080385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:18,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:18,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 10:34:18,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839632451] [2022-11-20 10:34:18,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:18,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:34:18,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:34:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:34:18,655 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-20 10:34:18,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:18,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-20 10:34:18,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:18,893 INFO L130 PetriNetUnfolder]: 95/446 cut-off events. [2022-11-20 10:34:18,893 INFO L131 PetriNetUnfolder]: For 69/87 co-relation queries the response was YES. [2022-11-20 10:34:18,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 446 events. 95/446 cut-off events. For 69/87 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2297 event pairs, 5 based on Foata normal form. 5/360 useless extension candidates. Maximal degree in co-relation 721. Up to 101 conditions per place. [2022-11-20 10:34:18,904 INFO L137 encePairwiseOnDemand]: 83/91 looper letters, 24 selfloop transitions, 17 changer transitions 1/99 dead transitions. [2022-11-20 10:34:18,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 371 flow [2022-11-20 10:34:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:34:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:34:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 557 transitions. [2022-11-20 10:34:18,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8744113029827315 [2022-11-20 10:34:18,909 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 557 transitions. [2022-11-20 10:34:18,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 557 transitions. [2022-11-20 10:34:18,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:18,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 557 transitions. [2022-11-20 10:34:18,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.57142857142857) internal successors, (557), 7 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,918 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,919 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 182 flow. Second operand 7 states and 557 transitions. [2022-11-20 10:34:18,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 371 flow [2022-11-20 10:34:18,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:34:18,931 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 339 flow [2022-11-20 10:34:18,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2022-11-20 10:34:18,934 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2022-11-20 10:34:18,935 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 339 flow [2022-11-20 10:34:18,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:18,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:18,936 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:18,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 10:34:19,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:19,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1354154246, now seen corresponding path program 1 times [2022-11-20 10:34:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:19,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553710075] [2022-11-20 10:34:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:19,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:19,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:19,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553710075] [2022-11-20 10:34:19,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553710075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:19,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704492276] [2022-11-20 10:34:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:19,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:19,271 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:19,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:34:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:19,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:34:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:19,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:19,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704492276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:19,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:34:19,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-20 10:34:19,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69205271] [2022-11-20 10:34:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:19,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:19,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:19,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-20 10:34:19,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:19,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-20 10:34:19,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:19,597 INFO L130 PetriNetUnfolder]: 93/503 cut-off events. [2022-11-20 10:34:19,597 INFO L131 PetriNetUnfolder]: For 923/1194 co-relation queries the response was YES. [2022-11-20 10:34:19,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 503 events. 93/503 cut-off events. For 923/1194 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2788 event pairs, 2 based on Foata normal form. 39/472 useless extension candidates. Maximal degree in co-relation 1049. Up to 100 conditions per place. [2022-11-20 10:34:19,603 INFO L137 encePairwiseOnDemand]: 83/91 looper letters, 14 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2022-11-20 10:34:19,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 437 flow [2022-11-20 10:34:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:34:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:34:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 308 transitions. [2022-11-20 10:34:19,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2022-11-20 10:34:19,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 308 transitions. [2022-11-20 10:34:19,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 308 transitions. [2022-11-20 10:34:19,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:19,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 308 transitions. [2022-11-20 10:34:19,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,608 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,608 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 339 flow. Second operand 4 states and 308 transitions. [2022-11-20 10:34:19,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 437 flow [2022-11-20 10:34:19,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 423 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-20 10:34:19,615 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 435 flow [2022-11-20 10:34:19,615 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2022-11-20 10:34:19,616 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2022-11-20 10:34:19,616 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 435 flow [2022-11-20 10:34:19,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:19,617 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:19,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:19,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:19,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash 175227428, now seen corresponding path program 1 times [2022-11-20 10:34:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:19,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797932049] [2022-11-20 10:34:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:19,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797932049] [2022-11-20 10:34:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797932049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:19,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:19,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:34:19,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218431415] [2022-11-20 10:34:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:19,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:34:19,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:34:19,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:34:19,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 91 [2022-11-20 10:34:19,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:19,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 91 [2022-11-20 10:34:19,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:20,053 INFO L130 PetriNetUnfolder]: 143/660 cut-off events. [2022-11-20 10:34:20,054 INFO L131 PetriNetUnfolder]: For 2054/2511 co-relation queries the response was YES. [2022-11-20 10:34:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 660 events. 143/660 cut-off events. For 2054/2511 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4217 event pairs, 44 based on Foata normal form. 17/535 useless extension candidates. Maximal degree in co-relation 1580. Up to 221 conditions per place. [2022-11-20 10:34:20,060 INFO L137 encePairwiseOnDemand]: 87/91 looper letters, 40 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2022-11-20 10:34:20,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 641 flow [2022-11-20 10:34:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:34:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:34:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2022-11-20 10:34:20,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2022-11-20 10:34:20,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2022-11-20 10:34:20,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2022-11-20 10:34:20,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:20,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2022-11-20 10:34:20,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:20,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:20,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:20,064 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 435 flow. Second operand 3 states and 234 transitions. [2022-11-20 10:34:20,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 641 flow [2022-11-20 10:34:20,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 580 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-11-20 10:34:20,078 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 461 flow [2022-11-20 10:34:20,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=461, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2022-11-20 10:34:20,081 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 20 predicate places. [2022-11-20 10:34:20,083 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 461 flow [2022-11-20 10:34:20,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:20,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:20,083 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:20,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:34:20,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:20,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:20,085 INFO L85 PathProgramCache]: Analyzing trace with hash -32851000, now seen corresponding path program 1 times [2022-11-20 10:34:20,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:20,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064139562] [2022-11-20 10:34:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:20,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:20,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:20,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064139562] [2022-11-20 10:34:20,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064139562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:20,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955466065] [2022-11-20 10:34:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:20,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:20,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:20,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:20,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:34:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:34:20,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:20,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:20,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955466065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:20,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:20,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 10:34:20,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292600077] [2022-11-20 10:34:20,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:20,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:34:20,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:20,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:34:20,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:34:20,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 91 [2022-11-20 10:34:20,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 461 flow. Second operand has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:20,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:20,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 91 [2022-11-20 10:34:20,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:21,121 INFO L130 PetriNetUnfolder]: 730/1877 cut-off events. [2022-11-20 10:34:21,121 INFO L131 PetriNetUnfolder]: For 5158/5214 co-relation queries the response was YES. [2022-11-20 10:34:21,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6984 conditions, 1877 events. 730/1877 cut-off events. For 5158/5214 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12657 event pairs, 34 based on Foata normal form. 110/1637 useless extension candidates. Maximal degree in co-relation 6603. Up to 633 conditions per place. [2022-11-20 10:34:21,140 INFO L137 encePairwiseOnDemand]: 84/91 looper letters, 270 selfloop transitions, 18 changer transitions 2/335 dead transitions. [2022-11-20 10:34:21,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 335 transitions, 3332 flow [2022-11-20 10:34:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:34:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:34:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1281 transitions. [2022-11-20 10:34:21,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.782051282051282 [2022-11-20 10:34:21,145 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1281 transitions. [2022-11-20 10:34:21,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1281 transitions. [2022-11-20 10:34:21,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:21,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1281 transitions. [2022-11-20 10:34:21,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 71.16666666666667) internal successors, (1281), 18 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:21,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 91.0) internal successors, (1729), 19 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:21,156 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 91.0) internal successors, (1729), 19 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:21,156 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 461 flow. Second operand 18 states and 1281 transitions. [2022-11-20 10:34:21,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 335 transitions, 3332 flow [2022-11-20 10:34:21,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 335 transitions, 3309 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:34:21,176 INFO L231 Difference]: Finished difference. Result has 112 places, 102 transitions, 562 flow [2022-11-20 10:34:21,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=562, PETRI_PLACES=112, PETRI_TRANSITIONS=102} [2022-11-20 10:34:21,178 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 40 predicate places. [2022-11-20 10:34:21,179 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 102 transitions, 562 flow [2022-11-20 10:34:21,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:21,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:21,180 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:21,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:21,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:34:21,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1018380706, now seen corresponding path program 1 times [2022-11-20 10:34:21,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583009064] [2022-11-20 10:34:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:21,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:21,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:21,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583009064] [2022-11-20 10:34:21,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583009064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:21,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102535060] [2022-11-20 10:34:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:21,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:21,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:21,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:21,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:34:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:21,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:34:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:21,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:21,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102535060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:21,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:34:21,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 10:34:21,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739214995] [2022-11-20 10:34:21,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:21,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:34:21,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:34:21,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:34:21,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 91 [2022-11-20 10:34:21,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 102 transitions, 562 flow. Second operand has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:21,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:21,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 91 [2022-11-20 10:34:21,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:22,128 INFO L130 PetriNetUnfolder]: 655/1695 cut-off events. [2022-11-20 10:34:22,128 INFO L131 PetriNetUnfolder]: For 5194/5269 co-relation queries the response was YES. [2022-11-20 10:34:22,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6692 conditions, 1695 events. 655/1695 cut-off events. For 5194/5269 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11169 event pairs, 102 based on Foata normal form. 134/1499 useless extension candidates. Maximal degree in co-relation 6277. Up to 641 conditions per place. [2022-11-20 10:34:22,149 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 83 selfloop transitions, 11 changer transitions 2/141 dead transitions. [2022-11-20 10:34:22,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 141 transitions, 1110 flow [2022-11-20 10:34:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:34:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:34:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 495 transitions. [2022-11-20 10:34:22,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7770800627943485 [2022-11-20 10:34:22,151 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 495 transitions. [2022-11-20 10:34:22,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 495 transitions. [2022-11-20 10:34:22,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:22,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 495 transitions. [2022-11-20 10:34:22,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.71428571428571) internal successors, (495), 7 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:22,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:22,156 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:22,156 INFO L175 Difference]: Start difference. First operand has 112 places, 102 transitions, 562 flow. Second operand 7 states and 495 transitions. [2022-11-20 10:34:22,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 141 transitions, 1110 flow [2022-11-20 10:34:22,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 141 transitions, 1078 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 10:34:22,174 INFO L231 Difference]: Finished difference. Result has 108 places, 98 transitions, 525 flow [2022-11-20 10:34:22,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=108, PETRI_TRANSITIONS=98} [2022-11-20 10:34:22,175 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 36 predicate places. [2022-11-20 10:34:22,176 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 98 transitions, 525 flow [2022-11-20 10:34:22,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:22,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:22,176 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:22,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:22,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:34:22,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1635204553, now seen corresponding path program 1 times [2022-11-20 10:34:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:22,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240081895] [2022-11-20 10:34:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:22,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:22,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:22,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240081895] [2022-11-20 10:34:22,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240081895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135357574] [2022-11-20 10:34:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:22,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:22,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:22,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:22,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:34:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:22,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:34:22,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:22,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:22,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135357574] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:22,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:22,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-11-20 10:34:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796546080] [2022-11-20 10:34:22,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:22,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:22,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:34:22,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 91 [2022-11-20 10:34:22,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 98 transitions, 525 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:22,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:22,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 91 [2022-11-20 10:34:22,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:23,057 INFO L130 PetriNetUnfolder]: 220/994 cut-off events. [2022-11-20 10:34:23,058 INFO L131 PetriNetUnfolder]: For 2293/2859 co-relation queries the response was YES. [2022-11-20 10:34:23,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 994 events. 220/994 cut-off events. For 2293/2859 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7335 event pairs, 105 based on Foata normal form. 26/797 useless extension candidates. Maximal degree in co-relation 2428. Up to 431 conditions per place. [2022-11-20 10:34:23,066 INFO L137 encePairwiseOnDemand]: 87/91 looper letters, 37 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2022-11-20 10:34:23,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 103 transitions, 621 flow [2022-11-20 10:34:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:34:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:34:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2022-11-20 10:34:23,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8076923076923077 [2022-11-20 10:34:23,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 294 transitions. [2022-11-20 10:34:23,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 294 transitions. [2022-11-20 10:34:23,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:23,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 294 transitions. [2022-11-20 10:34:23,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:23,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:23,071 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:23,071 INFO L175 Difference]: Start difference. First operand has 108 places, 98 transitions, 525 flow. Second operand 4 states and 294 transitions. [2022-11-20 10:34:23,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 103 transitions, 621 flow [2022-11-20 10:34:23,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 103 transitions, 607 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:34:23,079 INFO L231 Difference]: Finished difference. Result has 107 places, 97 transitions, 503 flow [2022-11-20 10:34:23,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=503, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2022-11-20 10:34:23,080 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 35 predicate places. [2022-11-20 10:34:23,080 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 503 flow [2022-11-20 10:34:23,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:23,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:23,081 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:23,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:23,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:23,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash -120120572, now seen corresponding path program 1 times [2022-11-20 10:34:23,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:23,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742999299] [2022-11-20 10:34:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:23,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:23,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:23,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742999299] [2022-11-20 10:34:23,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742999299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:23,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631658877] [2022-11-20 10:34:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:23,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:23,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:23,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:23,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:34:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:23,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:34:23,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:23,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:23,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631658877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:23,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:23,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 10:34:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137720335] [2022-11-20 10:34:23,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:34:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:34:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:34:23,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 91 [2022-11-20 10:34:23,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 64.875) internal successors, (519), 8 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:23,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:23,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 91 [2022-11-20 10:34:23,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:24,029 INFO L130 PetriNetUnfolder]: 478/1732 cut-off events. [2022-11-20 10:34:24,029 INFO L131 PetriNetUnfolder]: For 2451/2451 co-relation queries the response was YES. [2022-11-20 10:34:24,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1732 events. 478/1732 cut-off events. For 2451/2451 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 13493 event pairs, 133 based on Foata normal form. 36/1468 useless extension candidates. Maximal degree in co-relation 4023. Up to 348 conditions per place. [2022-11-20 10:34:24,043 INFO L137 encePairwiseOnDemand]: 82/91 looper letters, 54 selfloop transitions, 20 changer transitions 4/132 dead transitions. [2022-11-20 10:34:24,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 132 transitions, 840 flow [2022-11-20 10:34:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:34:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 10:34:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 538 transitions. [2022-11-20 10:34:24,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.739010989010989 [2022-11-20 10:34:24,046 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 538 transitions. [2022-11-20 10:34:24,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 538 transitions. [2022-11-20 10:34:24,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:24,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 538 transitions. [2022-11-20 10:34:24,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 67.25) internal successors, (538), 8 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:24,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:24,052 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:24,053 INFO L175 Difference]: Start difference. First operand has 107 places, 97 transitions, 503 flow. Second operand 8 states and 538 transitions. [2022-11-20 10:34:24,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 132 transitions, 840 flow [2022-11-20 10:34:24,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 132 transitions, 826 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-20 10:34:24,063 INFO L231 Difference]: Finished difference. Result has 113 places, 99 transitions, 565 flow [2022-11-20 10:34:24,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=565, PETRI_PLACES=113, PETRI_TRANSITIONS=99} [2022-11-20 10:34:24,064 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 41 predicate places. [2022-11-20 10:34:24,064 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 99 transitions, 565 flow [2022-11-20 10:34:24,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 64.875) internal successors, (519), 8 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:24,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:24,065 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:24,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 10:34:24,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:24,271 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash 818871842, now seen corresponding path program 2 times [2022-11-20 10:34:24,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:24,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145484267] [2022-11-20 10:34:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:24,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:24,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145484267] [2022-11-20 10:34:24,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145484267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:24,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744424868] [2022-11-20 10:34:24,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:24,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:24,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:24,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:24,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:34:24,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:34:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:24,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:34:24,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:24,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:24,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744424868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:24,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:24,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 10:34:24,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144304086] [2022-11-20 10:34:24,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:24,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:34:24,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:34:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:34:24,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-20 10:34:24,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 99 transitions, 565 flow. Second operand has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:24,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:24,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-20 10:34:24,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:25,164 INFO L130 PetriNetUnfolder]: 183/1380 cut-off events. [2022-11-20 10:34:25,164 INFO L131 PetriNetUnfolder]: For 5947/6314 co-relation queries the response was YES. [2022-11-20 10:34:25,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3677 conditions, 1380 events. 183/1380 cut-off events. For 5947/6314 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 9794 event pairs, 11 based on Foata normal form. 249/1551 useless extension candidates. Maximal degree in co-relation 3306. Up to 151 conditions per place. [2022-11-20 10:34:25,177 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 42 selfloop transitions, 63 changer transitions 1/174 dead transitions. [2022-11-20 10:34:25,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 174 transitions, 1500 flow [2022-11-20 10:34:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:34:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:34:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1007 transitions. [2022-11-20 10:34:25,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8512256973795436 [2022-11-20 10:34:25,181 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1007 transitions. [2022-11-20 10:34:25,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1007 transitions. [2022-11-20 10:34:25,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:25,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1007 transitions. [2022-11-20 10:34:25,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 77.46153846153847) internal successors, (1007), 13 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:25,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:25,188 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:25,188 INFO L175 Difference]: Start difference. First operand has 113 places, 99 transitions, 565 flow. Second operand 13 states and 1007 transitions. [2022-11-20 10:34:25,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 174 transitions, 1500 flow [2022-11-20 10:34:25,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 174 transitions, 1448 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-11-20 10:34:25,203 INFO L231 Difference]: Finished difference. Result has 132 places, 153 transitions, 1492 flow [2022-11-20 10:34:25,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1492, PETRI_PLACES=132, PETRI_TRANSITIONS=153} [2022-11-20 10:34:25,206 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 60 predicate places. [2022-11-20 10:34:25,206 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 153 transitions, 1492 flow [2022-11-20 10:34:25,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:25,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:25,207 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:25,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:25,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:34:25,414 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:25,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:25,414 INFO L85 PathProgramCache]: Analyzing trace with hash 956835237, now seen corresponding path program 2 times [2022-11-20 10:34:25,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:25,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404781577] [2022-11-20 10:34:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:25,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404781577] [2022-11-20 10:34:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404781577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164560295] [2022-11-20 10:34:25,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:25,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:25,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:25,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:25,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:34:25,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:34:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:34:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 10:34:25,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 10:34:25,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164560295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:25,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:25,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-20 10:34:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033286997] [2022-11-20 10:34:25,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:25,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:34:25,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:34:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:34:25,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2022-11-20 10:34:25,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 153 transitions, 1492 flow. Second operand has 16 states, 16 states have (on average 59.5625) internal successors, (953), 16 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:25,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:25,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2022-11-20 10:34:25,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:28,160 INFO L130 PetriNetUnfolder]: 2962/7422 cut-off events. [2022-11-20 10:34:28,161 INFO L131 PetriNetUnfolder]: For 33432/33520 co-relation queries the response was YES. [2022-11-20 10:34:28,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24854 conditions, 7422 events. 2962/7422 cut-off events. For 33432/33520 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 58054 event pairs, 199 based on Foata normal form. 297/7377 useless extension candidates. Maximal degree in co-relation 24028. Up to 1091 conditions per place. [2022-11-20 10:34:28,259 INFO L137 encePairwiseOnDemand]: 82/91 looper letters, 452 selfloop transitions, 23 changer transitions 12/526 dead transitions. [2022-11-20 10:34:28,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 526 transitions, 7132 flow [2022-11-20 10:34:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:34:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 10:34:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1380 transitions. [2022-11-20 10:34:28,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6893106893106893 [2022-11-20 10:34:28,264 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1380 transitions. [2022-11-20 10:34:28,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1380 transitions. [2022-11-20 10:34:28,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:28,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1380 transitions. [2022-11-20 10:34:28,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 62.72727272727273) internal successors, (1380), 22 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 91.0) internal successors, (2093), 23 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,276 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 91.0) internal successors, (2093), 23 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,277 INFO L175 Difference]: Start difference. First operand has 132 places, 153 transitions, 1492 flow. Second operand 22 states and 1380 transitions. [2022-11-20 10:34:28,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 526 transitions, 7132 flow [2022-11-20 10:34:28,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 526 transitions, 6626 flow, removed 233 selfloop flow, removed 6 redundant places. [2022-11-20 10:34:28,340 INFO L231 Difference]: Finished difference. Result has 147 places, 157 transitions, 1414 flow [2022-11-20 10:34:28,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1414, PETRI_PLACES=147, PETRI_TRANSITIONS=157} [2022-11-20 10:34:28,342 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 75 predicate places. [2022-11-20 10:34:28,342 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 157 transitions, 1414 flow [2022-11-20 10:34:28,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 59.5625) internal successors, (953), 16 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:28,343 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:28,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:28,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:28,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:28,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1137013246, now seen corresponding path program 3 times [2022-11-20 10:34:28,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213583570] [2022-11-20 10:34:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:28,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:28,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213583570] [2022-11-20 10:34:28,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213583570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:28,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341899225] [2022-11-20 10:34:28,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:34:28,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:28,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:28,787 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:28,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:34:28,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 10:34:28,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:34:28,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:29,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:29,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341899225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:29,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:29,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 10:34:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358799631] [2022-11-20 10:34:29,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:29,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:34:29,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:34:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:34:29,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-20 10:34:29,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 157 transitions, 1414 flow. Second operand has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:29,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:29,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-20 10:34:29,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:30,709 INFO L130 PetriNetUnfolder]: 476/3488 cut-off events. [2022-11-20 10:34:30,710 INFO L131 PetriNetUnfolder]: For 36839/38017 co-relation queries the response was YES. [2022-11-20 10:34:30,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10217 conditions, 3488 events. 476/3488 cut-off events. For 36839/38017 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 27416 event pairs, 12 based on Foata normal form. 836/4308 useless extension candidates. Maximal degree in co-relation 9461. Up to 429 conditions per place. [2022-11-20 10:34:30,748 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 68 selfloop transitions, 247 changer transitions 1/388 dead transitions. [2022-11-20 10:34:30,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 388 transitions, 4372 flow [2022-11-20 10:34:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:34:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 10:34:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1943 transitions. [2022-11-20 10:34:30,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8540659340659341 [2022-11-20 10:34:30,757 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1943 transitions. [2022-11-20 10:34:30,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1943 transitions. [2022-11-20 10:34:30,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:30,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1943 transitions. [2022-11-20 10:34:30,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 77.72) internal successors, (1943), 25 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:30,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 91.0) internal successors, (2366), 26 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:30,777 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 91.0) internal successors, (2366), 26 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:30,777 INFO L175 Difference]: Start difference. First operand has 147 places, 157 transitions, 1414 flow. Second operand 25 states and 1943 transitions. [2022-11-20 10:34:30,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 388 transitions, 4372 flow [2022-11-20 10:34:30,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 388 transitions, 4320 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-11-20 10:34:30,820 INFO L231 Difference]: Finished difference. Result has 178 places, 343 transitions, 4682 flow [2022-11-20 10:34:30,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4682, PETRI_PLACES=178, PETRI_TRANSITIONS=343} [2022-11-20 10:34:30,823 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 106 predicate places. [2022-11-20 10:34:30,823 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 343 transitions, 4682 flow [2022-11-20 10:34:30,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:30,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:30,824 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:30,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:31,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:34:31,030 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash -939907646, now seen corresponding path program 4 times [2022-11-20 10:34:31,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:31,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342674337] [2022-11-20 10:34:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:31,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:32,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:32,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342674337] [2022-11-20 10:34:32,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342674337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:32,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541690231] [2022-11-20 10:34:32,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:34:32,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:32,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:32,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:32,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:34:32,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:34:32,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:32,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:34:32,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:32,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:33,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541690231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:33,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:33,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-20 10:34:33,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815100383] [2022-11-20 10:34:33,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:33,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 10:34:33,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 10:34:33,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 10:34:33,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-20 10:34:33,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 343 transitions, 4682 flow. Second operand has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:33,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:33,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-20 10:34:33,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:34:37,199 INFO L130 PetriNetUnfolder]: 1238/8984 cut-off events. [2022-11-20 10:34:37,199 INFO L131 PetriNetUnfolder]: For 403249/407251 co-relation queries the response was YES. [2022-11-20 10:34:37,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28121 conditions, 8984 events. 1238/8984 cut-off events. For 403249/407251 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 76557 event pairs, 12 based on Foata normal form. 2762/11730 useless extension candidates. Maximal degree in co-relation 26711. Up to 1421 conditions per place. [2022-11-20 10:34:37,311 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 118 selfloop transitions, 911 changer transitions 1/1102 dead transitions. [2022-11-20 10:34:37,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1102 transitions, 16644 flow [2022-11-20 10:34:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 10:34:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 10:34:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3815 transitions. [2022-11-20 10:34:37,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8555729984301413 [2022-11-20 10:34:37,320 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3815 transitions. [2022-11-20 10:34:37,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3815 transitions. [2022-11-20 10:34:37,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:34:37,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3815 transitions. [2022-11-20 10:34:37,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 77.85714285714286) internal successors, (3815), 49 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:37,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 91.0) internal successors, (4550), 50 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:37,342 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 91.0) internal successors, (4550), 50 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:37,343 INFO L175 Difference]: Start difference. First operand has 178 places, 343 transitions, 4682 flow. Second operand 49 states and 3815 transitions. [2022-11-20 10:34:37,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1102 transitions, 16644 flow [2022-11-20 10:34:37,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 1102 transitions, 14165 flow, removed 1205 selfloop flow, removed 5 redundant places. [2022-11-20 10:34:37,575 INFO L231 Difference]: Finished difference. Result has 267 places, 1009 transitions, 15755 flow [2022-11-20 10:34:37,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=15755, PETRI_PLACES=267, PETRI_TRANSITIONS=1009} [2022-11-20 10:34:37,576 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 195 predicate places. [2022-11-20 10:34:37,576 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1009 transitions, 15755 flow [2022-11-20 10:34:37,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:37,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:34:37,578 INFO L209 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:37,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:37,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:37,784 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:34:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash -383568574, now seen corresponding path program 5 times [2022-11-20 10:34:37,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:37,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104903020] [2022-11-20 10:34:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:41,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104903020] [2022-11-20 10:34:41,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104903020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266855764] [2022-11-20 10:34:41,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:34:41,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:41,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:41,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:34:41,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-20 10:34:41,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 10:34:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:42,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:45,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266855764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:45,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:45,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-20 10:34:45,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018189701] [2022-11-20 10:34:45,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-20 10:34:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-20 10:34:45,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-20 10:34:45,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-20 10:34:45,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1009 transitions, 15755 flow. Second operand has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:45,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:34:45,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-20 10:34:45,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:02,045 INFO L130 PetriNetUnfolder]: 3920/27259 cut-off events. [2022-11-20 10:35:02,046 INFO L131 PetriNetUnfolder]: For 4088372/4105319 co-relation queries the response was YES. [2022-11-20 10:35:02,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87848 conditions, 27259 events. 3920/27259 cut-off events. For 4088372/4105319 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 265740 event pairs, 11 based on Foata normal form. 10261/37505 useless extension candidates. Maximal degree in co-relation 80071. Up to 4569 conditions per place. [2022-11-20 10:35:02,424 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 216 selfloop transitions, 3399 changer transitions 1/3688 dead transitions. [2022-11-20 10:35:02,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 3688 transitions, 59565 flow [2022-11-20 10:35:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-20 10:35:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-20 10:35:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 7559 transitions. [2022-11-20 10:35:02,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.856349835731279 [2022-11-20 10:35:02,454 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 7559 transitions. [2022-11-20 10:35:02,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 7559 transitions. [2022-11-20 10:35:02,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:02,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 7559 transitions. [2022-11-20 10:35:02,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 77.9278350515464) internal successors, (7559), 97 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:02,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 91.0) internal successors, (8918), 98 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:02,504 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 91.0) internal successors, (8918), 98 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:02,504 INFO L175 Difference]: Start difference. First operand has 267 places, 1009 transitions, 15755 flow. Second operand 97 states and 7559 transitions. [2022-11-20 10:35:02,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 3688 transitions, 59565 flow [2022-11-20 10:35:04,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 3688 transitions, 50310 flow, removed 4445 selfloop flow, removed 11 redundant places. [2022-11-20 10:35:04,287 INFO L231 Difference]: Finished difference. Result has 446 places, 3499 transitions, 56680 flow [2022-11-20 10:35:04,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=14562, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=921, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=56680, PETRI_PLACES=446, PETRI_TRANSITIONS=3499} [2022-11-20 10:35:04,288 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 374 predicate places. [2022-11-20 10:35:04,288 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 3499 transitions, 56680 flow [2022-11-20 10:35:04,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:04,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:04,291 INFO L209 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:04,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:04,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:04,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 10:35:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash 375182402, now seen corresponding path program 6 times [2022-11-20 10:35:04,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:04,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341307901] [2022-11-20 10:35:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:04,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:14,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341307901] [2022-11-20 10:35:14,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341307901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821360251] [2022-11-20 10:35:14,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:35:14,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:14,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:14,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:35:14,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a336d82-5384-469d-9775-f2e8b4a6f97f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:35:15,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-20 10:35:15,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:35:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 10:35:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:16,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:28,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821360251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:28,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:35:28,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-20 10:35:28,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826323770] [2022-11-20 10:35:28,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:28,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-20 10:35:28,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-20 10:35:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-20 10:35:28,987 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-20 10:35:29,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 3499 transitions, 56680 flow. Second operand has 193 states, 193 states have (on average 73.02072538860104) internal successors, (14093), 193 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:29,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:29,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-20 10:35:29,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand