./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 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_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a --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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- 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-b5237d8 [2022-11-21 16:33:48,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:33:48,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:33:48,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:33:48,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:33:48,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:33:48,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:33:48,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:33:48,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:33:48,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:33:48,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:33:48,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:33:48,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:33:48,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:33:48,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:33:48,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:33:48,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:33:48,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:33:48,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:33:48,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:33:48,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:33:48,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:33:48,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:33:48,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:33:48,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:33:48,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:33:48,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:33:48,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:33:48,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:33:48,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:33:48,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:33:48,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:33:48,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:33:48,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:33:48,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:33:48,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:33:48,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:33:48,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:33:48,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:33:48,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:33:48,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:33:48,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 16:33:48,163 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:33:48,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:33:48,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:33:48,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:33:48,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:33:48,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:33:48,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:33:48,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:33:48,166 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:33:48,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:33:48,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:33:48,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:33:48,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:33:48,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:33:48,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:33:48,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:33:48,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:33:48,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:33:48,168 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 16:33:48,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:33:48,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:33:48,168 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:33:48,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:33:48,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:33:48,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:33:48,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:33:48,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:33:48,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:33:48,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:33:48,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:33:48,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:33:48,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:33:48,171 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:33:48,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:33:48,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:33:48,171 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_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-21 16:33:48,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:33:48,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:33:48,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:33:48,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:33:48,476 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:33:48,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-21 16:33:51,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:33:51,768 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:33:51,769 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-21 16:33:51,777 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/data/ccbc265fb/ccf1aa283a314795ac3d5e2dcb464d90/FLAG5add47df5 [2022-11-21 16:33:51,793 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/data/ccbc265fb/ccf1aa283a314795ac3d5e2dcb464d90 [2022-11-21 16:33:51,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:33:51,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:33:51,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:33:51,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:33:51,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:33:51,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:33:51" (1/1) ... [2022-11-21 16:33:51,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121ffc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:51, skipping insertion in model container [2022-11-21 16:33:51,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:33:51" (1/1) ... [2022-11-21 16:33:51,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:33:51,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:33:52,038 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_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-21 16:33:52,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:33:52,064 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:33:52,118 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_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-21 16:33:52,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:33:52,146 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:33:52,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52 WrapperNode [2022-11-21 16:33:52,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:33:52,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:33:52,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:33:52,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:33:52,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,224 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 171 [2022-11-21 16:33:52,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:33:52,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:33:52,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:33:52,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:33:52,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:33:52,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:33:52,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:33:52,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:33:52,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (1/1) ... [2022-11-21 16:33:52,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:33:52,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:33:52,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:33:52,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:33:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:33:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:33:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:33:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:33:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:33:52,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:33:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:33:52,392 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:33:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:33:52,392 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:33:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:33:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:33:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:33:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:33:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:33:52,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:33:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:33:52,396 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:33:52,535 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:33:52,537 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:33:52,938 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:33:53,157 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:33:53,163 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:33:53,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:33:53 BoogieIcfgContainer [2022-11-21 16:33:53,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:33:53,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:33:53,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:33:53,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:33:53,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:33:51" (1/3) ... [2022-11-21 16:33:53,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e01ceb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:33:53, skipping insertion in model container [2022-11-21 16:33:53,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:52" (2/3) ... [2022-11-21 16:33:53,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e01ceb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:33:53, skipping insertion in model container [2022-11-21 16:33:53,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:33:53" (3/3) ... [2022-11-21 16:33:53,181 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-11-21 16:33:53,192 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:33:53,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:33:53,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-21 16:33:53,205 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:33:53,360 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 16:33:53,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 153 transitions, 330 flow [2022-11-21 16:33:53,591 INFO L130 PetriNetUnfolder]: 10/150 cut-off events. [2022-11-21 16:33:53,593 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 16:33:53,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 10/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-21 16:33:53,599 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 153 transitions, 330 flow [2022-11-21 16:33:53,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 134 transitions, 280 flow [2022-11-21 16:33:53,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:33:53,638 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;@152452c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:33:53,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-21 16:33:53,663 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-21 16:33:53,663 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:33:53,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:33:53,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:33:53,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:33:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1699002523, now seen corresponding path program 1 times [2022-11-21 16:33:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326081396] [2022-11-21 16:33:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:54,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:54,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326081396] [2022-11-21 16:33:54,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326081396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:54,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:54,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:54,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907961619] [2022-11-21 16:33:54,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:54,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:33:54,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:33:54,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:33:54,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-21 16:33:54,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 134 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:54,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:33:54,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-21 16:33:54,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:33:54,697 INFO L130 PetriNetUnfolder]: 291/990 cut-off events. [2022-11-21 16:33:54,697 INFO L131 PetriNetUnfolder]: For 144/152 co-relation queries the response was YES. [2022-11-21 16:33:54,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 990 events. 291/990 cut-off events. For 144/152 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6696 event pairs, 156 based on Foata normal form. 86/758 useless extension candidates. Maximal degree in co-relation 710. Up to 227 conditions per place. [2022-11-21 16:33:54,716 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 44 selfloop transitions, 4 changer transitions 2/149 dead transitions. [2022-11-21 16:33:54,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 149 transitions, 418 flow [2022-11-21 16:33:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:33:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:33:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 647 transitions. [2022-11-21 16:33:54,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8457516339869281 [2022-11-21 16:33:54,744 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 647 transitions. [2022-11-21 16:33:54,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 647 transitions. [2022-11-21 16:33:54,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:33:54,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 647 transitions. [2022-11-21 16:33:54,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.4) internal successors, (647), 5 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:54,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:54,770 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:54,773 INFO L175 Difference]: Start difference. First operand has 134 places, 134 transitions, 280 flow. Second operand 5 states and 647 transitions. [2022-11-21 16:33:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 149 transitions, 418 flow [2022-11-21 16:33:54,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 149 transitions, 406 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:33:54,784 INFO L231 Difference]: Finished difference. Result has 136 places, 128 transitions, 286 flow [2022-11-21 16:33:54,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2022-11-21 16:33:54,790 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 2 predicate places. [2022-11-21 16:33:54,791 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 286 flow [2022-11-21 16:33:54,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:54,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:33:54,792 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:33:54,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:33:54,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:33:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:54,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1738197979, now seen corresponding path program 1 times [2022-11-21 16:33:54,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:54,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417356447] [2022-11-21 16:33:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:54,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:55,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:55,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417356447] [2022-11-21 16:33:55,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417356447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:55,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:55,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:33:55,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597410344] [2022-11-21 16:33:55,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:55,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:55,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 153 [2022-11-21 16:33:55,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:55,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:33:55,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 153 [2022-11-21 16:33:55,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:33:55,376 INFO L130 PetriNetUnfolder]: 271/782 cut-off events. [2022-11-21 16:33:55,376 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-21 16:33:55,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 782 events. 271/782 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4236 event pairs, 84 based on Foata normal form. 34/508 useless extension candidates. Maximal degree in co-relation 708. Up to 310 conditions per place. [2022-11-21 16:33:55,384 INFO L137 encePairwiseOnDemand]: 142/153 looper letters, 24 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2022-11-21 16:33:55,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 137 transitions, 369 flow [2022-11-21 16:33:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:33:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2022-11-21 16:33:55,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8671023965141612 [2022-11-21 16:33:55,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2022-11-21 16:33:55,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2022-11-21 16:33:55,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:33:55,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2022-11-21 16:33:55,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 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) [2022-11-21 16:33:55,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:55,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:55,392 INFO L175 Difference]: Start difference. First operand has 136 places, 128 transitions, 286 flow. Second operand 3 states and 398 transitions. [2022-11-21 16:33:55,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 137 transitions, 369 flow [2022-11-21 16:33:55,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 137 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:33:55,397 INFO L231 Difference]: Finished difference. Result has 137 places, 132 transitions, 336 flow [2022-11-21 16:33:55,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=137, PETRI_TRANSITIONS=132} [2022-11-21 16:33:55,398 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 3 predicate places. [2022-11-21 16:33:55,399 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 132 transitions, 336 flow [2022-11-21 16:33:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:55,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:33:55,400 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:33:55,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:33:55,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:33:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:55,401 INFO L85 PathProgramCache]: Analyzing trace with hash 806921437, now seen corresponding path program 1 times [2022-11-21 16:33:55,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:55,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347819929] [2022-11-21 16:33:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:55,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:55,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347819929] [2022-11-21 16:33:55,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347819929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:33:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103534621] [2022-11-21 16:33:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:55,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:33:55,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:33:55,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:33:55,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:33:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:55,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:33:55,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:55,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:33:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:55,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103534621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:33:55,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:33:55,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 16:33:55,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223503751] [2022-11-21 16:33:55,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:33:55,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:33:55,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:33:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:33:55,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-21 16:33:55,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 132 transitions, 336 flow. Second operand has 12 states, 12 states have (on average 119.66666666666667) internal successors, (1436), 12 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:55,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:33:55,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-21 16:33:55,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:33:56,669 INFO L130 PetriNetUnfolder]: 551/1714 cut-off events. [2022-11-21 16:33:56,669 INFO L131 PetriNetUnfolder]: For 692/2352 co-relation queries the response was YES. [2022-11-21 16:33:56,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 1714 events. 551/1714 cut-off events. For 692/2352 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11607 event pairs, 250 based on Foata normal form. 3/1167 useless extension candidates. Maximal degree in co-relation 869. Up to 382 conditions per place. [2022-11-21 16:33:56,685 INFO L137 encePairwiseOnDemand]: 146/153 looper letters, 118 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2022-11-21 16:33:56,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 235 transitions, 988 flow [2022-11-21 16:33:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:33:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 16:33:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2225 transitions. [2022-11-21 16:33:56,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8079157588961511 [2022-11-21 16:33:56,691 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2225 transitions. [2022-11-21 16:33:56,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2225 transitions. [2022-11-21 16:33:56,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:33:56,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2225 transitions. [2022-11-21 16:33:56,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 123.61111111111111) internal successors, (2225), 18 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:56,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:56,706 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:56,707 INFO L175 Difference]: Start difference. First operand has 137 places, 132 transitions, 336 flow. Second operand 18 states and 2225 transitions. [2022-11-21 16:33:56,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 235 transitions, 988 flow [2022-11-21 16:33:56,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 235 transitions, 942 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 16:33:56,716 INFO L231 Difference]: Finished difference. Result has 156 places, 144 transitions, 428 flow [2022-11-21 16:33:56,716 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=428, PETRI_PLACES=156, PETRI_TRANSITIONS=144} [2022-11-21 16:33:56,718 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 22 predicate places. [2022-11-21 16:33:56,718 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 144 transitions, 428 flow [2022-11-21 16:33:56,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.66666666666667) internal successors, (1436), 12 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:56,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:33:56,719 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:33:56,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 16:33:56,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:33:56,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:33:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash -755238765, now seen corresponding path program 1 times [2022-11-21 16:33:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:56,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490131778] [2022-11-21 16:33:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:57,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:57,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490131778] [2022-11-21 16:33:57,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490131778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:33:57,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662704865] [2022-11-21 16:33:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:57,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:33:57,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:33:57,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:33:57,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:33:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:33:57,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:57,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:57,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662704865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:57,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:33:57,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 16:33:57,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143555126] [2022-11-21 16:33:57,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:57,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:33:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:57,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:33:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:33:57,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-21 16:33:57,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 144 transitions, 428 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:57,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:33:57,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-21 16:33:57,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:33:57,763 INFO L130 PetriNetUnfolder]: 551/1710 cut-off events. [2022-11-21 16:33:57,763 INFO L131 PetriNetUnfolder]: For 307/1167 co-relation queries the response was YES. [2022-11-21 16:33:57,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 1710 events. 551/1710 cut-off events. For 307/1167 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11565 event pairs, 250 based on Foata normal form. 4/1124 useless extension candidates. Maximal degree in co-relation 2785. Up to 716 conditions per place. [2022-11-21 16:33:57,781 INFO L137 encePairwiseOnDemand]: 148/153 looper letters, 53 selfloop transitions, 11 changer transitions 0/163 dead transitions. [2022-11-21 16:33:57,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 163 transitions, 607 flow [2022-11-21 16:33:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:33:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:33:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 867 transitions. [2022-11-21 16:33:57,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2022-11-21 16:33:57,784 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 867 transitions. [2022-11-21 16:33:57,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 867 transitions. [2022-11-21 16:33:57,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:33:57,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 867 transitions. [2022-11-21 16:33:57,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.85714285714286) internal successors, (867), 7 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:57,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:57,790 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:57,790 INFO L175 Difference]: Start difference. First operand has 156 places, 144 transitions, 428 flow. Second operand 7 states and 867 transitions. [2022-11-21 16:33:57,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 163 transitions, 607 flow [2022-11-21 16:33:57,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 163 transitions, 575 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-21 16:33:57,799 INFO L231 Difference]: Finished difference. Result has 152 places, 140 transitions, 391 flow [2022-11-21 16:33:57,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=152, PETRI_TRANSITIONS=140} [2022-11-21 16:33:57,802 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 18 predicate places. [2022-11-21 16:33:57,802 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 140 transitions, 391 flow [2022-11-21 16:33:57,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:57,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:33:57,803 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:33:57,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 16:33:58,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:33:58,008 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:33:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash -446511252, now seen corresponding path program 1 times [2022-11-21 16:33:58,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:58,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904502068] [2022-11-21 16:33:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:58,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:58,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:58,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904502068] [2022-11-21 16:33:58,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904502068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:58,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:58,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:33:58,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081448017] [2022-11-21 16:33:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:33:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:33:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:33:58,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 153 [2022-11-21 16:33:58,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 140 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:58,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:33:58,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 153 [2022-11-21 16:33:58,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:33:58,529 INFO L130 PetriNetUnfolder]: 576/1665 cut-off events. [2022-11-21 16:33:58,529 INFO L131 PetriNetUnfolder]: For 292/692 co-relation queries the response was YES. [2022-11-21 16:33:58,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3300 conditions, 1665 events. 576/1665 cut-off events. For 292/692 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 10453 event pairs, 270 based on Foata normal form. 0/1095 useless extension candidates. Maximal degree in co-relation 2632. Up to 864 conditions per place. [2022-11-21 16:33:58,543 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 18 selfloop transitions, 4 changer transitions 0/136 dead transitions. [2022-11-21 16:33:58,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 136 transitions, 419 flow [2022-11-21 16:33:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:33:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:33:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2022-11-21 16:33:58,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8196078431372549 [2022-11-21 16:33:58,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2022-11-21 16:33:58,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2022-11-21 16:33:58,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:33:58,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2022-11-21 16:33:58,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:58,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:58,552 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:58,552 INFO L175 Difference]: Start difference. First operand has 152 places, 140 transitions, 391 flow. Second operand 5 states and 627 transitions. [2022-11-21 16:33:58,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 136 transitions, 419 flow [2022-11-21 16:33:58,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 136 transitions, 405 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:33:58,558 INFO L231 Difference]: Finished difference. Result has 149 places, 136 transitions, 369 flow [2022-11-21 16:33:58,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=149, PETRI_TRANSITIONS=136} [2022-11-21 16:33:58,561 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 15 predicate places. [2022-11-21 16:33:58,561 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 136 transitions, 369 flow [2022-11-21 16:33:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:58,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:33:58,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:33:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:33:58,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:33:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash -446511253, now seen corresponding path program 1 times [2022-11-21 16:33:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:58,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973898007] [2022-11-21 16:33:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:58,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:58,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:58,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973898007] [2022-11-21 16:33:58,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973898007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:58,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:58,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285471999] [2022-11-21 16:33:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:58,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:58,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:58,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:58,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:58,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 153 [2022-11-21 16:33:58,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 136 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:58,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:33:58,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 153 [2022-11-21 16:33:58,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:33:59,189 INFO L130 PetriNetUnfolder]: 906/2500 cut-off events. [2022-11-21 16:33:59,190 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2022-11-21 16:33:59,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4995 conditions, 2500 events. 906/2500 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 17692 event pairs, 180 based on Foata normal form. 0/1865 useless extension candidates. Maximal degree in co-relation 4953. Up to 1151 conditions per place. [2022-11-21 16:33:59,217 INFO L137 encePairwiseOnDemand]: 150/153 looper letters, 24 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2022-11-21 16:33:59,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 144 transitions, 446 flow [2022-11-21 16:33:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:33:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2022-11-21 16:33:59,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8758169934640523 [2022-11-21 16:33:59,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2022-11-21 16:33:59,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2022-11-21 16:33:59,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:33:59,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2022-11-21 16:33:59,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:59,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:59,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:59,227 INFO L175 Difference]: Start difference. First operand has 149 places, 136 transitions, 369 flow. Second operand 3 states and 402 transitions. [2022-11-21 16:33:59,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 144 transitions, 446 flow [2022-11-21 16:33:59,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 144 transitions, 438 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:33:59,231 INFO L231 Difference]: Finished difference. Result has 148 places, 136 transitions, 369 flow [2022-11-21 16:33:59,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=148, PETRI_TRANSITIONS=136} [2022-11-21 16:33:59,235 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 14 predicate places. [2022-11-21 16:33:59,235 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 136 transitions, 369 flow [2022-11-21 16:33:59,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:59,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:33:59,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:33:59,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:33:59,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:33:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash -446511287, now seen corresponding path program 1 times [2022-11-21 16:33:59,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:59,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885500497] [2022-11-21 16:33:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:59,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:59,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885500497] [2022-11-21 16:33:59,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885500497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:59,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:59,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:33:59,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2604774] [2022-11-21 16:33:59,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:59,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:33:59,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:33:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:33:59,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 153 [2022-11-21 16:33:59,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 136 transitions, 369 flow. Second operand has 9 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:59,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:33:59,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 153 [2022-11-21 16:33:59,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:34:00,208 INFO L130 PetriNetUnfolder]: 931/2244 cut-off events. [2022-11-21 16:34:00,209 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2022-11-21 16:34:00,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4973 conditions, 2244 events. 931/2244 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 15019 event pairs, 460 based on Foata normal form. 23/1647 useless extension candidates. Maximal degree in co-relation 4612. Up to 1241 conditions per place. [2022-11-21 16:34:00,231 INFO L137 encePairwiseOnDemand]: 134/153 looper letters, 42 selfloop transitions, 7 changer transitions 20/163 dead transitions. [2022-11-21 16:34:00,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 163 transitions, 593 flow [2022-11-21 16:34:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:34:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-21 16:34:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1267 transitions. [2022-11-21 16:34:00,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7528223410576351 [2022-11-21 16:34:00,235 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1267 transitions. [2022-11-21 16:34:00,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1267 transitions. [2022-11-21 16:34:00,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:34:00,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1267 transitions. [2022-11-21 16:34:00,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 115.18181818181819) internal successors, (1267), 11 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:00,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:00,243 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:00,244 INFO L175 Difference]: Start difference. First operand has 148 places, 136 transitions, 369 flow. Second operand 11 states and 1267 transitions. [2022-11-21 16:34:00,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 163 transitions, 593 flow [2022-11-21 16:34:00,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 163 transitions, 591 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:34:00,248 INFO L231 Difference]: Finished difference. Result has 162 places, 136 transitions, 433 flow [2022-11-21 16:34:00,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=433, PETRI_PLACES=162, PETRI_TRANSITIONS=136} [2022-11-21 16:34:00,249 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 28 predicate places. [2022-11-21 16:34:00,249 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 136 transitions, 433 flow [2022-11-21 16:34:00,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:00,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:34:00,250 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:00,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:34:00,251 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:34:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 586446919, now seen corresponding path program 1 times [2022-11-21 16:34:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:00,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029114009] [2022-11-21 16:34:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:00,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:00,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:00,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029114009] [2022-11-21 16:34:00,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029114009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:34:00,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756141342] [2022-11-21 16:34:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:00,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:34:00,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:34:00,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:34:00,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:34:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:00,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:34:00,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:34:00,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:34:00,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756141342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:00,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:34:00,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-21 16:34:00,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536088489] [2022-11-21 16:34:00,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:00,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:34:00,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:00,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:34:00,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:34:00,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 153 [2022-11-21 16:34:00,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 136 transitions, 433 flow. Second operand has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:00,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:34:00,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 153 [2022-11-21 16:34:00,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:34:01,478 INFO L130 PetriNetUnfolder]: 569/1443 cut-off events. [2022-11-21 16:34:01,478 INFO L131 PetriNetUnfolder]: For 1786/1882 co-relation queries the response was YES. [2022-11-21 16:34:01,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 1443 events. 569/1443 cut-off events. For 1786/1882 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8610 event pairs, 64 based on Foata normal form. 84/1243 useless extension candidates. Maximal degree in co-relation 4684. Up to 422 conditions per place. [2022-11-21 16:34:01,497 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 24 selfloop transitions, 11 changer transitions 5/148 dead transitions. [2022-11-21 16:34:01,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 148 transitions, 618 flow [2022-11-21 16:34:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:34:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:34:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1087 transitions. [2022-11-21 16:34:01,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7893972403776325 [2022-11-21 16:34:01,502 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1087 transitions. [2022-11-21 16:34:01,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1087 transitions. [2022-11-21 16:34:01,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:34:01,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1087 transitions. [2022-11-21 16:34:01,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.77777777777777) internal successors, (1087), 9 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:01,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:01,509 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:01,509 INFO L175 Difference]: Start difference. First operand has 162 places, 136 transitions, 433 flow. Second operand 9 states and 1087 transitions. [2022-11-21 16:34:01,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 148 transitions, 618 flow [2022-11-21 16:34:01,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 148 transitions, 575 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-11-21 16:34:01,516 INFO L231 Difference]: Finished difference. Result has 157 places, 131 transitions, 406 flow [2022-11-21 16:34:01,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2022-11-21 16:34:01,517 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 23 predicate places. [2022-11-21 16:34:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 406 flow [2022-11-21 16:34:01,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:01,518 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:34:01,518 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:01,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:34:01,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-21 16:34:01,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:34:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1086280732, now seen corresponding path program 1 times [2022-11-21 16:34:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:01,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248015763] [2022-11-21 16:34:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:03,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248015763] [2022-11-21 16:34:03,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248015763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:34:03,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846266055] [2022-11-21 16:34:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:03,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:34:03,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:34:03,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:34:03,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:34:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-21 16:34:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:04,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 16:34:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:34:05,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-21 16:34:05,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:34:05,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-21 16:34:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:05,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:11,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:34:11,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-21 16:34:11,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:34:11,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 162 [2022-11-21 16:34:11,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-11-21 16:34:11,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-21 16:34:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:13,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846266055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:13,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:34:13,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 20] total 59 [2022-11-21 16:34:13,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218794913] [2022-11-21 16:34:13,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:13,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-21 16:34:13,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-21 16:34:13,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3261, Unknown=6, NotChecked=0, Total=3540 [2022-11-21 16:34:13,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 153 [2022-11-21 16:34:13,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 131 transitions, 406 flow. Second operand has 60 states, 60 states have (on average 74.2) internal successors, (4452), 60 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:13,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:34:13,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 153 [2022-11-21 16:34:13,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:34:30,915 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 143 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:34:32,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:34:51,158 WARN L233 SmtUtils]: Spent 11.46s on a formula simplification. DAG size of input: 157 DAG size of output: 134 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:35:02,549 WARN L233 SmtUtils]: Spent 11.03s on a formula simplification. DAG size of input: 153 DAG size of output: 131 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:35:15,019 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 136 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:35:20,904 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 147 DAG size of output: 121 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:35:27,854 INFO L130 PetriNetUnfolder]: 4650/10798 cut-off events. [2022-11-21 16:35:27,854 INFO L131 PetriNetUnfolder]: For 9581/9735 co-relation queries the response was YES. [2022-11-21 16:35:27,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30550 conditions, 10798 events. 4650/10798 cut-off events. For 9581/9735 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 97533 event pairs, 1099 based on Foata normal form. 0/9059 useless extension candidates. Maximal degree in co-relation 30424. Up to 2475 conditions per place. [2022-11-21 16:35:27,965 INFO L137 encePairwiseOnDemand]: 120/153 looper letters, 240 selfloop transitions, 80 changer transitions 3/382 dead transitions. [2022-11-21 16:35:27,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 382 transitions, 2237 flow [2022-11-21 16:35:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-21 16:35:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-21 16:35:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4206 transitions. [2022-11-21 16:35:27,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5090777051561365 [2022-11-21 16:35:27,981 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4206 transitions. [2022-11-21 16:35:27,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4206 transitions. [2022-11-21 16:35:27,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:27,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4206 transitions. [2022-11-21 16:35:27,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 77.88888888888889) internal successors, (4206), 54 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:28,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 153.0) internal successors, (8415), 55 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:28,013 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 153.0) internal successors, (8415), 55 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:28,014 INFO L175 Difference]: Start difference. First operand has 157 places, 131 transitions, 406 flow. Second operand 54 states and 4206 transitions. [2022-11-21 16:35:28,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 382 transitions, 2237 flow [2022-11-21 16:35:28,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 382 transitions, 2009 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-21 16:35:28,030 INFO L231 Difference]: Finished difference. Result has 220 places, 196 transitions, 1012 flow [2022-11-21 16:35:28,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1012, PETRI_PLACES=220, PETRI_TRANSITIONS=196} [2022-11-21 16:35:28,031 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 86 predicate places. [2022-11-21 16:35:28,032 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 196 transitions, 1012 flow [2022-11-21 16:35:28,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 74.2) internal successors, (4452), 60 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:28,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:28,034 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:28,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:28,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:28,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:35:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash 976946277, now seen corresponding path program 1 times [2022-11-21 16:35:28,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:28,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782955346] [2022-11-21 16:35:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:28,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:35:28,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782955346] [2022-11-21 16:35:28,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782955346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:35:28,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:35:28,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:35:28,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762819426] [2022-11-21 16:35:28,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:35:28,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:35:28,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:35:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:35:28,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 153 [2022-11-21 16:35:28,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 196 transitions, 1012 flow. Second operand has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:28,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:28,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 153 [2022-11-21 16:35:28,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:30,791 INFO L130 PetriNetUnfolder]: 3099/7704 cut-off events. [2022-11-21 16:35:30,792 INFO L131 PetriNetUnfolder]: For 46329/46828 co-relation queries the response was YES. [2022-11-21 16:35:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27503 conditions, 7704 events. 3099/7704 cut-off events. For 46329/46828 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 70412 event pairs, 992 based on Foata normal form. 146/6814 useless extension candidates. Maximal degree in co-relation 27365. Up to 3280 conditions per place. [2022-11-21 16:35:30,915 INFO L137 encePairwiseOnDemand]: 146/153 looper letters, 87 selfloop transitions, 8 changer transitions 2/217 dead transitions. [2022-11-21 16:35:30,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 217 transitions, 1313 flow [2022-11-21 16:35:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:35:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:35:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 608 transitions. [2022-11-21 16:35:30,918 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7947712418300653 [2022-11-21 16:35:30,918 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 608 transitions. [2022-11-21 16:35:30,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 608 transitions. [2022-11-21 16:35:30,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:30,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 608 transitions. [2022-11-21 16:35:30,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.6) internal successors, (608), 5 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:30,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:30,922 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:30,923 INFO L175 Difference]: Start difference. First operand has 220 places, 196 transitions, 1012 flow. Second operand 5 states and 608 transitions. [2022-11-21 16:35:30,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 217 transitions, 1313 flow [2022-11-21 16:35:31,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 217 transitions, 1212 flow, removed 36 selfloop flow, removed 15 redundant places. [2022-11-21 16:35:31,216 INFO L231 Difference]: Finished difference. Result has 210 places, 197 transitions, 946 flow [2022-11-21 16:35:31,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=946, PETRI_PLACES=210, PETRI_TRANSITIONS=197} [2022-11-21 16:35:31,217 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 76 predicate places. [2022-11-21 16:35:31,217 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 197 transitions, 946 flow [2022-11-21 16:35:31,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:31,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:31,219 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:35:31,219 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:35:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1475869979, now seen corresponding path program 2 times [2022-11-21 16:35:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239621265] [2022-11-21 16:35:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:31,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:31,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239621265] [2022-11-21 16:35:31,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239621265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:31,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672621203] [2022-11-21 16:35:31,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:35:31,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:31,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:31,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:35:31,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:35:31,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:35:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 16:35:31,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 16:35:32,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672621203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:32,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:32,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-21 16:35:32,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808156381] [2022-11-21 16:35:32,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:32,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:35:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:35:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:35:32,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 153 [2022-11-21 16:35:32,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 197 transitions, 946 flow. Second operand has 18 states, 18 states have (on average 109.61111111111111) internal successors, (1973), 18 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:32,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:32,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 153 [2022-11-21 16:35:32,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:34,153 INFO L130 PetriNetUnfolder]: 1520/5354 cut-off events. [2022-11-21 16:35:34,153 INFO L131 PetriNetUnfolder]: For 32058/32309 co-relation queries the response was YES. [2022-11-21 16:35:34,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19214 conditions, 5354 events. 1520/5354 cut-off events. For 32058/32309 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 49299 event pairs, 997 based on Foata normal form. 7/4790 useless extension candidates. Maximal degree in co-relation 19083. Up to 1406 conditions per place. [2022-11-21 16:35:34,239 INFO L137 encePairwiseOnDemand]: 142/153 looper letters, 152 selfloop transitions, 25 changer transitions 0/301 dead transitions. [2022-11-21 16:35:34,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 301 transitions, 2186 flow [2022-11-21 16:35:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:35:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-21 16:35:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2667 transitions. [2022-11-21 16:35:34,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7263071895424836 [2022-11-21 16:35:34,246 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2667 transitions. [2022-11-21 16:35:34,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2667 transitions. [2022-11-21 16:35:34,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:34,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2667 transitions. [2022-11-21 16:35:34,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 111.125) internal successors, (2667), 24 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:34,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 153.0) internal successors, (3825), 25 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:34,264 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 153.0) internal successors, (3825), 25 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:34,265 INFO L175 Difference]: Start difference. First operand has 210 places, 197 transitions, 946 flow. Second operand 24 states and 2667 transitions. [2022-11-21 16:35:34,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 301 transitions, 2186 flow [2022-11-21 16:35:34,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 301 transitions, 2155 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-21 16:35:34,441 INFO L231 Difference]: Finished difference. Result has 227 places, 201 transitions, 1005 flow [2022-11-21 16:35:34,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1005, PETRI_PLACES=227, PETRI_TRANSITIONS=201} [2022-11-21 16:35:34,442 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 93 predicate places. [2022-11-21 16:35:34,443 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 201 transitions, 1005 flow [2022-11-21 16:35:34,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.61111111111111) internal successors, (1973), 18 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:34,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:34,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:34,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:34,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:34,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:35:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:34,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1189873969, now seen corresponding path program 1 times [2022-11-21 16:35:34,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:34,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750849698] [2022-11-21 16:35:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:34,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:35:34,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:34,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750849698] [2022-11-21 16:35:34,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750849698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:35:34,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:35:34,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:35:34,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203681220] [2022-11-21 16:35:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:35:34,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:35:34,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:35:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:35:34,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 153 [2022-11-21 16:35:34,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 201 transitions, 1005 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:34,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:34,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 153 [2022-11-21 16:35:34,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:36,681 INFO L130 PetriNetUnfolder]: 2801/9441 cut-off events. [2022-11-21 16:35:36,681 INFO L131 PetriNetUnfolder]: For 66561/67344 co-relation queries the response was YES. [2022-11-21 16:35:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34160 conditions, 9441 events. 2801/9441 cut-off events. For 66561/67344 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 93618 event pairs, 895 based on Foata normal form. 367/8925 useless extension candidates. Maximal degree in co-relation 23698. Up to 2530 conditions per place. [2022-11-21 16:35:36,799 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 58 selfloop transitions, 18 changer transitions 0/237 dead transitions. [2022-11-21 16:35:36,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 237 transitions, 1496 flow [2022-11-21 16:35:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:35:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:35:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 526 transitions. [2022-11-21 16:35:36,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8594771241830066 [2022-11-21 16:35:36,802 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 526 transitions. [2022-11-21 16:35:36,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 526 transitions. [2022-11-21 16:35:36,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:36,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 526 transitions. [2022-11-21 16:35:36,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:36,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:36,805 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:36,805 INFO L175 Difference]: Start difference. First operand has 227 places, 201 transitions, 1005 flow. Second operand 4 states and 526 transitions. [2022-11-21 16:35:36,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 237 transitions, 1496 flow [2022-11-21 16:35:37,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 237 transitions, 1438 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-21 16:35:37,009 INFO L231 Difference]: Finished difference. Result has 215 places, 217 transitions, 1241 flow [2022-11-21 16:35:37,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1241, PETRI_PLACES=215, PETRI_TRANSITIONS=217} [2022-11-21 16:35:37,011 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 81 predicate places. [2022-11-21 16:35:37,011 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 217 transitions, 1241 flow [2022-11-21 16:35:37,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:37,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:37,012 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:37,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:35:37,012 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:35:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash 390826221, now seen corresponding path program 1 times [2022-11-21 16:35:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:37,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447473317] [2022-11-21 16:35:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:37,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:35:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447473317] [2022-11-21 16:35:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447473317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:35:37,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:35:37,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:35:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719138781] [2022-11-21 16:35:37,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:35:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:35:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:35:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:35:37,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 153 [2022-11-21 16:35:37,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 217 transitions, 1241 flow. Second operand has 12 states, 12 states have (on average 94.75) internal successors, (1137), 12 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:37,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:37,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 153 [2022-11-21 16:35:37,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:41,584 INFO L130 PetriNetUnfolder]: 7026/17879 cut-off events. [2022-11-21 16:35:41,584 INFO L131 PetriNetUnfolder]: For 152791/154710 co-relation queries the response was YES. [2022-11-21 16:35:41,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68694 conditions, 17879 events. 7026/17879 cut-off events. For 152791/154710 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 174793 event pairs, 2051 based on Foata normal form. 245/16614 useless extension candidates. Maximal degree in co-relation 50554. Up to 8437 conditions per place. [2022-11-21 16:35:41,776 INFO L137 encePairwiseOnDemand]: 139/153 looper letters, 101 selfloop transitions, 21 changer transitions 2/230 dead transitions. [2022-11-21 16:35:41,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 230 transitions, 1542 flow [2022-11-21 16:35:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:35:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:35:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1254 transitions. [2022-11-21 16:35:41,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6304675716440422 [2022-11-21 16:35:41,782 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1254 transitions. [2022-11-21 16:35:41,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1254 transitions. [2022-11-21 16:35:41,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:41,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1254 transitions. [2022-11-21 16:35:41,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 96.46153846153847) internal successors, (1254), 13 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:41,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 153.0) internal successors, (2142), 14 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:41,794 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 153.0) internal successors, (2142), 14 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:41,794 INFO L175 Difference]: Start difference. First operand has 215 places, 217 transitions, 1241 flow. Second operand 13 states and 1254 transitions. [2022-11-21 16:35:41,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 230 transitions, 1542 flow [2022-11-21 16:35:42,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 230 transitions, 1542 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:35:42,254 INFO L231 Difference]: Finished difference. Result has 227 places, 216 transitions, 1277 flow [2022-11-21 16:35:42,254 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1277, PETRI_PLACES=227, PETRI_TRANSITIONS=216} [2022-11-21 16:35:42,255 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 93 predicate places. [2022-11-21 16:35:42,256 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 216 transitions, 1277 flow [2022-11-21 16:35:42,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 94.75) internal successors, (1137), 12 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:42,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:42,257 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:42,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:35:42,257 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:35:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1899547978, now seen corresponding path program 1 times [2022-11-21 16:35:42,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:42,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590654042] [2022-11-21 16:35:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:42,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:35:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590654042] [2022-11-21 16:35:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590654042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:35:42,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:35:42,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:35:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402292672] [2022-11-21 16:35:42,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:35:42,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:35:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:35:42,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:35:42,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 153 [2022-11-21 16:35:42,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 216 transitions, 1277 flow. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:42,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:42,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 153 [2022-11-21 16:35:42,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:45,788 INFO L130 PetriNetUnfolder]: 4712/16080 cut-off events. [2022-11-21 16:35:45,788 INFO L131 PetriNetUnfolder]: For 158878/159232 co-relation queries the response was YES. [2022-11-21 16:35:45,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67494 conditions, 16080 events. 4712/16080 cut-off events. For 158878/159232 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 178748 event pairs, 1151 based on Foata normal form. 694/15809 useless extension candidates. Maximal degree in co-relation 47407. Up to 3978 conditions per place. [2022-11-21 16:35:45,995 INFO L137 encePairwiseOnDemand]: 149/153 looper letters, 86 selfloop transitions, 4 changer transitions 1/255 dead transitions. [2022-11-21 16:35:45,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 255 transitions, 1997 flow [2022-11-21 16:35:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:35:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:35:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2022-11-21 16:35:45,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8545751633986928 [2022-11-21 16:35:45,997 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2022-11-21 16:35:45,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2022-11-21 16:35:45,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:45,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2022-11-21 16:35:46,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:46,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:46,002 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:46,002 INFO L175 Difference]: Start difference. First operand has 227 places, 216 transitions, 1277 flow. Second operand 4 states and 523 transitions. [2022-11-21 16:35:46,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 255 transitions, 1997 flow [2022-11-21 16:35:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 255 transitions, 1957 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-21 16:35:46,439 INFO L231 Difference]: Finished difference. Result has 221 places, 217 transitions, 1266 flow [2022-11-21 16:35:46,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1266, PETRI_PLACES=221, PETRI_TRANSITIONS=217} [2022-11-21 16:35:46,440 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 87 predicate places. [2022-11-21 16:35:46,440 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 217 transitions, 1266 flow [2022-11-21 16:35:46,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:46,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:46,441 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:46,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:35:46,442 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:35:46,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:46,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1605684460, now seen corresponding path program 1 times [2022-11-21 16:35:46,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:46,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707963993] [2022-11-21 16:35:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707963993] [2022-11-21 16:35:46,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707963993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401610286] [2022-11-21 16:35:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:46,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:46,995 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:47,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:35:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:47,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:35:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:35:47,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:35:48,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401610286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:48,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:48,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2022-11-21 16:35:48,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954368541] [2022-11-21 16:35:48,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:35:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:35:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:35:48,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 153 [2022-11-21 16:35:48,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 217 transitions, 1266 flow. Second operand has 26 states, 26 states have (on average 104.03846153846153) internal successors, (2705), 26 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:48,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:48,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 153 [2022-11-21 16:35:48,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:53,272 INFO L130 PetriNetUnfolder]: 4313/14080 cut-off events. [2022-11-21 16:35:53,273 INFO L131 PetriNetUnfolder]: For 113094/114203 co-relation queries the response was YES. [2022-11-21 16:35:53,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56390 conditions, 14080 events. 4313/14080 cut-off events. For 113094/114203 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 150546 event pairs, 3125 based on Foata normal form. 92/13205 useless extension candidates. Maximal degree in co-relation 42972. Up to 7324 conditions per place. [2022-11-21 16:35:53,471 INFO L137 encePairwiseOnDemand]: 136/153 looper letters, 56 selfloop transitions, 16 changer transitions 77/239 dead transitions. [2022-11-21 16:35:53,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 239 transitions, 1601 flow [2022-11-21 16:35:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:35:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-21 16:35:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2325 transitions. [2022-11-21 16:35:53,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6907308377896613 [2022-11-21 16:35:53,481 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2325 transitions. [2022-11-21 16:35:53,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2325 transitions. [2022-11-21 16:35:53,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:53,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2325 transitions. [2022-11-21 16:35:53,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 105.68181818181819) internal successors, (2325), 22 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:53,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 153.0) internal successors, (3519), 23 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:53,703 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 153.0) internal successors, (3519), 23 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:53,703 INFO L175 Difference]: Start difference. First operand has 221 places, 217 transitions, 1266 flow. Second operand 22 states and 2325 transitions. [2022-11-21 16:35:53,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 239 transitions, 1601 flow [2022-11-21 16:35:54,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 239 transitions, 1552 flow, removed 23 selfloop flow, removed 6 redundant places. [2022-11-21 16:35:54,060 INFO L231 Difference]: Finished difference. Result has 233 places, 157 transitions, 810 flow [2022-11-21 16:35:54,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=810, PETRI_PLACES=233, PETRI_TRANSITIONS=157} [2022-11-21 16:35:54,061 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 99 predicate places. [2022-11-21 16:35:54,062 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 157 transitions, 810 flow [2022-11-21 16:35:54,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.03846153846153) internal successors, (2705), 26 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:54,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:54,063 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:54,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:54,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:35:54,268 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:35:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash 695165533, now seen corresponding path program 1 times [2022-11-21 16:35:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:54,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519572941] [2022-11-21 16:35:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:56,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:56,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519572941] [2022-11-21 16:35:56,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519572941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:56,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219897669] [2022-11-21 16:35:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:56,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:56,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:56,795 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:56,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:35:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-21 16:35:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:58,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:58,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:35:58,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-11-21 16:36:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:36:00,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219897669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:36:00,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:36:00,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 15] total 52 [2022-11-21 16:36:00,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781245563] [2022-11-21 16:36:00,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:36:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 16:36:00,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:36:00,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 16:36:00,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2140, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:36:00,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 153 [2022-11-21 16:36:00,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 157 transitions, 810 flow. Second operand has 53 states, 53 states have (on average 84.88679245283019) internal successors, (4499), 53 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:00,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:36:00,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 153 [2022-11-21 16:36:00,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:36:22,603 INFO L130 PetriNetUnfolder]: 23645/51142 cut-off events. [2022-11-21 16:36:22,603 INFO L131 PetriNetUnfolder]: For 588729/590322 co-relation queries the response was YES. [2022-11-21 16:36:22,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234257 conditions, 51142 events. 23645/51142 cut-off events. For 588729/590322 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 528867 event pairs, 2222 based on Foata normal form. 2701/51805 useless extension candidates. Maximal degree in co-relation 185644. Up to 12975 conditions per place. [2022-11-21 16:36:23,387 INFO L137 encePairwiseOnDemand]: 125/153 looper letters, 503 selfloop transitions, 454 changer transitions 36/1061 dead transitions. [2022-11-21 16:36:23,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1061 transitions, 10902 flow [2022-11-21 16:36:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-21 16:36:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-11-21 16:36:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 9052 transitions. [2022-11-21 16:36:23,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5857762246812916 [2022-11-21 16:36:23,402 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 9052 transitions. [2022-11-21 16:36:23,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 9052 transitions. [2022-11-21 16:36:23,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:36:23,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 9052 transitions. [2022-11-21 16:36:23,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 89.62376237623762) internal successors, (9052), 101 states have internal predecessors, (9052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:23,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 153.0) internal successors, (15606), 102 states have internal predecessors, (15606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:23,449 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 153.0) internal successors, (15606), 102 states have internal predecessors, (15606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:23,449 INFO L175 Difference]: Start difference. First operand has 233 places, 157 transitions, 810 flow. Second operand 101 states and 9052 transitions. [2022-11-21 16:36:23,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1061 transitions, 10902 flow [2022-11-21 16:36:24,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1061 transitions, 9540 flow, removed 664 selfloop flow, removed 31 redundant places. [2022-11-21 16:36:24,790 INFO L231 Difference]: Finished difference. Result has 320 places, 700 transitions, 7670 flow [2022-11-21 16:36:24,791 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=7670, PETRI_PLACES=320, PETRI_TRANSITIONS=700} [2022-11-21 16:36:24,791 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 186 predicate places. [2022-11-21 16:36:24,791 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 700 transitions, 7670 flow [2022-11-21 16:36:24,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 84.88679245283019) internal successors, (4499), 53 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:24,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:36:24,793 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:36:24,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:36:25,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:36:25,002 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:36:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:36:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1240452282, now seen corresponding path program 2 times [2022-11-21 16:36:25,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:36:25,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366789554] [2022-11-21 16:36:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:36:25,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:36:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:36:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:36:27,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:36:27,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366789554] [2022-11-21 16:36:27,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366789554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:36:27,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284476141] [2022-11-21 16:36:27,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:36:27,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:36:27,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:36:27,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:36:27,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcbcd1e-f1de-4efe-857a-fa6af93f3282/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:36:27,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:36:27,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:36:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 16:36:27,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:36:29,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 16:36:30,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:36:30,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-21 16:36:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:36:30,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-21 16:36:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:36:31,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:36:34,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:36:34,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2022-11-21 16:36:34,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:36:34,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 229 [2022-11-21 16:36:34,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:36:34,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 149 [2022-11-21 16:36:34,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:36:34,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2022-11-21 16:36:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:36:40,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284476141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:36:40,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:36:40,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 68 [2022-11-21 16:36:40,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751761205] [2022-11-21 16:36:40,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:36:40,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-21 16:36:40,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:36:40,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-21 16:36:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=4306, Unknown=12, NotChecked=0, Total=4692 [2022-11-21 16:36:40,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 153 [2022-11-21 16:36:40,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 700 transitions, 7670 flow. Second operand has 69 states, 69 states have (on average 74.6086956521739) internal successors, (5148), 69 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:40,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:36:40,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 153 [2022-11-21 16:36:40,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:36:56,102 WARN L233 SmtUtils]: Spent 14.96s on a formula simplification. DAG size of input: 213 DAG size of output: 181 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:37:34,461 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 234 DAG size of output: 171 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)